Plenary Lectures

Speaker: Prof. F. Barlat (POSTECH, Republic of Korea)

Dr. Barlat is full professor at the Pohang University of Science and Technology (POSTECH) in the Republic of Korea. He is the director of the Material Mechanics Laboratory at the Graduate Institute of Ferrous Technology (GIFT). His research focuses on the development of innovative plasticity theories for metals, as well as forming process and manufacturing technologies for steel products. Professor Barlat is associate editor for International Journal of Material Forming, and Modeling and Simulations in Materials Science and Engineering. He was the chairman of the 10th NUMIFORM conference, which was held in 2010 on POSTECH Campus. He published over 200 articles in peer-reviewed scientific journals and received a number of awards, in particular, the Khan International Medal for outstanding life-long contributions to the field of Plasticity.

Title: Advanced Constitutive Modeling and Application to Industrial Forming Processes

Author: F. Barlat (POSTECH) and Dong-Jin Kim (POSCO)

Abstract: Continuum constitutive descriptions of plasticity suitable for finite element simulations of sheet forming processes are succinctly discussed in this presentation. Although multi-scale approaches allow for a more explicit representation of the physical deformation mechanisms occurring at microscopic scales, they are usually not suitable for industrial applications because of the quick turnaround time needed for process design simulations. Therefore, advances in classical concepts such as plastic anisotropy and strain hardening are still very much in demand. Actual forming simulation examples conducted in the steel industry are presented for illustration purposes.

Speaker: Prof. K.J. Bathe (MIT, Cambridge, USA)

Klaus-Jürgen Bathe is Professor of Mechanical Engineering at the Massachusetts Institute of Technology. He teaches and performs research in the areas of applied and computational mechanics of structures, fluids, and electromagnetics. Professor Bathe is also the Founder of the company ADINA R & D, Inc. where he leads the development of the ADINA system, used world-wide, for the analysis of structures, fluids, and multi-physics problems. He has published numerous articles, six textbooks and the book To Enrich Life. He is a co-editor of the international journal Computers and Structures, and the Editor of the proceedings of twelve M.I.T. Conferences on Nonlinear Finite Element Analysis and seven M.I.T. Conferences on Computational Fluid and Solid Mechanics. He has been honored by the ASME, ASCE, U.S. National Academy of Engineering, M.I.T., and many honorary doctorates for his teaching, his pioneering, fundamental and widely used contributions in computational mechanics, and for bridging the world between Academia and Industry.

Title: Advances in finite element methods for the simulation of forming processes

Author: K.J. Bathe, MIT Cambridge, USA

Abstract: We present some recent advances in finite element methods for the analysis of forming processes. These advances pertain to solid and shell finite elements for large strain solutions, contact analyses, improved explicit and implicit time integration schemes, the analysis of fluid-structure interactions, electromagnetic effects, and the development of "overlapping finite elements". The use of overlapping finite elements promises to be an avenue for very effective analysis schemes. Illustrative solutions are given to show the characteristics of the various methods discussed.

Speaker: Dr. O. Ghouati (Ford Research & Advanced Engineering, Aachen, Germany)

Dr Omar Ghouati graduated in 1991 at ENSMM Besancon, France, in Mechanical Engineering, earned his PhD at University of Franche-Comté in 1994. He took a position of associate professor at the University of Franche-Comté in 1997. He joined Ford Research and Engineering in 2000. He is now a Technical Specialist in the field of stamping simulation. His field of research includes sheet metal process chain simulation, effect of manufacturing on product performance and modeling of metallic materials.

Title: Stamping simulation at Ford - Challenges and opportunities

Author: O. Ghouati, E. Liasi and A. Zaum (Ford)

Abstract: For high volume production, majority of components of the body in white are stamped. Driven by the pressure to reduce weight, part geometries and materials behaviors are increasing in complexity. It is now usual to use simulation to perform process layout and ensure the try-out phase is kept to the minimum. In this presentation we will give an overview of the use of stamping simulation at Ford. Based on actual cases, limitations and expectations for the simulation will be discussed.

Speaker: Prof. R. Logé (EPFL, Switzerland)

Roland Logé graduated in 1994 at UCL, Belgium, in Materials Science Engineering, earned a Master of Science in Mechanics in 1995, at UCSB Santa Barbara (USA), and his PhD at Mines Paristech-CEMEF (France) in 1999. After a postdoc at Cornell University (USA) between 1999 and 2001, he entered CNRS in France, at the Ecole des Mines de Paris. He became CNRS Research Director in 2013, and in 2014 joined the Materials Institute of the School of Engineering at EPFL, as an associate professor, and holder of the PX Group Chair, where he now heads the Laboratory of Thermomechanical Metallurgy.

Title: Multiscale approach for the control of metallic microstructures in forming conditions

Authors: R.E. Logé, M. Bernacki

Abstract: The modelling of metallic microstructure evolutions in forming conditions is traditionally treated by introducing homogenization (or mean field) schemes at each integration point of a finite element mesh. Typical limitations arise in trying to predict the formation of substructures, or new grain structures, in complex thermomechanical processes. It is shown that a strategic dialogue between mean field and full field models, including 2D or 3D geometrical descriptions of microstructures, can lead to progress in simulation capabilities, and improved understanding of the associated phenomena.

Speaker: Dr M. Megahed (ESI_Group, Germany)

Dr. Mustafa Megahed obtained his Ph.D. from the Technical University of Aachen, Germany, in 1993. Since then he has been involved with commercial CFD offerings. He filled several positions in development, support and engineering service. He joined ESI Group in 2004 where he enlarged the European CFD business several fold. Dr. Megahed now manages the CFD & Multiphysics Center of Excellence, leading a team of researchers focused on the development of new algorithms and creation of new solutions. His team and he are involved in Additive Manufacturing modelling since 2008 investigating several net shape processes including Topology Optimization, Powder Bed processes, Blown Powder and HiPping.

Title: Modelling Additive Manufacturing

Authors: N. N'Dri, H.-W. Mindt, O. Desmaison and M. Megahed

Abstract: Additive manufacturing offers engineers design freedom utilizing the process ability to create new functional products. Harnessing this potential has proven extremely challenging due to large amount of process parameters that interact in a highly complicated way with the material and the product being produced. Physics based modelling might provide the required insight to understand and manage the interdependency of the build process and to provide a reliable predictive tool for product quality. Modelling advancements and validation examples will be presented.

Speaker: Dr Y. Urushiyama (Chief engineer of Honda R&D Co.ltd., JAPAN)

Dr. Urushiyama is currently Chief Engineer at Honda R&D Co. Ltd in the field of Light weight vehicle and related topics. Since 2015 he is visiting Professor, in Innovative Composite Center of Kanazawa Institute of Technology. He obtained his PhD from Touhoku University in 2004. From 1983 to 1994, he worked in the field of noise and vibration stress at Honda Automobile R&D Center and from 2001 to 2010 in the field of light weight structures.

Title: Expectation and Issue of Using CFRP for Automobile Structure

Author: Y. Urushiyama (Honda R&D Co.ltd., JAPAN)

Abstract: Vehicle weight reduction is one of important issue in automobile industry. Expectation of CFRP technology which is one of?weight reduction technologies for automobile engineer are considered. But mechanical property of CFRP is affected according to the conditions under many fabrication processes. Using process simulation for composite is effective to grasp the various process influences in designing process of CFRP structures. In this presentation, I mention that the application of manufacturing simulations, such as for determination of tolerance is important.