The competence centre started as cooperation between the Chalmers University of Technology and DNV Inspection in 1998, financed by the Swedish NDT Qualification Centre, SQC. The idea was and still is to convert theoretical knowledge into applicable tools (e.g. simulation software) that can be used by people with mainly practical skills and experience within the non-destructive testing area (NDT). SCeNDT is composed of the research group Advanced NDT and complementary competences in present projects.
- Håkan Wirdelius, director, theoretical mechanics, MM UT/MM DRT
- Gert Persson, ass. Prof., theoretical mechanics, MM UT/FEM
- Kenneth Hamberg, ass. Prof., material science, Material/NDT
- Peter Hammersberg, ass. Prof., material science, POD/MM DRT
- Lars Hammar, graduate student, DRT/ ET
- Anders Rosell, graduate student, MM ET (VAC)
- Lars Larsson, graduate student, MM ET
- Erik Lindgren, graduate student, DRT
Surface and microstructure engineering
- Anders Boström, Prof., theoretical mechanics, MM UT
- Peter Bövik, ass. Prof., theoretical mechanics, MM UT/MM ET
- Per-Åke Jansson, ass. Prof., theoretical mechanics, MM UT
The European manufacturing industry is today facing the development of light weight components without reducing the product lifetime. Another challenge concerns the extension of the in-service life of components while increasing the level of reliability. Also safety aspects and that significant contribution of maintenance for component lifetime related production cost, has encouraged the development of non-destructive techniques to detect defects at an early stage. These new and stronger demands on reliability of non-destructive methods (NDT) and procedures have imposed different strategies to quantify the inspection capability. This has enforced the development of simulation tools of NDT methods in their applications. In addition to develop applied mathematical modelling tools of various conventional NDT technologies, a new research area is developed – Integrity and quality assessment by Non-Desctructive Evaluation (IqNDE). This area intends to evolve methodologies that incorporate non-destructive evaluation (NDE) and structural integrity together with lifetime assessment. This new area of research aims at an increase both in the amount of information within the output of the NDT technology and to put it into a quality context and thereby increase the economic value of the inspections.
Figure 1 Developed high definition x-ray technology.
ANDT – Advanced NDT
At the Department of Materials and Manufacturing Technology a research group, Advanced Non-Destructive Testing, is directly related to the nuclear power industry. The research is focused on theoretical knowledge-based techniques and methods for a number of NDT-methods (UT, RT and ET). Aging structures and the extension of the in-service life of components while increasing the level of safety are only achievable with a reliable and predictive maintenance. Different methods of risk informed in-service inspection (RI-ISI) are today widely in use within the nuclear industry in order to optimize in-service inspections efforts. One significant input to this estimation is the assumed initial defect size. As a consequence, a quantitative measure of inspection effectiveness is needed in determining the risk reduction associated with inspection. Relevant research areas with a probabilistic safety assessment approach are found in existing collaborations with the Department of Applied Mechanics; fracture mechanics, defect mechanics, fatigue testing capability at different temperatures and conditions and applied mathematical modeling of NDT.
Examples of Projects (previous, current and applied)
- “Initiation of the Simulation Center of NDT (SCeNDT)”, 1998-2004, (SQC).
- “The development of a high resolution X-ray system”, 2004-2007, (SSM and Swedish nuclear plant owners).
- “System för karakterisering av dendritorientering”, 2002-2007, (SSM/SQC/Chalmers).
- “Quantification of the reliability of flaw detection for NDT using probability of detection (POD) based on synthetic data”, 2008-2011, (Energimyndigheten)
- “PICASSO-imProved reliabIlity inspeCtion of Aeronautic structure through Simulation Supported POD”, 2009-2012, (EU-7)
- “ Detection and classification of defects with digital RT applied to laser welded titanium”, 2009-2012, (NFFP)
- “Upgrade of simSUNDT software”, 2011-2012, 970kSEK (SSM)
- “Characterisation and fatigue life prediction of laser welded titanium with single pores and chain porosity”, 2012-2013, (NFFP)
- “Product Uniformity Control”, 2013-2018, Research Fund for Coal and Steel (RFCS)
- “Model assisted probability of detection analysis for nondestructive evaluation of complex shaped parts”, 2013-2016, (NFFP)
- “Volumetric reconstruction of in-service defects based on limited view x-ray tomography”, 2013-2018, (VR)
- “Validation of a system for lifetime assessment of laser welded titanium components”, 2014-2015, (NFFP)
Figure 2 Simulation of ultrasonic grain boundary scattering.