News: Industrial and Materials Science related to Chalmers University of TechnologyThu, 04 Mar 2021 16:48:25 +0100 for planning Grants for 2021<p><b></b></p><div>​<span style="background-color:initial">The Production Area of Advance (AoA) management introduced the planning grants last year and will continue the distribution during 2021. The purpose is to give better opportunities to prepare for major research projects, or establish collaborations with other/various research disciplines, practice and users on international level. The grant is intended as support for creating larger projects that require additional efforts in preparation and not intended for normal project applications for national funding.</span></div> <div><span style="background-color:initial"><br /></span></div> <div><b>The planning grant within Production AoA is maximum SEK 50.000/project. </b></div> <div> </div> <h3 class="chalmersElement-H3">Application dates</h3> <div><span style="background-color:initial">The application will be open throughout 2021 with 3 cut-offs.: </span><b>31 March, 30 June</b> and <b>30 September 2021</b>. Send your application to Lars Nyborg with cc to Michael Eriksson (see below).</div> <h3 class="chalmersElement-H3">Application </h3> <div>Max 1 page including:</div> <div> </div> <div><ul><li>Motivation how the intended project if would contribute to the overall vision, mission and challenges of Production AoA</li> <div> </div> <li>Tentative consortium</li> <div> </div> <li>Call identifier (Vinnova, Horizon 2020/Horizon Europe, EIT Manufacturing, Formas, VR, Swedish Energy Agency)</li> <div> </div> <li>Any co-ordinated more prominent project initiation with IKEA would be eligible</li> <div> </div> <li><div>Any initiation of international co-operation that can be sustainable (note how long-term funding can be secured should be indicated)</div></li> <div> </div> <li><div>Budg<span>et (travel, meetings, etc.</span></div></li></ul></div> <h3 class="chalmersElement-H3"> </h3> <h3 class="chalmersElement-H3">Contact</h3> <div><span style="background-color:initial">Director </span><a href=""><span style="background-color:initial">Lars Nybor</span><span style="background-color:initial">g</span></a><span style="background-color:initial"> and </span><span style="background-color:initial"><a href="">Michael Eriksson</a></span></div> <div><span style="background-color:initial"><a href=""></a> </span></div> <div> </div>Thu, 04 Mar 2021 00:00:00 +0100 Panarotto - new Associate professor IMS<p><b>​​Massimo held his promotion lecture &quot;Multi-technology integrated products – can their value be assessed during design? &quot; for Associate professor &quot;oavlönad docent&quot; IMS on March 2, 2021.</b></p>​<img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/Massimo%20Panarotto.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><span style="background-color:initial">Massimo Panarotto, Researcher at Chalmers since 2017. His research is focused on developing value-driven models and methods to support the early stages of product development. The research is conducted in collaboration with companies in the space, aeronautics and automotive sectors. </span><span style="background-color:initial">He got his PhD in mechanical engineering from Blekinge Institute of Technology in 2015, and a degree in mechanical engineering from the University of Padua in 2011. Massimo</span><span style="background-color:initial"> is member of the Design Society and author of over 40 publications in the fields of systems engineering and engineering design. He has also taught more than 10 courses in the mechanical engineering and industrial economics degree programmes. </span><div><br /></div> <div><br /><span style="background-color:initial"></span><div><div><br /></div> <div><div><span style="font-weight:700">Abstract</span></div> <div>Product development projects frequently struggle in integrating new radical technologies (combining mechanical, electrical, and software elements) into innovative products that add value to the stakeholders. One of the reasons is that the value of new technologies is often compared “in isolation” (i.e., a new technology is compared in terms of how it improves the performances of an existing technology). Opportunities are missed for technologies which may present a lower level of performance compared to an existing technology, but that provide higher benefits when looking at the behaviour of the whole system over the lifecycle (e.g., in production, use or service). This is because novel technologies - of radical nature - establish new interactions and linkages with other elements of the system in ways that are unprecedent.  </div> <div>This presentation highlights, through real-life examples from product development projects, the difficulties of assessing value when new technologies from different domains are integrated into advanced products and systems. Also, the presentation describes how these difficulties can be solved through the application of value-driven design techniques, in which engineering-based models are combined with financial-based models to support collaborative decision-making during the early product development phases. </div></div> <div><br /></div> <div><a href="/en/Staff/Pages/massimo-panarotto.aspx" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />More about Massimo Panarotto</a></div> <div><br /></div></div></div>Tue, 02 Mar 2021 10:00:00 +0100 for ICT seed projects 2022<p><b>Call for proposals within ICT strategic areas and involving interdisciplinary approaches.​</b></p><h3 class="chalmersElement-H3">Important dates:</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><ul><li><b>Submission date: </b>April 29, 2021</li> <li><b>Notification:</b> mid-June, 2021</li> <li><b>Expected start of the project:</b> January 2022</li></ul></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">Background</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><b>The Information and Communication Technology (ICT) Area of Advance</b> (AoA) provides financial support for SEED projects, i.e., projects involving innovative ideas that can be a starting point for further collaborative research and joint funding applications. </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>We will prioritize research projects that <strong>involve researchers from different research communities</strong> (for example across ICT departments or between ICT and other Areas of Advances) and who have not worked together before (i.e., have no joint projects/publications). </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>Research projects involving a <strong>gender-balanced team and younger researchers</strong>, e.g., assistant professors, will be prioritized. Additionally, proposals related to <strong>sustainability</strong> and the UN Sustainable Development Goals are encouraged.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><b><em>Note: </em></b><em>Only researchers employed at Chalmers can apply and can be funded. PhD students cannot be supported by this call.  Applicants and co-applicants of research proposals funded in the 2020 and 2021 ICT SEED calls cannot apply. </em></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><em><br /></em></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><b>The total budget of the call is 1 MSEK.</b> We expect to fund 3-5 projects</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">Details of the call</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><ul><li>The project should include at least two researchers from different divisions at Chalmers (preferably two different departments) and who should have complementary expertise, and no joint projects/publications.</li> <li>Proposals involving teams with good gender balance and involving assistant professors will be prioritized.</li> <li>The project should contribute to sustainable development. </li> <li>The budget must be between 100 kSEK and 300 kSEK, including indirect costs (OH). The budget is mainly to cover personnel costs for Chalmers employees (but not PhD students). The budget cannot cover costs for equipment or travel costs to conferences/research visits. </li> <li>The project must start in early 2022 and should last 3-6 months. </li></ul></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">What must the application contain?</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>The application should be at most 3 pages long, font Times–roman, size 11. In addition, max 1 page can be used for references. Finally, an additional one-page CV of each one of the applicants must be included (max 4 CVs). Proposals that do not comply with this format will be desk rejected (no review process).</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>The proposal should include:</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>a)<span style="white-space:pre"> </span>project title </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>b)<span style="white-space:pre"> </span>name, e-mail, and affiliation (department, division) of the applicants</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>c)<span style="white-space:pre"> </span>the research challenges addressed and the objective of the project; interdisciplinary aspects should be highlighted; also the applicant should discuss how the project contributes to sustainable development, preferably in relation to the <a href="" title="link to UN webpage">UN Sustainable Development Goals (SDG)</a>. Try to be specific and list the targets within each Goal that are addressed by your project.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>d)<span style="white-space:pre"> </span>the project description </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>e)<span style="white-space:pre"> </span>the expected outcome (including dissemination plan) and the plan for further research and funding acquisition</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>f)<span style="white-space:pre"> </span>the project participants and the planned efforts</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>g)<span style="white-space:pre"> </span>the project budget and activity timeline
</div> <div><div><br /></div> <h3 class="chalmersElement-H3">Evaluation Criteria</h3> <div><ul><li>Team composition</li> <li>Interdisciplinarity</li> <li>Novelty</li> <li>Relevance to AoA ICT and Chalmers research strategy as well as to SDG</li> <li>Dissemination plan</li> <li>Potential for further research and joint funding applications</li> <li>Budget and project feasibility​</li></ul></div></div> <div><span style="color:rgb(33, 33, 33);font-family:inherit;font-size:16px;font-weight:600;background-color:initial"><br /></span></div> <div><span style="color:rgb(33, 33, 33);font-family:inherit;font-size:16px;font-weight:600;background-color:initial">Submission</span></div> <div> </div> <div> </div> <div> </div> <div>The application should be submitted as one PDF document to</div> <div> </div> <div> </div> <div> </div> <p class="chalmersElement-P"><span><span lang="EN-GB"><a href=""></a></span></span></p> <p class="chalmersElement-P"><span><br /></span></p> <div> </div> <p class="chalmersElement-P"> </p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><span style="background-color:initial">The proposals will be evaluated by the AoA ICT management group and selected Chalmers researchers.

</span></div> <div><span style="background-color:initial"><b><br /></b></span></div> <div><span style="background-color:initial"><b>Questions</b> can be addressed to <a href="">Erik Ström</a> or <a href="">Giuseppe Durisi​</a> </span></div> <div> </div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial">General information about the ICT Area of Advance can be found at <a href="/en/areas-of-advance/ict/Pages/default.aspx"> ​</a></span><br /></div> <div> </div> <div><span style="background-color:initial"><br /></span></div> <div> </div> <div><img src="/SiteCollectionImages/Areas%20of%20Advance/Information%20and%20Communication%20Technology/About%20us/IKT_logo_600px.jpg" alt="" /><span style="background-color:initial">​​<br /></span></div>Mon, 01 Mar 2021 00:00:00 +0100 Modelling of Vibratory Screens<p><b>​Ali Davoodi, Doctoral Student at Product Development IMS, defends his doctoral thesis.  Ali is part of the Chalmers Rock Processing Research (CRPR)​ group. The research  is fokused on machines and systems for the production of crushed rock materials. Applications can be found within the mining and mineral industry and the aggregate production. CRPR is internationally acknowledged within modelling of performance and wear in cone crushers, modelling of screens and optimization of crushing plants facilities.​</b></p><strong>Popular science summary</strong>​<div><span style="background-color:initial">What is trending today? Of course, it is sustainability in society concerning the resources we consume as humans. One such resource is aggregates and minerals products, which is the foundation of infrastructure development. Looking at the statistics, the consumption of aggregates in Sweden is about 100 million tons every year, consisting of approximately 90% crushed rock.</span></div> <div><br /><span style="background-color:initial"></span><div>To produce aggregates, the rock material needs to be crushed and screened in different stages, which are often high energy-consuming processes. One way to minimize energy consumption is to improve production efficiency. This can be done by analyzing data from the operation and using different simulation platforms to improve equipment utilization.</div> <div>One of the main classification processes applied in the industry is screening with vibratory screens. A vibratory screen’s main functionality is particle separation, which is a function of gravity, the properties of the granular material, equipment geometry, and the screen’s relative motion. Discrete Element Method (DEM) has been used to study particle behaviour and it is a suitable tool for studying the screening performance. The particle-to-particle and particle-to-geometry interaction can be studied using DEM in a way that is impossible to achieve with physical experiments.</div> <span style="background-color:initial">By using DEM simulation, the fundamental understanding of how to improve screening efficiency can be expanded. The advantage of using simulations instead of experiments to improve screening performance is minimizing cost and energy consumption which is one step toward sustainability. Another advantage is that DEM simulations provide practical feedback when designing the vibratory screen. This allows the designer to determine the correctness and efficiency of a design before the screen is constructed.</span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"><div><strong>Public defence</strong></div> <div>2021-03-19 09:00 -- 12:00</div> <div>Examiner: Magnus Evertsson, IMS</div> <div>Opponent: Peter Radziszewski, McGill University</div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to defence</a></div> <div><span></span><a href="" target="_blank">​</a><span style="font-family:calibri, sans-serif;font-size:11pt;background-color:initial">Password: 586970</span><a href="" target="_blank">​</a></div></span><span style="background-color:initial"> <div><br /></div> <div><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Ali Davoodi on Linkedin</a><a href="" target="_blank"></a></div> <div><br /></div></span></div> <div><span style="background-color:initial"><br /></span></div> ​Tue, 23 Feb 2021 00:00:00 +0100 individualization: The future of production for a higher level of quality.<p><b>​Abolfazl Rezaei Aderiani, Doctoral Student at Product Development IMS, defends his doctoral thesis. He works in the Geometry assurance and robust design research group. The focus field of his research is improving the geometrical quality of complex non-rigid sheet metal assemblies by means of a Smart Assembly line.Online presentation.</b></p><div><strong style="background-color:initial">Popular science description​</strong><br /></div> <div><span style="background-color:initial">A principle challenge in production is geometrical deviations of the produced products from the designed product. The functionality and aesthetic qualities of the product can be affected by these deviations besides the additional costs that they impose on the production. These deviations can be reduced by employing higher quality production machines and tools, but this solution increases the production cost and may not be reasonable. </span><div>Traditionally the deviations of production have been treated as uncertainties and noises. Therefore, most of the solutions have focused on minimizing the sensitivity of produced products to these noises. However, thanks to robotized production lines, scanning technologies, and machine learning techniques, a new opportunity has arisen to identify and treat these deviations for every product individually. </div> <div>The geometrical deviation of each part can be scanned by taking several pictures of the parts. This thesis evaluates the means of utilizing the scanned forms to achieve the highest geometrical quality in non-rigid assemblies. These assemblies are ubiquitous in the automotive and aerospace industries. Predicting behaviors of non-rigid assemblies is far more complicated than rigid assemblies due to the variety of factors involved. </div> <div>Two techniques of selective assembly and individualized locator adjustments are developed and evaluated to be used in individualizing the assembly process of sheet metal assemblies. The results manifest the techniques developed are promising in achieving a significant geometrical quality improvement. </div> <div>The effects of other production factors including the assembly fixtures are evaluated on the potential improvements. Thus, the improvements can further increase by the specific design of fixtures for individualized assembly processes. </div> <div><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the thesis</a></div> <div><br /></div> <div><b>Public thesis defence</b></div> <div><div>2021-03-12 14:00 -- 17:00</div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to presentation, Zoom </a></div> <div>(Passcode: 493098)</div> <div>Examiner: Rikard Söderberg, IMS</div> <div>Opponent: Professor Darek Ceglarek, University of Warwick, United Kingdom.</div></div> <div><br /></div> <div><a href="/sv/personal/redigera/Sidor/aderiani.aspx" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />​<span style="background-color:initial">Abolfazl Rezaei Aderiani, Chalmers</span></a><br /></div> <div><span style="background-color:initial"><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />LinkedIn</a></span></div> <div><span style="background-color:initial"><br /></span></div> <div>​<br /></div> </div>Fri, 12 Feb 2021 10:00:00 +0100 methods for dealing with deformation in virtual product realization<p><b>​Tomas Hermansson, Product Development IMS, defends his doctoral thesis. Tomas is an industrial doctoral student from Fraunhofer-Chalmers Centre. In his thesis he presents new methods for design, verification and planning that take special account of the deformation of cables and hoses.Online presentation. ​</b></p><strong>​Popular science description</strong><div><span style="background-color:initial">In the industry of today, virtual tools are widely used in the realization of a new product. As quality problems and late changes in the design and the production of the product can be extremely costly, much can be gained from discovering and addressing problems as early as possible using simulation. This holds specifically true when deformable 1D objects, such as electrical cables and hydraulic hoses, are involved. These types of objects are slender, or one-dimensional (1D), and are usually significantly deformed when subject to external forces and moments. This may cause quality problems and unexpected contact with other objects during both the production and the life-span of a product. </span><div><br /></div> <div>This thesis presents a set of novel methods for virtual design, planning and verification regarding deformable 1D objects. The methods allow for automatically finding a routed design of the object, verifying the routed design with respect to both geometrical variation and assembly and improving operations in production with respect to deformation. The methods rely on an efficient simulation model based on rod theory for computing deformations in accurate agreement with reality. As a result, the methods are today used at several global companies in the automotive industry, including Volvo Cars, BMW and Ford Motor Company. Together with existing virtual tools, they contribute to shorter development times, fewer physical prototypes and production test series and, in the end, a product of a higher quality.</div> <div><br /></div> <div><div><strong>Public defence</strong></div> <div>2021-03-26 09:00 -- 13:30</div> <div>Examiner: Rikard Söderberg, IMS</div> <div>Opponent: Dr. Sotiris Makris, Department of Mechanical Engineering and Aeronautics, University of Patras, Greece</div></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to presentation</a></div> <div><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to the thesis</a><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Tomas on LinkedIn</a><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Fraunhofer-Chalmers Centre</a></div> <div><a href="/en/departments/ims/research/product-development/Pages/default.aspx" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Product Development IMS</a></div> <div><br /></div></div> ​Mon, 08 Feb 2021 00:00:00 +0100 process gases for laser powder bed fusion<p><b>​Camille Pauzon, Doctoral Student at Materials and manufacture​ IMS, defends her doctoral thesis. In her research she focuses on Additive Manufacturing. Online presentation.</b></p><strong>​</strong><span style="background-color:initial"><strong>Popular Science Summary</strong></span><div>Significant growth of additive manufacturing, also called 3D printing, during the last decade, caught the attention of various industrial segments and disrupted traditional manufacturing approaches. Complex-shape high-performance components can be produced with geometries not feasible using conventional manufacturing technologies, with high material utilization and short time-to-market. Several technological solutions under the additive manufacturing umbrella allow for the processing of many different materials, from metals to polymers and composites.</div> <div>In metal additive manufacturing, laser powder bed fusion (L-PBF) represented the largest share of the market, approaching 10000 systems installed worldwide. The most popular materials are Ti-6Al-4V, stainless steels, and nickel-based alloys, followed closely by aluminium alloys. This process uses the energy from a laser to selectively melt a bed of powder particles of tens of microns in size, slightly smaller than a human hair. This step is repeated in a layer-wise manner to build a 3D component. Great effort is devoted to developing robust L-PBF process and the material portfolio to address a wide range of applications. Integration of additive manufacturing within industrial production schemes, making it an economically interesting manufacturing alternative, is another important challenge nowadays. This demand is also associated with the need for productivity increases and material properties’ control. In this context, gaining a better understanding of the physical phenomena involved during L-PBF and optimizing the process is necessary. </div> <div>This thesis focuses on the effect of the process atmosphere on the interaction between laser and powder bed and the resulting microstructure, process stability and productivity, as well as, spatter formation and their characteristics. Typically argon or nitrogen are used as processing gases, filling the process chamber where the laser scans the powder bed. This variable, the process gas, has been largely neglected in favour of first order parameters, such as the laser power or speed. This work demonstrates a strong influence of both the type of gas and the purity achieved in the process chamber on the microstructure and properties of the produced material, as well as, the powder exposed to the processing conditions. In addition, the results highlight that guidelines associated with the process atmosphere have to be formulated considering the sensitivity of the alloy produced. Furthermore, helium and argon-helium mixtures were investigated as an approach to stabilize the process and showed potential toward increasing process stability, allowing to increase build rates and thus productivity.</div> <div><br /></div> <div><div><span style="font-weight:700">Public defence</span></div> <div>2021-03-25 09:00</div> <div>Examiner: Lars Nyborg, IMS</div> <div>Opponent: ​Professor Eric Jägle, Institute of Materials Science, University of Bundeswher, Munich , Germany​</div></div> <div>Link to presentation: TBA</div> <div><br /></div> <div><b><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more</a></b></div> <div><br /></div> <div><br /></div>Thu, 04 Feb 2021 00:00:00 +0100 geometrical quality with joining sequences<p><b>​Roham Sadeghi Tabar, Doctoral Student at Product Development​ IMS, defends his doctoral thesis. His research interests are in the fields of Geometry Assurance, Computer-Aided Tolerancing, and Optimization.Online presentation.</b></p><strong>​</strong><span style="background-color:initial"><strong>Abstract</strong></span><div><span style="background-color:initial">Disturbances in the manufacturing and assembly process cause functional and aesthetic problems in the products. Being able to control the disturbances in real-time is the desire of the manufacturing industry to improve quality and reduce waste and costs. </span><div>Joining processes is one of the crucial elements imposing geometrical inaccuracies to the assemblies. The geometrical outcome of the assemblies are predicted using simulations as the costs and material waste do not allow for physical experimentation.</div> <div>An assembly often consists of several joined parts. The joining sequences impact the geometrical quality considerably. To simulate all the possible alternatives for joining sequences for finding the optimal answer is computationally heavy and expensive.</div> <div>In this thesis, methods for identifying the optimal joining sequences time-efficiently and accurately are studied. Initially, a rule-based approach is put forward to increase the efficiency of the previously applied algorithms. The joining sequence-quality behavior is approximated using black-box models,  enabling parallel evaluations of the geometrical quality. Based on this finding, a search algorithm for rapid identification of the optimal sequence is presented. Furthermore, a numerical approach to identify the number, location, and sequence of the critical joining points for geometrical quality is introduced. Finally, an efficient simulation approach for evaluating the geometrical quality is proposed.</div> <div>The results achieved from the studies presented indicate that the simulation-based real-time optimization of the joining sequences is achievable through a parallelized search algorithm and a rapid evaluation of the sequences. The results help control the assembly process, improve the geometrical quality, and save significant computational time.</div> <div><br /></div> <div><div><strong>Public defence</strong></div> <div>2021-03-04 14:00 -- 17:00</div> <div>​Examiner: Rikard Söderberg IMS​<br /></div> <div>Opponent: Professor Jamie Camelio, University of Georgia, United States</div></div> <div><br /></div> <div><div><a href="" target="_blank" style="outline:0px"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to presentation, zoom​</a></div> <div>Password: 713233​</div></div> <div><br /></div> <div><strong>Contact Roham</strong></div> <div><div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Chalmers profile</a></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Linkedin profile</a></div> <div><br /></div> <div><br /></div></div> <div><br /></div></div> ​Tue, 02 Feb 2021 10:00:00 +0100 plastics in the open environment<p><b>​Plastic pollution is a worldwide problem and biodegradable plastics can play a part to reduce the waste. But there is a risk that the term biodegradable plastics can lead to confusion for policymakers and customers, since most biodegradable plastics are designed to degrade only in special industrial composting facilities. A report has now been published that gives a scientific view on the use of biodegradable plastics in the open environment.</b></p><div>​Biodegradable plastics can only help solving the growing plastic waste problem if it’s handled the way it was designed. A perspective here is to label as biodegradable if it can be fully broken down by microorganism. Such full biodegradability is not always the case with conventional biodegradable plastics. The effectiveness of biodegradable plastics is highly dependent on the environmental conditions. If the necessary microorganisms and other circumstances such as the right temperature is missing, then the plastic will not degrade in a reasonable time period. Most biodegradable plastics today cannot just be left in an open environment for degradation. So, it is very important to understand that biodegradable plastic will not automatically solve the plastic waste problem, but it can be part of the solution if managed correctly.</div> <div> </div> <h2 class="chalmersElement-H2">Policy recommendations on biodegradable plastics</h2> <div> </div> <div> The report <a href="">Biodegradability of Plastics in the Open Environment</a>, written by a Group of Chief Scientific Advisors based on scientific evidence reviewed by the Science Advice for Policy by European Academies, gives several policy recommendations. First is limiting the use of biodegradable plastics in the open environment to specific applications for which reduction, reuse, and recycling are not feasible. Second, the report wants to see support for the development of coherent testing and certification standards for biodegradation of plastics in the open environment. Thirdly it is also necessary to promote the supply of accurate information on the properties, appropriate use and disposal, and limitations of biodegradable plastic to relevant user groups.</div> <div> </div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/IMS/Konstruktionsmaterial/AntalBoldizar.jpg" alt="Antal Boldizar" class="chalmersPosition-FloatLeft" style="margin:5px 20px;width:167px;height:209px" />Professor <a href="/en/Staff/Pages/antal-boldizar.aspx">Antal Boldizar</a>, researching on environmentally adapted engineering polymers at Chalmers University of Technology, is one of the working group members in the advisory board that produced the report.</div> <div><br /></div> <div> </div> <div><em>Who do you think should read this report and why?</em></div> <div><span style="font-size:11pt;line-height:107%;font-family:calibri, sans-serif">– </span>As this report gives a rather broad perspective on the aspects of biodegradable plastics, I think it could be of general interest for many readers. The specific purpose was, however, to give a scientific input to the European Commission as a support for a new framework on biodegradable plastics, says Antal Boldizar.</div> <div><br /></div> <div> </div> <div><em>What is the most important thing to think of when it comes to biodegradable plastic, in your opinion?</em></div> <div> <span style="font-size:11pt;line-height:107%;font-family:calibri, sans-serif">– </span>The most important message, I think, is that biodegradable plastics have a role to play in reducing the accumulating of plastics in the open environment — but only in some specific applications. In other cases, including single-use packaging and plastic bags, it would likely be better to reduce the amount of plastic we use, to re-use it, recycle it, or, where we can, compost it in industrial plants, says Antal.</div> <div> </div> <h2 class="chalmersElement-H2">About SAPEA</h2> <div><span><a href="">SAPEA</a> is part of the European Commission’s Scientific Advice Mechanism.<span> </span></span>The report is part of the Scientific Advice Mechanism that gives independent scientific advice to the European Commission. </div> <div> </div> <div>SAPEA has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement 737432</div> <div> </div> <div> </div>Fri, 29 Jan 2021 08:30:00 +0100 lifecycle cost-driven approach for adaptable design optimization of additively manufactured components<p><b>​Lydia Lawand, McGill University in Montreal, Canada, defends her doctoral thesis where she presents three methods that support design decision-making while considering the potential use of new technologies in addressing changing requirements throughout a component&#39;s life. The work has been done in collaboration with GKN Aerospace in Trollhättan and the division of Systems Engineering Design​, IMS Chalmers.</b></p>​<div><img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/Lydia%20Lawand/Lydia%20at%20iced.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Lydia Lawand is a doctoral student at the department of mechanical engineering at McGill University in Montreal, Canada. Lydia is a part of the Systems Optimization Lab headed by Prof. Michael Kokkolaras. Lydia has been working on industrial research since the beginning of her graduate studies as a master’s student. During her PhD and under the supervision of Prof. Michael Kokkolaras, Lydia worked closely with GKN Aerospace in Trollhättan to develop design strategies to address the aerospace industry’s needs for adaptable parts that satisfy changing requirements in an economic manner. Additive manufacturing was a key enabler of these methods. Through his great experience and connections in the industry, Prof. Ola Isaksson at Chalmers provided the support and resources needed for Lydia to work closely with GKN. This has helped broaden her knowledge about the inner workings of the aerospace industry. Prof. Isaksson’s team of researchers at the Systems Engineering Design research group at the department of Industrial and Materials Science, hosted Lydia for the summers of 2017, 2018, and 2019 resulting in several publications and successful technology transfers at GKN aerospace. Lydia’s research interests are in the area of design optimization, lifecycle cost modeling, system dynamics, and design for changeability.<div><br /></div> <div><span style="font-weight:700">Abstract​</span><br /><div><div>The thesis presents a design decision framework for assessing alternative manufacturing and remanufacturing strategies from both technical and business perspectives. The proposed methods enable such considerations in the early product design phases, where a sufficient degree of freedom exists to identify component design solutions that can accommodate dynamic requirements throughout a product's life.</div> <div><br /></div> <div>The first method presented in this thesis considers the potential use of additive manufacturing in life extension strategies by examining the impact of design decisions on component lifecycle cost. An optimization problem is formulated and solved to minimize lifecycle cost with respect to design variables related to remanufacturing.</div> <div><br /></div> <div>The second design decision method proposed enables the consideration of a design margins approach to satisfy changing requirements through optimizing component lifespan for different lifecycle scenarios. A dynamic lifecycle cost model that considers additive remanufacturing to quantify corresponding costs and benefits is developed. A nested design optimization problem is then formulated to determine the optimal component lifespan range that minimizes overall cost while maximizing performance. The proposed methods are demonstrated using a turbine rear structure, an aeroengine structural load-bearing component. The life extension of the turbine rear structure is achieved through the additive deposition of a circumferential stiffener on the outer casing. </div> <div><br /></div> <div>Design and manufacturing scenarios have a significant impact on the efficiency of the manufacturing process. Therefore, an integrated design-manufacturing decision metric is proposed to allow assessment of products based on both the geometrical information obtained from a part’s computer aided design file and its manufacturing scenario. The developed metric can be used as a proxy of build time and manufacturing cost assisting in the product’s design optimization and development processes. Two examples of jet engine components are used to illustrate the use and benefits of the proposed decision metric.</div> <div><br /></div> <div>The three presented methods support design decision-making while considering the potential use of new technologies in addressing changing requirements throughout a component's life.</div> <div><br /></div> <div><strong>Public defence</strong></div> <div>Thesis Supervisor: Prof. Michael Kokkolaras</div> <div>Date: March 1, 2021</div> <div><div>Unfortunately the defense will not be broadcasted on Youtube as planned. <span style="background-color:initial">​</span></div></div></div> <div><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Contact Lydia Lawand</a></div> <div><br /></div> <div><div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More about the Department of Mechanical Engineering, <span style="background-color:initial">McGill University</span></a></div> <div><a href="/en/departments/ims/research/product-development/Pages/systems-engineering-design.aspx" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" /><span style="background-color:initial">More about the Division of </span><span style="background-color:initial">Systems Engineering Design, IMS​</span></a></div></div> <div><br /></div></div></div> ​​Thu, 28 Jan 2021 00:00:00 +0100 throughput bottleneck analysis in production systems<p><b>​Mukund Subramaniyan, Production Systems​ IMS, new doctor IMS.</b></p><strong>​</strong><div><span style="background-color:initial"><strong><img src="/SiteCollectionImages/Institutioner/IMS/Produktionssystem/Abstract%20Figure_Thesis%20web.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><br /><br /><br /></strong></span></div> <div><span style="background-color:initial">Summary figure: &quot;</span><span style="background-color:initial">Data-driven throughput bottleneck analysis in production systems&quot;</span></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><br /></div> <div><span style="background-color:initial"><strong><br /></strong></span></div> <div><strong></strong><span style="background-color:initial"><strong>Public defence - </strong></span><b><span></span>Mukund Subramaniyan​</b><div>2021-02-12 10:00</div> <div>Opponent: Amos Ng, University of Skövde, Sweden</div> <div>Examiner: Johan Stahre, IMS</div> <div><br /></div> <div><strong style="background-color:initial">Popular science text</strong><br /></div> <div> <div>My thesis offers a series of data-driven solutions that can provide a multifold increase to a company's bottom line by eliminating throughput bottlenecks in the factory. Today manufacturing companies' factory floor productivity is alarmingly low at 50%. Practitioners are exploring new ways to increase factory floor productivity. One way to increase productivity is to get higher factory throughput. Some machines constraints the throughput on the factory floor. These machines are called throughput bottlenecks. When practitioners eliminate throughput bottlenecks, they can get higher throughput. But how can practitioners find, analyze, and eliminate throughput bottlenecks? Currently, practitioners spend a lot of time (sometimes hours or days) on the shop floor to search for bottlenecks and make ambiguous experience-based decisions. But this can be changed using digital solutions. How? My research answers this question. In my thesis, I build data-driven approaches to analyze throughput bottlenecks in less than seconds. The input to a data-driven approach is digital machine data. Then, the data-driven approach quickly analyses the digital data using artificial intelligence techniques. The outputs of a data-driven approach are the insights on throughput bottlenecks.</div> <div><br /></div> <div>Within the thesis, I propose four data-driven approaches for different types of throughput bottleneck analysis. First, I present different data-driven approaches to identify historical throughput bottlenecks. With these, practitioners can quickly identify the bottleneck location in a production system. Second, I propose a data-driven approach to diagnosing historical throughput bottlenecks. It will help to understand the possible root-causes of the throughput bottlenecks. Third, I offer a data-driven approach to predict throughput bottlenecks for the next production day. It will help to take proactive actions on throughput bottlenecks. Fourth, I propose a data-driven approach to prescribe actions on predicted throughput bottlenecks. It will give information on specific measures one can proactively perform on predicted throughput bottlenecks. In sum, these data-driven approaches will help practitioners to make faster, confident, and informed decisions on throughput bottlenecks, which will help to maximize the throughput from production systems.</div> <div><br /></div> <div>Overall, data-driven approaches are similar to GPS. People use GPS to find the best way. The GPS eliminates blind alleys. Similarly, practitioners can use data-driven approaches to eliminate throughput bottlenecks and create a more predictable and better factory environment without surprises.</div> <div><br /></div></div></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more​</a></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Mukund on Linkedin</a></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />​</a><br /></div> <div><br /></div> ​Mon, 18 Jan 2021 00:00:00 +0100 and properties of thermoplastic composites based on ethylene-acrylic acid copolymer reinforced with wood nanocellulose<p><b>​Abhijit Venkatesh, Doctoral Student at Engineering Materials​ IMS, defends his doctoral thesis. On-line defence.</b></p><strong>​</strong><span style="background-color:initial"><strong>Public defence</strong></span><div>2021-01-22 10:00</div> <div>Opponent: Professor Mikael Hedenqvist, Kungl. Tekniska Högskolan (KTH), Stockholm, Sweden</div> <div>Examiner: Antal Boldizar, IMS</div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Link to defence</a></div> <div><br /></div> <div><strong>Popular science description</strong></div> <div><div>The societal efforts to move towards a more sustainable future has resulted in the search for bio-based, biodegradable and renewable replacements among which cellulose is also being explored as a possible option. The main source of cellulose are plants and trees, with a global annual synthesis of 100 billion tons, and hence abundantly available in nature. Cellulosic materials are also biodegradable, renewable, inexpensive and have been used as structural material for centuries while still covering a large part of the industries like paper, forest products, textiles, etc. Sweden has always used cellulose as raw materials in various applications and with the stricter regulations from EU, the industries are opting for more sustainable materials/solutions. This has worked in the favour of wood-based materials which can be used as an inexpensive reinforcing material in thermoplastic composites.</div> <div>A composite material contains two (matrix and reinforcement) or more (additives) components that are combined to obtain a material with properties different than the individual components. Wood is nature’s composite where lignin is the matrix and cellulose are the reinforcement. The reinforcement provides structural integrity and improves the properties, which is exactly what cellulose does in trees and plants.  In wood-polymer composites, the cellulose has been used as reinforcement, for decades, to strengthen the polymer matrix. However, an interest has been rekindled due to advancements in cellulose production technology which helps in commercially obtaining nano-sized cellulose reinforcements. Here, the nanocellulose is expected to improve the reinforcing capabilities more than the larger fibers, due to their excellent mechanical properties, resulting in composites with high strength and stiffness.</div> <div>Despite the favourable properties of nanocellulose, it has a major drawback when used as reinforcement in thermoplastics, due to its relatively hydrophilic nature when compared to the usually hydrophobic polymer matrix, which drastically affect the properties. In addition, the main method of producing nanocellulose composites has been through laboratory scale methods and to make the production of nanocellulose composites commercially interesting  on an industrial scale, the feasibility with conventional melt processing technique should be considered. The results from this work helps us improve the understanding of melt processing of cellulose nanocomposites and highlight the importance of process details. It also highlights the possibility of upscaling the production while analysing its impact on nanocellulose modification and the different types of melt processing techniques. In this work, depending on the type of processing method and the hierarchical structure of the cellulose reinforcements used, the composites exhibited an increase in stiffness of up to 21 times than that of the polymer matrix.</div></div> <div><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more</a></div> <div><br /></div> <div><a href="" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />​Abhijit Venkatesh​ Linkedin</a><br /></div> <div><br /></div>Mon, 11 Jan 2021 00:00:00 +0100 Wärmefjord new professor in Product and Production development<p><b>Kristina Wärmefjord  gave her lecture &quot;Geometry assurance and non-rigid variation simulation​&quot; for professor  (Swedish: biträdande professor) on January 21, 2021.​</b></p>​<img src="/SiteCollectionImages/Institutioner/IMS/Övriga/div%20nyheter%20o%20kalender/Kristina%20W%20kalendarium.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" /><br /><br /><span style="font-weight:700;background-color:initial">Title</span><div class="text-normal page-content"><div>Geometry assurance and non-rigid variation simulation</div> <div><br /></div> <div><span style="font-weight:700">Abstract</span></div> <div>Geometry assurance is a way to achieve high quality products, by reducing the effect of variation in design and production. The presentation will introduce the area and highlight research challenges and solutions mainly focusing on statistical non-rigid variation simulation. For non-rigid variation simulation, Monte Carlo simulation is combined with finite element analysis the behavior of compliant components and assemblies. The simulation needs to capture how part variation propagates through an assembly, and how the fixturing and joining processes affect the result. To achieve high accuracy in the simulation as many as possible of the phenomena affecting the result in reality must be included, while keeping simulation time down. Also aspect such as a digital twin for geometry assurance and the digital thread supporting a digital twin setup will be discussed, as well as future research areas and an outlook on important topics in tolerancing and geometry assurance.</div> <div><br /></div> <div><a href="/en/staff/Pages/kristina-warmefjord.aspx" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />More about Kristina Wärmefjord​</a><br /></div> <div><br /></div></div> ​Mon, 21 Dec 2020 00:00:00 +0100 to infrastructure related to metals and production<p><b></b></p>​<div><span style="background-color:initial">The Swedish Research Council has decided on the applications to be awarded grants within &quot;<b>Grant for</b> <b>accessibility to infrastructure&quot;</b>. They received 41 applications, of which 11 have received grants from a total amount for 2020-2024 of 80 million SEK.</span><span style="background-color:initial">​</span><div><div><br /></div> <p class="chalmersElement-P">The Chalmers Production Area of Advance is part of a application together with Lunds University, via <span>Anders Mikkelsen, </span><span style="background-color:initial">Professor at Synchrotron Radiation Research. The project title is &quot;</span><span></span><span style="background-color:initial">Metals and production @ </span><span style="background-color:initial">the next generation of sources: Bridging the gap from basic science to production for the metal and production industry&quot;. The research subject areas are </span><span style="background-color:initial">composite materials and technology, machining and surface technology and participating from Chalmers is <b>Lars Nyborg</b> and <b>Uta Klement</b>.</span></p> <span></span><div></div> <div></div> <div>​<br /></div> <span style="background-color:initial"></span></div> <div><span style="background-color:initial"><em><strong>The background:</strong></em></span></div> <div><span style="background-color:initial"><em>The Swedish Research Council (Vetenskapsrådet) was mandated by the Government to work towards ensuring researchers based in Sweden participate to a greater degree in the construction and development of research infrastructure, and towards making research infrastructure more accessible and more used by the business and public sectors.</em></span><br /></div> <div><div><br /></div> <div><a href="" target="_blank" title="Link to VR web"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />See approved grants</a></div> <div><br /></div></div></div> ​Thu, 26 Nov 2020 10:00:00 +0100 article in record time<p><b>​An article produced by researchers related to Wingquist Laboratory is the most-read article ever, and in the record time of 14 months. The subject of interest: Perceived Quality.</b></p><div><div><span style="background-color:initial"><img src="/en/centres/wingquist/PublishingImages/Journal%20of%20Engineering%20Design.png" alt="Screenshot of the journal" class="chalmersPosition-FloatRight" style="margin:5px;width:281px;height:306px" /><br /><br />The research paper &quot;Perceived Quality of Products: a Framework and Attributes Ranking Method has drawn a lot of attention. It recently became the the most-read article in the Journal of Engineering Design since they started measurements in 2011. </span><br /></div></div> <div><br /></div> <div>Authors are Professor <b><a href="/en/Staff/Pages/rikard-soderberg.aspx" title="link to profil page">Rikard Söderberg</a></b>, and Dr. <b><a href="/en/staff/Pages/stylidis.aspx" title="link to profil page">Kostas Stylidis</a></b>, from the Department of Industrial and Materials Science, Chalmers University of Technology, together with Dr. <b><a href="">Casper Wickman​</a></b>, Volvo Cars. </div> <div><br /></div> <div>The rapid growth of interest in the <b>Perceived Quality </b>research indicates that the industry and academia recognized and accepted the proposed paradigm shift, making the vision of Geometry Assurance and Robust Design research group a new standard in this area.</div> <div><br /></div> <div>The <b>Journal of Engineering Design</b> is a leading international publication that provides an essential forum for dialogue on important issues across all disciplines and aspects of the design of engineered products and systems.</div> <div><br /></div> <div><a href="" target="_blank" title="link to article"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the article​</a></div> ​Thu, 26 Nov 2020 09:00:00 +0100