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GRASP Lab Seminar 2004-2005
September 3, 11:00 AM, Levine Hall 307, hosted by Vijay Kumar.
Michael Yu Wang
Department of Automation and Computer Aided Engineering, The Chinese University
of Hong Kong
Physical Modeling and Optimization of Heterogeneous Solids: Level Set Methods
Abstract: A heterogeneous object is referred to as a solid object made of different constituent materials. The object is of a finite collection of regions of a set of prescribed material classes of continuously varying material properties. These properties have a discontinuous change across the interface of the material regions. We present a variational framework of Mumford-Shah model for a well-posed formulation for the design of the heterogeneous solids. We discuss two approaches to the modeling and optimization problem of free-discontinuities: a multi-phase level-set model and a multi-material phase-field model, both to represent the discontinuities implicitly. These models yield a computational system of coupled geometric evolution and/or diffusion partial differential equations. Promising features of the proposed method include strong regularity in problem formulation, topological flexibility, and inherent capabilities of geometric, physical and material modeling, incorporating dimension, shape, topology, material properties, and even micro-structures within a common framework for design and optimization of the heterogeneous solids. The proposed methods are illustrated with several examples of optimization of multi-material structures, materials design, and compliant mechanism synthesis. Further applications in tissue modeling, flexonic MEMS, and drug diffusion and delivery MEMS will be discussed.
Biography: Professor Michael Yu Wang has been with the Chinese University of Hong Kong since 2000 and is the director of the Computational Modeling and Design Laboratory. Prior to joining CUHK, he had been with the Department of Mechanical Engineering of the University of Maryland at College Park for ten years, where he was an Associate Professor, the Director of the Manufacturing Automation Laboratory and an affiliated faculty member of the Institute for Systems Research.
Professor Wang received his B.S degree in Mechanical and Manufacturing Engineering from Xi'an Jiaotong University (China) (1982), M.S. degree in Engineering Mechanics from Pennsylvania State University (1985), and Ph.D. in Mechanical Engineering from Carnegie Mellon University (1989). He has developed 37 research projects supported by the National Science Foundation (NSF), Boeing, Chrysler, ALCOA, Maryland Industrial Partnerships (MIPS) in USA, by RGC and ITC and local industries in Hong Kong, and by NSFC and MOST in China. He has supervised 4 Ph.D, 11 M.S. and 1 MPhil degree students. He is the author of 122 technical articles. Professor Wang is currently a Senior Editor of IEEE Trans. on Automation Science and Engineering (2003-) and an Editorial Board member of Assembly Automation Journal. He served as an Guest Editor for IEEE Trans. on Robotics and Automation (2003-2004), and an Associate Editor of IEEE Trans. on Robotics and Automation (1998-2002) and of ASME Journal of Manufacturing Science and Engineering (1999-2002). His is the Chair of the IEEE RAS Manufacturing Automation Technical Committee. He was the conference chair of 5th ASME Design for Manufacturing Conference in 2000. He received a Research Initiation Award from NSF (1993), a Ralph R. Teetor Educational Award from SAE in 1994 and a LaRoux K. Gillespie Outstanding Young Manufacturing Engineer Award from Society of Manufacturing Engineers in 1995, and was a Boeing - A.D. Welliver Faculty Summer Fellow in 1998. In 2001, together with D. Pelinescu, he received the Kayamori Best Paper Award of 2001 IEEE International Conference on Robotics and Automation (ICRA 2001) at Seoul, Korea. He was awarded the Overseas Young Investigator Collaboration Award from the Natural Science Foundation of China (NSFC) (2002) and The Science and Technology Development Award (Second Class) from The Ministry of Education of China (2004). He was a visiting scholar in the Department of Mechanical Engineering of Stanford University in Summer 2003, an ASTAR OAP Fellow in Nanyang Technological University, Singapore in 2003, and a Guest Professor at Huazhong University of Science and Technology, Shanghai Jiaotong University, and Haerbin Institute of Technology all in China.
