News: Industrial and Materials Sciencehttp://www.chalmers.se/sv/nyheterNews related to Chalmers University of TechnologyFri, 17 Jan 2020 15:53:55 +0100http://www.chalmers.se/sv/nyheterhttps://www.chalmers.se/en/departments/ims/news/Pages/Leif-Asp-new-editor-for-Composites-Science-and-Technology.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Leif-Asp-new-editor-for-Composites-Science-and-Technology.aspxLeif Asp new editor for Composites Science and Technology<p><b>​Leif Asp has been appointed editor of the journal Composites Science and Technology. One of the most regarded journals in the world related to composite materials.</b></p><div>​CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. The journal is within Elsevier's publishing house, and a new agreement has been negotiated for open-access publishing with Swedish educational institutions, which will become effective January 1, 2020.</div> <div> </div> <div><br /></div> <div> </div> <div> </div> <div> </div> <div>- I could not say no to this opportunity. In my opinion Composites Science and Technology is the very best journal when it comes to composite materials. It will be very exciting to be part of the editorial board, says Leif Asp.</div> <div> </div> <div> </div> <div> </div> <div><br /></div> <div> </div> <div><h2 class="chalmersElement-H2">An increasing interest in composite materials</h2></div> <div> </div> <div> </div> <div> </div> <div>Composites Science and Technology receives about 4,000 manuscripts each year, of which around 400 are published. So, there is fierce competition to be published.</div> <div> </div> <div> </div> <div> </div> <div><br /></div> <div> </div> <div> - I think it’s important that we see complete studies that include both theory and experiment, and I would also like to see an increase in interdisciplinary and basic studies, says Leif Asp.</div> <div> </div> <div> </div> <div> </div> <div>In recent years, Composites Science and Technology has increased significantly in the impact factor, which currently stands at 6.3. Leif explains this with an increasing interest in research in composite materials:</div> <div> </div> <div><br /></div> <div> </div> <div> </div> <div> </div> <div>- Yes, we have seen that the interest in research in composite materials has increased incredibly. At the last ICCM conference we had about 2000 participants, which is a doubling compared to just a few years ago. So, an increase in the impact factor for Composites Science and Technology is a natural consequence.</div> <div> </div> <div> </div> <div> </div> <h2 class="chalmersElement-H2">About Leif Asp</h2> <div> </div> <div>Leif Asp is professor of Composite Lightweight Materials and Structures in the Division of materials and computational mechanics at the Department of industrial and materials science. Leif's research focuses on effective design methods for carbon fiber composites applicable to vehicles. Leif has also chaired both the European Society for Composite Materials (ESCM) and the International Committee on Composite Materials (ICCM).</div> <div> </div> <div><br /></div> <div> </div> <div><h2 class="chalmersElement-H2">Also read</h2></div> <div> </div> <div><p class="chalmersElement-P"><a href="/en/departments/ims/news/Pages/breakthroughs-of-the-year.aspx">Top ten scientific breakthrough of the year<br /></a></p> <p class="chalmersElement-P"></p> <a href="/en/departments/ims/news/Pages/carbon-fibre-can-store-energy.aspx">Carbon fibre can store energy in the body of a vehicle</a> </div> <p class="chalmersElement-P"> <span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></p>Fri, 17 Jan 2020 00:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/Goran-Wallbergsstipendium-till-Maria-Siiskonen.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Goran-Wallbergsstipendium-till-Maria-Siiskonen.aspxGöran Wallberg Grant to Maria Siiskonen<p><b>​​
Congratulations to Maria Siiskonen, who was awarded a grant of SEK 50,000 from the Chalmers Foundation and Göran Wallberg&#39;s Memorial Fund in 2019, which will give funding for a four-month stay in Copenhagen, Denmark.</b></p><br /><div>
The Chalmers alum Göran Wallberg (VV-45) generously donated 2 million with the aim of helping students and younger researchers to gain international experience during their studies. The grant covers the areas of ICT (Information and Communication Technology), Production Technology and Environmental Technology.
</div> <div>&quot;It's a very nice Christmas present,&quot; says Maria Siiskonen, PhD student at the Department of Industrial and Materials Science, Chalmers. “I will use the grant for a research stay at the Technical University of Denmark, DTU, to learn more about adaptable manufacturing systems for personalized medicines.”</div> <div><br /></div> <div><strong>
Looking for solutions
</strong></div> <div>Maria Siiskonen's previous research has focused on product design and how different functionalities can be incorporated into medicines, for example in tablets. It makes it possible to adapt the medicine to the needs of the individual patient and thus optimize patients' treatments against a number of different diseases. 
</div> <div>A consequence from product customization is the accelerating number of product variants and previous studies indicate that current pharmaceutical production systems are not flexible enough to enable production of customized product in an economically feasible manner.
 </div> <div>“I want to take a closer look at how the production systems for individualized medicines to find how they should be designed, both from an economic and sustainable perspective. My focus will be on the adaptability and flexibility of the systems to meet the demand for patient-adapted product variants.”

 </div> <div><br /></div> <div><strong>Strong research at DTU attracts
</strong></div> <div>Maria explains that DTU's research group has a good reputation in the research area, in terms of the field of product customization and strategic approaches to product portfolio design.</div> <div>“Being here for a couple of months, will give me excellent opportunities to get a first-hand insight into their methods, discover new tools and hopefully get optimized product development methods to bring home with me. I think this will be an excellent opportunity to develop as a researcher”, concludes Maria.

</div> <div><br /></div> <div><span style="font-weight:700"><a href="https://research.chalmers.se/en/person/?cid=simaria" target="_blank" title="link to new webpage"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more of Maria Siiskonens research​</a></span><br /></div> <div><br /></div> <div><em>Text: Carina Schultz / Maria Siiskonen
</em></div> <div><em>Photo: Carina Schultz</em></div> <div><br /></div> <div><br /></div> <div><br /></div>Thu, 16 Jan 2020 00:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/Perceived Quality of Cars.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Perceived%20Quality%20of%20Cars.aspxPerceived Quality of Cars<p><b>​Kostas Stylidis, Product Development​ IMS, defends his doctoral thesis &quot;Perceived Quality of Cars. A Novel Framework and Evaluation Methodology.&quot; on February 6, 2020. Opponent: Prof. Thomas J. Howard, Centre for Technology Entrepreneurship, Technical University of Denmark, Denmark Examiner: Prof. Rikard Söderberg IMS ​​</b></p><strong>Popular description</strong><div><div><div>Average consumer sees a car’s quality as a fancy mixture of a reliability, performance, design, aesthetics, and own previous experiences, unlike as a combination of mechanical parts, software pieces, advanced materials, cutting-edge manufacturing processes, with technical knowledge, skills and high production volumes – all ingredients involved into the modern car creation. Quite often, “humans do not see and act on the physical qualities of things, but on what they mean to them.” Closing the door of a Mercedes-Benz S-Class limousine produces signature sound with a vault-like thunk, making us react by generating multisensory images within ourselves. Handling certain premium quality wood panels gives a more sophisticated tactile impression than with a cheap plastic. The first olfaction, when entering a new Cadillac vehicle, creates a feeling of luxury, very different from that in a used car sold by a nearby car dealer shop.</div> <div><br /></div> <div>As one can see, understanding human’s perception of quality is a big challenge for researchers and practitioners. “What product features require the most attention for successful car design?” – The question engineers and designers need to answer under the pressure of shrinking product development time, a boost of available technologies, and financial limitations. Not to mention, the answer is expected to be given in numbers to sustain a fierce competition in the automotive industry. In that case, if a car manufacturing company wants to secure the ability to meet the consumer’s expectations, there is a need to control the perceived quality. Easy to say, hard to do.</div> <div><br /></div> <div>Perceived quality is a complex, multifaceted adaptive system - a system where a human is the main agent. Therefore, many perceived quality attributes are difficult to define explicitly. This fact creates a “wicked problem” for any car manufacturer. </div> <div><br /></div> <div>To confront the problem, we need to name it. For this reason, the perceived quality in engineering science has been defined and structured as the Perceived Quality Framework (PQF), in the form of a two-dimensional typology: (i) Technical Perceived Quality (TPQ), encompassing intrinsic attributes - everything that is part of a product and can be controlled by design and/or engineering specifications; (ii) Value-based Perceived Quality (VPQ), including extrinsic attributes - such as brand image, brand heritage, affective consumer judgments, design, hedonic or social values, the impact from other global attributes, advertising, and marketing promotion techniques. </div> <div><br /></div> <div>The perceived quality domain is a place where the product meaning, form, sensorial properties, and their execution intersect with human experience. Such an experience is driven by the interplay between product quality and its context. The ultimate goal is to find the trade-off between perceived quality elements. This resulted in the creation of the Perceived Quality Attributes Importance Ranking (PQAIR) method. The novel methodology was created to assist the engineer or designer in the decision-making process regarding the relative importance of perceived quality attributes for the final product. The PQAIR method illuminates the interplay between technical characteristics of the product and customer perceptions. The successful implementation of the method can help find an answer to the question, “What makes you, as a consumer, to fall in love with a specific car?” This is, after all, a very “expensive” question. Billion-dollar decisions in the automotive industry often rely on predictions and assumptions about how a customer will perceive and evaluate such a complex product as a car. The ontology of PQF and its principles shifts the perceived quality evaluation processes towards the objective and reproducible side. </div></div> <div><br /></div> <div></div> <div>Keywords: perceived quality, automotive, product development, product quality, premium, luxury,</div> <div>knowledge management, design, aesthetics, engineering;</div></div> <div><br /></div> <div><a href="https://research.chalmers.se/en/publication/514275"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><a href="https://www.linkedin.com/in/kostas-stylidis/"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Kostas Stylidis on LinkedIn</a></div> <div><br /></div> <div><div><strong>Public defence</strong></div> <div>2020-02-06 09:00</div> <div>Virtual Development Laboratory (VDL), Chalmers Tvärgata 4C, Johanneberg Campus, Gothenburg</div></div> <div><br /></div> ​Wed, 15 Jan 2020 00:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/New-unique-test-opportunities-in-bio-based-materials-at-MAX-IV.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/New-unique-test-opportunities-in-bio-based-materials-at-MAX-IV.aspxNew unique test opportunities in bio-based materials at Max IV<p><b>​During 2020-2021, Chalmers will create new unique test opportunities for research in bio-based materials in the world-leading synchrotron facility Max IV. It is mainly research in the field of cellulose that will have better conditions than ever before.</b></p><div><br /> </div> <div>​<img class="chalmersPosition-FloatRight" alt="MAX IV" src="/SiteCollectionImages/Institutioner/IMS/Konstruktionsmaterial/MAXIV.JPG" style="margin:5px 15px;width:324px;height:220px" /><a href="https://www.maxiv.lu.se/">Max IV</a> has the world's strongest synchrotron light, which creates entirely new conditions in the exploration of the innermost structure of materials. The facility was completed in Lund 2016 and has a large ring filled with fast electrons. By forcing them into magnets in a high-speed slalom path and in an extremely precise manner, x-rays are created, allowing one to see smaller components than usually possible. The x-rays are then directed into different beamlines depending on what you want to explore.</div> <div><br /><br /></div> <div><h2 class="chalmersElement-H2">A flexible rheometric system for Cosaxs and Formax</h2></div> <div>At the Department of Industrial and Materials Science at Chalmers a modular and flexible rheometric system will be developed for the two beamlines <a href="https://www.maxiv.lu.se/accelerators-beamlines/beamlines/cosaxs/">Cosaxs</a> and <a href="https://www.maxiv.lu.se/accelerators-beamlines/beamlines/formax/">Formax</a>. The purpose is to strengthen research and industry needs for the development of bio-based materials, especially from cellulose. Bio-based cellulose material is something that hopefully will replace much of the oil-based plastic that is manufactured today.</div> <div><br /> </div> <div><h3 class="chalmersElement-H3">Flow behaviour in soft materials</h3></div> <div>Rheometry investigates the relationship between force and motion in semi-solid and liquid materials and how it affects the properties of the material. In soft materials, it is important to investigate the correlation between the molecular structure and the behavior of the material. The greater precision in how to predict the flow behavior of the material through rheometric models, the better the conditions for creating new materials with better properties.</div> <div><br /> </div> <div><img class="chalmersPosition-FloatLeft" alt="Roland Kadar" src="/SiteCollectionImages/Institutioner/IMS/Konstruktionsmaterial/RolandKadar_Chalmers_600px.jpg" style="margin:5px 35px;width:200px;height:220px" /><span></span>  <br /></div> <div><span>–<span style="display:inline-block"></span> ​The Max IV in itself is set to provide unique scientific opportunities and we have the ambition to add to that several unique rheological testing options. We are dedicating our research and development efforts to make the system available to the general users, says Associate Professor Roland Kádár who will lead the development work at Chalmers.</span><span><br /></span></div> <div><span><div> </div> <div><br /> </div> <div><br /></div> <div><h2 class="chalmersElement-H2">Researchers<br /></h2></div> <div>The development work will be performed in the group of Associate Professor <a href="/en/staff/Pages/roland-kadar.aspx">Roland Kádár</a> in the Division of Engineering Materials at the Department of Industrial and Materials Science, in cooperation with scientists at the Department of Physics (<a href="/en/staff/Pages/Marianne-Liebi.aspx">Marianne Liebi</a>, <a href="/en/staff/Pages/Aleksandar-Matic.aspx">Aleksandar Matic</a>) and <a href="https://www.maxiv.lu.se/">Max IV</a> (Kim Nygård and Ann Terry). </div> <div><br />The funding comes from Formax´-preproject and Chalmers Foundation</div> <div><br /> </div> </span><span><div><em>Photo of M​ax IV facility: Perry Nordeng</em> </div></span><span></span><span></span><span></span><span></span><span></span><span></span><br /><span></span></div>Tue, 14 Jan 2020 00:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/Methods-for-efficient-modelling-of-progressive-failure-in-laminated-fibre-reinforced-composites.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Methods-for-efficient-modelling-of-progressive-failure-in-laminated-fibre-reinforced-composites.aspxMethods for efficient modelling of progressive failure in laminated fibre-reinforced composites<p><b>​Johannes Främby, Doctoral Student at Material and Computational Mechanics​ IMS, defends his doctoral thesis on January 17 2020. Opponent: Prof. Stephen Hallett, University of Bristol, United Kingdom</b></p><strong>​Abstract</strong><div><div>To meet increasing demands on reduced CO2 emissions, the automotive industry is currently very active in research to reduce vehicle weight by incorporating light-weight materials like laminated composites into structural components.</div> <div><br /></div> <div>Historically, composite materials have mainly been used in the aerospace industry, whereby the virtual design and development tools for composite structures have been developed primarily to the specific needs and requirements in this industry. In general, the crashworthiness of aerospace structures is only assessed to a small extent. Especially, compared to that of automotive vehicles, where high rating in crash tests are a key selling argument. Consequently, no suitable virtual tools, capable of assessing the crashworthiness of composite automotive structures, have been developed. This lack of virtual tools is problematic since the development of modern automotive vehicles is almost exclusively driven by virtual developments. Without access to tools for crashworthiness assessment of composite materials, these materials will not be widespread in automotive vehicle structures. </div> <div><br /></div> <div>The fracture process of laminated composites is far more complicated than that of metals, the dominant class of materials used in automotive crash protection systems today. Thus, virtual tools developed for metals cannot be used to accurately predict the crashworthiness of composite materials. Instead, highly refined models that can resolve the complicated fracture process must be used. However, these models require excessive computational resources, making full-scale vehicle crash simulations infeasible. It is therefore crucial to develop computationally efficient virtual tools, which can accurately predict the crashworthiness performance of composite structures.</div> <div><br /></div> <div>In this thesis, I will present a route towards full-scale vehicle crash simulations using an automatic-refinement method. The method is based on a computationally efficient shell model which, during the simulation, is automatically transformed to a highly refined model in areas where needed. This way, the increased computational cost, associated with the analysis of progressive damage in laminated composites, can be limited. </div> <div><br /></div> <div>The proposed method can successfully reproduce the same level of accuracy as a highly refined model, at lower computational cost. Consequently, this method can help to enable computationally efficient crash simulations of laminated structures, which in the long run will allow composite materials to have a widespread use in future automotive vehicles.</div></div> <div><br /></div> <div><a href="https://research.chalmers.se/en/publication/514650"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><a href="https://www.linkedin.com/in/johannesframby"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Johannes Främby on LinkedIn</a></div> <div><br /></div> <div><span></span><div><strong>Public defence</strong></div> <div>2020-01-17 09:00</div> <div>Virtual Development Laboratory, Chalmers</div></div> <div><br /></div>Thu, 09 Jan 2020 11:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/Electric-aviation-in-Sweden.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Electric-aviation-in-Sweden.aspxElectric aviation<p><b>​​Aviation accounts for 2 per cent of global CO2 emissions, and the proportion is expected to increase to 15–27 per cent by 2050. So, there is a need for alternative sustainable solutions. Elise (Electric Aviation in Sweden) is a research project that has investigated how to plan and utilize electric aircraft in Sweden.</b></p>The development of electric aviation is yet in its infancy, but there are already prototypes of electric airplanes flying today. Even though it will take a lot of development before long distance flights can be replaced, this might be a technology that will re-draw the map for transportation. A third of all domestic flights in Sweden are shorter than 400 km. Short-haul flights have been identified as an area where electric airplanes can, not only replace conventional airplanes but also, enable new flight routes to more communities in rural areas. The expansion of new routes can also be a way to sustainably replace transportation on the ground. <br /><div><br /></div> <div><h2 class="chalmersElement-H2">Spin-off aviation company</h2></div> <div>Heart Aerospace is a new small aviation company that is direct spin-off from the research project Elise. Anders Forslund, researcher at Elise, decided to start up the company after receiving funding from the Silicon Valley based Y Combinator. Heart Aerospace are now located in Gothenburg and aims to have a 19-passenger electric airliner certified for commercial flight by 2025 with an operating range of 400 km. </div> <div><br /></div> <br /><div><img src="/SiteCollectionImages/Institutioner/IMS/Produktutveckling/AndersForslund.jpg" alt="Anders Forslund" class="chalmersPosition-FloatLeft" style="margin:5px 30px;width:164px;height:184px" /></div> <div><br /></div> <div>– Sweden has a strong history of research and development in aviation. I think that electric aviation has the potential to be a new big market that can benefit both the climate and Sweden as a country. Norway, where over half of the flights are considered short distance, have decided to electrify all domestic flight before 2040, says Anders Forslund.</div> <br /><br /><br /><br /><div><h2 class="chalmersElement-H2">About Elise</h2></div> <div>Elise is a collaboration between Chalmers University of Technology, RISE Viktoria, QRTECH and the Civil Aviation Administration, with a reference group including SAAB, GKN Aerospace, Volvo Cars and Gothenburg City. </div> <br /><div>Funded by the Swedish innovation agency Vinnova.</div>Thu, 05 Dec 2019 00:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/Report-from-the-ECODESIGN-conference-.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Report-from-the-ECODESIGN-conference-.aspxReport from EcoDesign2019 in Yokohama<p><b>​​The 11th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign 2019) took place in Yokohama, Japan, 25-27 November 2019. This 3-days event celebrated the 20th anniversary of the symposium which was first held in Tokyo in 1999.</b></p><div><img src="/SiteCollectionImages/Institutioner/IMS/Övriga/EcoDesign_logo.PNG" alt="EcoDesign logo" class="chalmersPosition-FloatLeft" style="margin:5px;width:206px;height:214px" />The EcoDesign symposium promotes environmentally conscious design of products, services, manufacturing systems, supply chain, consumption, and society. It provides a platform for experts from industry, academia, research institutes, consulting, and government to share state-of-the-art research and practices in EcoDesign.<br /></div> <div>  </div> <div>Keynote speakers at the event included Andrew Morlet (Chief Executive Officer, Ellen MacArthur Foundation), Kazumi Hanada (Corporate Vice President, RICOH Industry Co., Ltd.), and Fabrice Mathieux (Directorate-General Joint Research Centre - JRC, Sustainable Resources Directorate, European Commission).</div> <div> </div> <div>This event also benefited from a strong Swedish presence with researchers from Chalmers University of Technology, Lund University, Linköping University, and RISE IVF who chaired and presented their work on the topics of cyber-physical production systems, circular economy in the manufacturing industry, product service system design, circular consumption and use perspectives. </div> <div> </div> <h2 class="chalmersElement-H2">Chalmers contributed to the event through two organised sessions: </h2> <ul><li>'Embedding Sustainability in Cyber-Physical Production Systems' chaired by Mélanie Despeisse</li> <li>'Circular Consumption and Use Perspectives' chaired by Anneli Selvefors<br /></li></ul> <div> <strong>… and five papers presented at the EcoDesign 2019:</strong></div> <ul><li>Arpita Chari - Stakeholders’ Influence towards Sustainability Transition in Textile Industries</li> <li>Ninan Theradapuzha Mathew - Environmental and Economic Impacts of Biofouling on Marine and Coastal Heat Exchangers</li> <li>Xiaoxia Chen - The Environmental Implications of Digitalization in Manufacturing: A Case Study</li> <li>Clarissa  González - State-of-the-Art on Product-Service Systems and Digital Technologies</li> <li>Oskar Rexfelt - A Toolkit for Designing Products and Services Fit for Circular Consumption<br /></li></ul> <div> </div> <div>All five papers will be included in the proceedings published by Springer after the symposium.</div> <div> </div> <div><em>Text: Mélanie Despeisse</em></div>Wed, 27 Nov 2019 00:00:00 +0100https://www.chalmers.se/en/departments/ims/news/Pages/CDIO-seminar-report.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/CDIO-seminar-report.aspxReport from the CDIO seminar on: Towards agile, interdisciplinary and individualised engineering education<p><b>​About 50 interested researchers and teachers gathered at Chalmers on October 17 for the CDIO seminar &quot;Towards agile, interdisciplinary and individualised engineering education&quot; arranged by Prof. Johan Malmqvist, Chalmers.</b></p>​<span style="background-color:initial">Engineering education has traditionally been delivered in long, discipline-specific programmes such as mechanical, electrical or civil engineering. This setup has been successful for almost 200 years but is challenged in today’s situation where students need to be better prepared for addressing transdisciplinary problems in, for example, sustainable development, automation and sports technology. In addition, the fast pace of technology development requires frequent updates of educational content, not easy to combine with the 4-5 year change cycle of current engineering curricula. Furthermore, today’s students are expecting an education that enables a high degree of individualisation.</span><div><br /></div> <div>The seminar aimed to present and discuss novel agile, interdisciplinary and individualized curricular design approaches with particular relevance to CDIO education. How to ensure stakeholder engagement, how to establish and maintain a change culture and how operate these models for large student groups are among the topics to be focused.​</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/fragestundsharepoint.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><br /><br /><br /></div> <div><span style="background-color:initial">The seminar provided an opportunity to learn insights from some leading experts in the area and sharing knowledge and experiences with other CDIO educators.</span><br /></div> <div><br /></div> <div>After a short introduction by Johan Malmqvist, Kristina Henricson Briggs and Mikael Enelund from Chalmers, talked about the new initiative &quot;<a href="http://www.cdio.org/files/TRACKS%20CDIO%20workshop_ME_ver3.pdf">TRACKS: An initiative for change, flexibility, interdisciplinarity and creativity in engineering education</a>&quot;.</div> <div><br /></div> <div>Bjørn Sortland is associate professor and head of Experts in Teamwork at NTNU gave a presentation called &quot;<a href="http://www.cdio.org/files/Introduksjon%20EiT%20CDIO.pdf">Experts in teamwork at NTNU</a>&quot;. </div> <div><br /></div> <div>&quot;<a href="http://www.cdio.org/files/C.%20Fortin%20-%20CDIO%20Chalmers%20Oct%202019.pdf">Development of an entrepreneurship culture in a research focus university</a>&quot; was the title of Clément Fortin's talk. He is an Associate Provost at Skoltech in Moscow, the new international university founded in collaboration with MIT. </div> <div><br /></div> <div>Senior lecturer Suzanne Brink gave a spech with the title &quot;<a href="http://www.cdio.org/files/CDIO%20Seminar%20Okt19%20Suzanne%20Brink%20r.pdf">Curriculum changes towards agility and flexibility</a>&quot;.</div> <div><br /></div> <div>All talks were followed by fruitful discussions. </div> <div><br /></div> <div><div><img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/panelledaresharepoint.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:10px" /><br /><br />The final panel discussion that further developed the discussions was lead by:</div> <div><br /></div> <div>Aldert Kamp, TU Delft and CDIO co-director</div> <div>Sakari Koivunen, Turku University of Applied Sciences</div> <div>Per Lundgren, Chalmers University of Technology, MC2</div></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><div><strong>K</strong><strong style="background-color:initial">eynotes </strong></div> <div><span style="background-color:initial">For presentation of the keynote speakers, see </span><a href="http://www.cdio.org/meetings-events/cdio-seminar-towards-agile-interdisciplinary-and-individualised-engineering">seminar invitation</a><br /></div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/keynotecdiosharepoint.jpg" alt="" style="margin:5px" /><br /><br /><strong>From left: </strong>Suzanne Brink, Bjørn Sortland, Kristina Henricson Briggs, Clément Fortin, Johan Malmqvist (Organiser), Mikael Enelund <br /></div></div> <div><br /></div> <div><a href="http://www.cdio.org/"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More information on CDIO.org</a></div> <div><br /></div> ​Fri, 18 Oct 2019 12:00:00 +0200https://www.chalmers.se/en/departments/ims/news/Pages/Multi-scale-modeling-and-finite-element-simulation-of-diffusion-in-porous-media.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Multi-scale-modeling-and-finite-element-simulation-of-diffusion-in-porous-media.aspxMulti-scale modeling and finite element simulation of diffusion in porous media<p><b>​Nele Pollmann, PhD student at Material and Computational Mechanics​, IMS defends her doctoral thesis &quot;Multi-scale modeling and finite element simulation of diffusion in porous media&quot; on November 8, 2019.</b></p>​<img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/Pollmann%20webb.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><br /><div><div><strong><br /></strong></div> <div><strong style="background-color:initial">Nele Pollmann</strong><br /></div> <div><span style="background-color:initial">Division of Material and Computational Mechanics, Industrial and Materials Science, Chalmers<span></span><br /></span></div> <div><br /></div> <div><br /></div> <div><div>Opponent: Professor Marc-André Keip, Institute of Applied Mechanics (CE), University of Stuttgart, Germany</div> <div><br /></div> <div>Supervisor: Ralf Janicke, IMS</div> <div><span></span>Examiner: Fredrik Larsson, IMS</div> <div><br /></div> <span></span><div><strong>Public defence</strong></div> <div>2019-11-08 10:00</div> <div><span style="background-color:initial">VDL, Tvärgata 4C, Chalmers</span>, </div> <div><br /></div> <strong></strong></div> <div><strong><br /></strong></div> <div><strong><br /></strong></div> <div><div><a href="https://research.chalmers.se/en/publication/?id=512796"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><a href="https://www.linkedin.com/in/nele-p-361787169/"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Nele Pollmann Linkedin</a></div></div> <div><strong><br /></strong></div> <div><strong><br /></strong></div> <div><strong><br /></strong></div> <div><br /></div> <div><strong><br /></strong></div> <div><strong><br /></strong></div> <div><strong style="background-color:initial">POPULAR SCIENCE DESCRIPTION</strong><br /></div> <div>Porous media comprise a large range of natural or industrial materials with a broad spectrum of applications. It is part of our everyday life e.g. in form of bread, a simple rinsing sponge or a brick used for building. Thus, it has always been part of our environment.</div> <div>Porous media are highly complex on different scales which gets clearer with the aid of an example such as sandstone. When hiking in the Elbe Sandstone Mountains one could take a closer look at the rock and get aware of small and large fractures as a form of heterogeneities. Taking an even closer look, e.g. with a magnifier, small grains are visible such as in sand.</div> <div>Of special interest is the behavior of this material if it is saturated with fluid (e.g. water, oil, gas). If the porous media is filled with fluid, transport processes occur, e.g in form of fluid flow. This is, among others, important for geothermal energy production, environmental remediation or the corrosion process of reinforced concrete buildings (due to de-icing fluid).</div> <div><br /></div> <div>During the production of deep geothermal energy e.g., the rock is hydraulically stimulated, i.e. fractures are induced by pumping water under high pressure in the ground. These fractures enhance the conductivity of the rock, which is used for energy production. The hydraulic stimulation of rock causes seismic attenuation, i.e. small to large earthquakes in the reservoir. Therefore, the ability to detect, to understand and to simulate seismic attenuation helps decision makers to forecast whether or not a rock region is suitable for hydraulic stimulation.</div> <div>This thesis numerical examines the processes in porous media, to gain results that can e.g. be used to interpret field data such as of seismic exploration. Therefore different numerical approaches are investigated on the basis of the Theory of Porous Media and validated against suitable benchmarks. In summary the thesis provides a deeper understanding of diffusion processes in porous media and investigates a suitable toolbox to compute the overall material behavior of porous media, taking into account heterogeneities such as fractures in rock or aggregate content in concrete, on different scales.</div> <div><br /></div></div>Wed, 16 Oct 2019 16:00:00 +0200https://www.chalmers.se/en/areas-of-advance/production/news/Pages/Chalmers-Sustainability-Day-2019---interview-.aspxhttps://www.chalmers.se/en/areas-of-advance/production/news/Pages/Chalmers-Sustainability-Day-2019---interview-.aspxChalmers Sustainability Day: Minimised waste and maximum use<p><b>The 8th of November, it&#39;s time for this year&#39;s edition of Chalmers Sustainability Day. The theme Circular Economy is a common word within sustainability but what does it really mean? We asked Anton Grammatikas and Lars Nyborg, responsible for this year&#39;s event, to brief us.</b></p><strong>​</strong><a href="/en/about-chalmers/Chalmers-for-a-sustainable-future/sustainability-day2019/Pages/masterclasses.aspx" target="_blank" style="font-family:&quot;open sans&quot;, sans-serif;font-size:16px"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />​Find the program here​​</a><div><br /></div> <span style="background-color:initial"><strong>Hello Anton Grammatikas, project manager for Chalmers Sustainability Day. Tell us a bit about the arrangement!</strong></span><div>&quot;We will start the day with a master class session, where some of Chalmers' own researchers, leading in their respective fields, give lectures about their research linked to the theme of circular economics. We want to give a broad perspective on the concept, ranging from business models, materials, product development to future civil society. The first talk of the day will be held by an invited speaker who can give a broad understanding and background to the theme.&quot;</div> <div><br /></div> <div><strong>Circular economy - how would you describe it?</strong></div> <div>&quot;Oh, there are many descriptions of it. To me it is about being able to dare to change from linear to circular business models. To achieve true sustainability, we not only need to change our technical conditions, but also the ways we consume. Everything has to be linked, from business value for those who produce and deliver products and services, to the actual customer benefit.&quot;</div> <div><br /></div> <div><strong>What do you hope Chalmers Sustainability Day will bring?</strong></div> <div>&quot;I want more people to be inspired and take circular economics into account in their research, in a wider sense than today. Chalmers vision to make the future more sustainable is reinforced by paying attention to all research internally. I hope this will create awareness of ongoing activities, so that synergies are found in various research areas.&quot;</div> <div><br /></div> <div><strong>Is it still time to propose something for the programme?</strong></div> <div>&quot;We have closed the agenda for the master class session but there are still a few slots open in the afternoon progamme. If you have a suggestion – talk to us! We hope for a greater participation of researchers and teachers this year. A possibility that not so many have reacted to is the poster exhibition. We would like to see more proposals here!&quot;</div> <div><br /></div> <div><strong>The collaboration with the Student Sustainability Week Act! Sustainable is new this year! How will they contribute? </strong></div> <div>&quot;Above all, they can contribute with their perspective. The students have high demands on Chalmers as a university to work more with sustainability internally, but they also push to steer their education towards the circular perspective. We hope many students will show up and be able to take part in research and be inspired to make their own circular choices in the future.&quot;</div> <div><br /></div> <div><br /></div> <div><br /></div> <div><div><b><img src="/SiteCollectionImages/Areas%20of%20Advance/Production/750x340_Lars-Nyborg_SDG12.jpg" alt="Picture of Lars Nyborg, director of Production Area of Advance" style="margin:5px;width:680px;height:312px" /></b><br /><br /><span></span><em>This year's theme is broad and embraces much of the research within the Areas of Advance, says Lars Nyborg, Director for Production Area of Advance and the organizer 2019 for Sustainability Day. Photo: Carina Schultz​</em><br /><br /><b>Hello Lars Nyborg, Director for the Production Area of Advance and responsible for this year's sustainability day at Chalmers. Why the choice of circular economy as a theme?</b></div> <div></div> <div>- We chose to focus on circular economics, as it is a theme that unites many of Chalmers Areas of Advance. The solutions of the future lie in how we implement circularity in society and here we have an opportunity to discuss it thoroughly. The theme can work both for big issues and in the small perspective as an individual citizen. We believe the theme can inspire and provide new knowledge for everyone - students, researchers and other staff at Chalmers.</div> <div><br /></div> <div><strong> What does circular economy mean to you?</strong></div> <div>- It's a quite difficult concept and theme. There is not only one answer, but many. I would like to compare the concept of circular economy to an umbrella, under which several different contexts and definitions can be gathered.</div> <div><br /></div> <div><strong>What do you hope visitors will bring home from the event? </strong></div> <div>- I hope for increased commitment and an understanding of what circular economics is. I also wish for a broadened understanding that a sustainable future is a matter of creating solutions. I would also be interesting if the discussions include a questioning attitude regarding suggested solutions. A sharper dialogue and debate are important for showing a sustainable way forward. Here, Chalmers can really contribute.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Areas%20of%20Advance/Production/SDG-9-11-12.jpg" alt="Picture of the logos of sustainable goals 9, 11 and 12" style="margin:5px;width:690px;height:345px" /><br /><br /><br /></div> <div><strong>FACTS:</strong></div> <div>Chalmers Sustainability Day takes place on 8 November at the Chalmers Conference center. Campus Johanneberg. The event is primarily for Chalmers employees and students.</div> <div>This year's theme is circular economy and Production Area of Advance organizes this year's event.</div> <div>The Sustainability Day is being commissioned by Chalmers management through Anna Dubois, Vice President of Chalmers Areas of Advance.</div> <div><br /></div> <div>This year, we cooperate with the Gothenburg students' sustainability week, <a href="https://www.actsustainable.se/">Act! Sustainable</a>, which runs from November 4-9, where Friday, November 8, is the Chalmers students Day.</div> <div><br /></div> <h3 class="chalmersElement-H3"><a href="/en/about-chalmers/Chalmers-for-a-sustainable-future/sustainability-day2019/Pages/default.aspx" target="_blank" title="link to program"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />SEE PROGRAM​</a></h3> <div><br /></div> <div><br /></div> <div><strong>CONTACT:</strong></div> <div><a href="mailto:carina.schultz@chalmers.se">Carina Schultz​</a>, Communications Officer</div> <div>mob 0733-68 99 96</div> <div><a href="mailto:anton.grammatikas@boid.se" title="link to email">Anton Grammatikas</a>, Project manager</div> <div>mob 0708-88 26 20</div> <div><br /></div> <div><a href="https://ui.ungpd.com/Surveys/5f858562-1a50-4f2f-ad49-1ac0c2f82675" target="_blank" title="link to proposal form"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to proposal form</a></div> <div><a href="http://www.chalmers.se/insidan/SV/aktuellt/nyheter/artiklar/inbjudan-att-bidra-med9722" target="_blank" title="link to more info"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more on how to participate</a></div> <div><a href="/sv/styrkeomraden/produktion/kalendarium/Sidor/Chalmers-hållbarhetsdag.aspx" target="_blank" title="link to calender post"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Calender post</a></div></div> ​​Thu, 26 Sep 2019 00:00:00 +0200https://www.chalmers.se/en/departments/ims/news/Pages/Smart-Maintenance---maintenance-in-digitalized-manufacturing.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Smart-Maintenance---maintenance-in-digitalized-manufacturing.aspxSmart Maintenance - maintenance in digitalized manufacturing<p><b>​Jon Bokrantz, PhD student at the division of Production Systems​ IMS defends his doctoral thesis &quot;Smart Maintenance - maintenance in digitalized manufacturing&quot; on Nov 15, 2019 Opponent: Professor Marco Macchi, Politecnico di Milano, Italy, marco.macchi@polimi.it</b></p><strong>​Abstract</strong><div><div>Maintenance practitioners are faced with the daunting task of figuring out the challenges and opportunities of industrial digitalisation. They are expected to develop realistic yet visionary maintenance strategies to secure the success of highly digitalised production systems. However, this requires answers to many difficult questions. What type of technologies should be employed? What type of skills are needed? How should one collaborate with other parties? What are the benefits? Even with those answers in hand, the means by which the strategies can be realized are not well understood. How can we measure our current status and track our digitalisation progress over time? How should we prioritize our actions in order to reach our strategic targets? How can we learn from others? This thesis brings clarity to such questions. Specifically, this thesis describes future scenarios for maintenance in digitalised manufacturing, conceptualizes “Smart Maintenance”, and develops an instrument to measure Smart Maintenance in manufacturing plants.</div> <div>The scenarios allow practitioners to see the bigger picture of digitalisation, consider changes that they might otherwise ignore, and begin to develop long-term strategies for maintenance organizations. The rich, understandable, and action-inspiring conceptualization of Smart Maintenance brings clarity to practitioners and policy-makers, supporting them in developing implementation strategies and initiatives to elevate the use of Smart Maintenance. Specifically, Smart Maintenance is defined as “an organizational design for managing maintenance of manufacturing plants in environments with pervasive digital technologies” and has four core dimensions: data-driven decision-making, human capital resource, internal integration and external integration. The measurement instrument makes it possible to measure Smart Maintenance in manufacturing plants, and consists of a set of questionnaire items that measure the four dimensions of Smart Maintenance. It can be used by practitioners to assess, benchmark and longitudinally evaluate Smart Maintenance in their organization, which serves to develop evidence-based strategies for successful implementation.</div> <div>Taken together, this thesis provides a holistic understanding of Smart Maintenance that ensures high performance manufacturing in digitalised environments. To know more about what the future of maintenance entails, what Smart Maintenance really is, and how Smart Maintenance can be measured, you are kindly invited to turn this book around, open the first page, and start reading the thesis. I hope you will learn a lot.</div></div> <div><br /></div> <div><a href="https://research.chalmers.se/en/person/bokrantz"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More about Jon Bokrantz</a></div> <div><br /></div>Tue, 24 Sep 2019 10:00:00 +0200https://www.chalmers.se/en/departments/ims/news/Pages/Vinh-win-in-European-master-thesis-competition.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Vinh-win-in-European-master-thesis-competition.aspxVinh-win in European master thesis competition<p><b>During the EUROMAT conference in Stockholm, a true Vinh-win situation happened. Vinh Tu, Chalmers University of Technology, was selected as one of the winners of Europe&#39;s top master theses 2019 on Materials Science and Engineering.​</b></p>​<span style="background-color:initial">The master thesis of Vinh Tu, former master student within Applied Mechanics, was selected by the Federation of European Materials Societies (FEMS) as one of Europe's top master theses 2019 on Materials Science and Engineering. Vinh was invited to attend the EUROMAT congress that took place in Stockholm 1-5 September. He presented his work during the final round of the master thesis competition. The prize committee awarded him with a fantastic 2nd place.</span><div><br /><span style="background-color:initial"></span><div><b><img src="/SiteCollectionImages/Institutioner/IMS/MoB/Vinh-diploma_225x300.jpg" alt="A close up on the diploma" class="chalmersPosition-FloatRight" style="margin:5px 10px" />“To me, this is a proof </b>that we do world class research,&quot; says professor Leif Asp, one of Vinh’s supervisors. &quot;Out of all material science societies around Europe, they identified four finalists. One of them came from Chalmers and he ended up in second place. Clearly, we do things that interest people and is viewed upon as something original and strong.&quot; </div> <div><br /></div> <div><b>The competition started</b> last year and is based on the nomination by the different materials science societies across Europe, currently 23 member societies. Vinh Tu was selected to represent Sweden on behalf of the Swedish Society for Materials Technology (SFMT) and he <span style="background-color:initial">was surprised by the nomination:</span></div> <div><span style="background-color:initial"><br /></span></div> <div><strong>“I feel very honored</strong> and happy that I got to participate in the competition. It was also very fun to attend such a large conference with so many interesting presentations. This couldn’t have been possible without the constant support of my supervisors at the division.&quot;</div> <div><br /></div> <div></div> <div><b>“This is really outstanding</b>, and I think it’s quite a success story for Vinh as well as for our department. I also found it particularly remarkable that Vinh as a student from Applied Mechanics wins an award from Materials Science community.​</div> <div><span></span><span></span><div><b><br /></b></div> <div><b>FACTS</b></div> <div><b>Title of Vinh's thesis and presentation: </b><a href="https://odr.chalmers.se/handle/20.500.12380/256695">Modelling and finite element simulation of the bifunctional performance of a microporous Structural Battery Electrolyte</a> </div> <div><span style="background-color:initial"><a href="/en/Staff/Pages/vinh-tu.aspx">Vinh Tu​</a> is </span><span style="background-color:initial">now a PhD student at the Divison of Material and Computational Mechanics</span><br /></div> <div><b><br /></b></div> <div><b>Supervisors:</b> Ralf Jänicke, Leif Asp, <span style="background-color:initial">Fredrik Larsson </span><span style="background-color:initial">and Kenneth Runesson, all from the Division of Material and Computational Mechanics, Department of Industrial and Materials Science​</span></div> <span></span><div></div></div> <div><br /></div> <div><div><b><a href="https://www.fems.org/">Learn more about FEMS</a></b> <em>Note: the web page isn't updated with the 2019's result yet.</em></div> <div><br /></div> <div><em>Text and photo: Carina Schultz</em></div> <div><div></div> </div></div></div>Thu, 12 Sep 2019 01:00:00 +0200https://www.chalmers.se/en/departments/ims/news/Pages/The-effect-of-workpiece-material-and-its-microstructure-on-tool-wear-in-metal-cutting.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/The-effect-of-workpiece-material-and-its-microstructure-on-tool-wear-in-metal-cutting.aspxThe effect of workpiece material and its microstructure on tool wear in metal cutting<p><b>​Philipp Hoier, Doctoral Student at Materials and manufacture​ IMS, defends his doctoral thesis on September 16, 2019.</b></p><strong>​Abstract</strong><div><div>In our everyday life we are frequently using different types of mechanical systems like automobiles, home appliances, or airplanes. Each system usually contains many individual components that have to work together properly so that the mechanical system as a whole functions. A modern aircraft engine, for example, contains about 18000 individual components. During manufacturing of most of the components, different metal cutting operations are used to cut the material (also called workpiece) into the desired shape. Obviously, the whole engine can only work safely and reliably if every single component has the exact right shape and dimension. Small deviations due to problems during the cutting processes can cause catastrophic failures during the service life of the aircraft engine. </div> <div>One problem that can arise during metal cutting operations is excessive wear of the tools that are used to cut the workpiece. In such a case, the component that is cut can be damaged and has to be scrapped since it cannot be applied for its purpose. This problem can be compared to cutting vegetables with a knife (your cutting tool) in your kitchen at home: After long cutting time and maybe depending on what types of vegetables you cut, the edge of your cutting tool can wear and get blunt. Instead of cutting precise slices of for example tomatoes, you will rather squish the tomato and get “damaged” slices with intolerable dimensions and properties. </div> <div>In order to avoid this problem during manufacturing of mechanical components, it is therefore important to know or predict when the cutting tool is too blunt to cut the workpiece precise enough. This is however difficult, because it is not well understood how the different constituents of the workpiece affect the wear of cutting tools. It is further complicated by the fact that workpieces can vary depending on their type and the producer. Similarly, the characteristics of a tomato (for example size and amount of hard seeds) can vary depending on what kind of tomatoes are used and where they were grown.</div> <div>This thesis aims at increasing the fundamental understanding of how the workpiece material and variations in its microstructure affect the wear of the tools used to cut it. This was achieved by controlled cutting tests during which the amount of tool wear was measured and compared when cutting different workpieces. Furthermore, the workpieces and worn cutting tools were studied at the microscopic scale to identify the mechanisms responsible for the wear. The gained knowledge can help to optimize the cutting process as it allows to predict how fast cutting tools wear down and when they have to be replaced. In that way the risk for having to scrap components can be reduced which is beneficial from an economical and an environmental standpoint and leads to more sustainable processing.</div> <div><br /></div></div> <div><a href="https://research.chalmers.se/en/publication/511696"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><a href="https://research.chalmers.se/en/person/?cid=hoierp"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More about Philipp Hoier</a></div> <div><br /></div>Tue, 10 Sep 2019 14:00:00 +0200https://www.chalmers.se/en/departments/ims/news/Pages/Modeling-and-experimental-characterization-of-large-biaxial-strains-and-induced-anisotropy-in-pearlitic-rail-steel.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Modeling-and-experimental-characterization-of-large-biaxial-strains-and-induced-anisotropy-in-pearlitic-rail-steel.aspxModeling and experimental characterization of large biaxial strains and induced anisotropy in pearlitic rail steel<p><b>​Knut Andreas Meyer, Doctoral Student at Material and Computational Mechanics​ IMS, defends his doctoral thesis on October 4th 2019.</b></p><div><b></b><span></span><div><b>Dissertation</b></div> <div>2019-10-04 09:00</div> <div>VDL, Chalmers Tvärgata 4C</div> <div>Opponent: Professor Odd Sture Hopperstad, NTNU, Norway</div></div> <strong><div><strong><br /></strong></div> Po​pular description</strong><div><div>Have you ever noticed how hard it is to bike with soft tires? What about how different it feels after you inflate them? The bike may roll more easily, but the bumps on the road are also more noticeable. The same happens for railway wheels: A steel wheel rolling over a steel rail has a very low rolling resistance. This makes trains very eco-friendly. The drawback, however, is a very high contact loading equivalent to the weight of 100 bikers on an area the size of a coin. This, together with forces from acceleration and braking, cause the surface layer of the rail to deform. As the deformations increase, the properties of the rail material change, and cracks appear. When the cracks become too large they need to be removed by maintenance grinding. This is a costly and slow operation that requires planning well in advance to avoid delayed trains. </div> <div> </div> <div>In this thesis, a new experimental method is presented. It is used to investigate how a material's properties are affected by large deformations. One important property is the yield limit. This is the maximum stress a material can withstand without permanently deforming. It is found that the yield limit is initially the same in all loading directions. After the deformations have accumulated, however, the yield limit depends on the loading direction. This effect is typically not accounted for when modeling the behavior of the rail material. Models that are capable of capturing this effect are therefore evaluated in this thesis. Such models can be used to optimize maintenance planning. Ultimately, our research should lead to smoother railway operations with fewer delayed trains.</div></div> <div><br /></div> <div><a href="https://research.chalmers.se/en/publication/512196"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><a href="https://research.chalmers.se/en/person/knutan"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More about Knut Andreas Meyer​</a></div> <div><br /></div> ​Tue, 10 Sep 2019 14:00:00 +0200https://www.chalmers.se/en/departments/ims/news/Pages/Physically-based-constitutive-models-for-crash-of-composites.aspxhttps://www.chalmers.se/en/departments/ims/news/Pages/Physically-based-constitutive-models-for-crash-of-composites.aspxPhysically based constitutive models for crash of composites<p><b>​Sergio Costa, new doctor at Material and Computational Mechanics​, Industrial and Materials Science.</b></p>​<span style="background-color:initial">We congratulates Sergio Costa, new doctor at the Division of Material and Computational Mechanics, IMS. </span><div><span style="background-color:initial">On September 6th he successfully defended his doctoral thesis ”Physically based constitutive models for crash of composites”. His research is focusing on compressive damage modes, matrix compression and fibre compression. Opponent was Pedro Camanho, University of Porto.</span><div><div><br /></div> <div>On the photo: Ragnar Larsson, examiner, Martin Fagerström supervisor, Pedro Camanho, University of Porto, opponent, Robin Olsson, supervisor and Sérgio Costa, PhD, together with the grading committee Karin Lundgren, Chalmers, Ulf Stigh, University of Skövde and Peter Gudmundson, KTH. (photo by Carina Schultz)</div> <div style="font-weight:bold"><br /></div></div> <div><strong><br /></strong></div> <div><strong>Abstract</strong><div><div>The transportation industry and passenger cars in particular are strong emitters of gases that contribute to the climate crisis. For this reason, the automotive industry investigates opportunities to reduce emissions, such as reducing the weight of the car. Composite materials, due to their high strength, stiffness and energy absorption to weight ratio, are a suitable material choice to reduce weight. The challenge here is that composites do not satisfy the fast development times and low costs required by the car industry. An efficient design phase, using more simulation and less physical testing, allows for time and cost-savings. However, there is a lack of efficient computational models to help the design with composite materials, which is fundamental for a widespread usage of composites in the automotive industry. This thesis presents the development, improvement and validation of constitutive models for composites in crash, focusing on compressive damage modes, matrix compression and fibre compression. The material being modelled is a carbon fibre/epoxy uni-weave Non-Crimp Fabric (NCF) composite. The properties of the composite constituents are homogenized to the ply level for a more efficient modelling.</div> <div><br /></div> <div>The matrix behaviour is modelled by combining damage and friction on the microcrack surfaces. The transverse mechanisms are modelled efficiently using a criterion for final failure, interaction of damage modes and a continuous response between compression and tension. The model is validated against 45- and 90-degree specimens. The fibre compression mode is fibre kinking growth, a very complex mechanism, responsible for high energy absorption. A homogenized 3D model based on Fibre Kinking Theory (FKT) is developed. It includes initial fibre misalignments and further rotations are governed by equilibrium with shear nonlinearity. The model is implemented in a commercial Finite Element (FE) software together with a mesh objective methodology. Furthermore, another formulation with similar physical principles but more suitable, efficient and robust for crash simulations is developed, implemented in an FE software and validated against experiments. The results show good qualitative and quantitative agreement. The proposed models allow for a reduction of physical testing required to develop crashworthy structures.</div></div> <div><br /></div> <div><a href="https://research.chalmers.se/en/person/?cid=sergioc"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more</a></div> <div><br /></div></div></div>Tue, 10 Sep 2019 14:00:00 +0200