报告题目：Virtual Testing and Designing of Heterogeneous Materials
报告人：杨庆大博士
时间：2012年6月29日（周五）上午10：30
地点：安中大楼A322会议室
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报告简介
This lecture will present the recent success in developing a top-down multiscale approach for virtual testing of composites. Focus will be on the numerical platform based on our augmented finite element method (A-FEM). It will be shown that the A-FEM is capable of modeling both the multiscale material heterogeneity and the multiple arbitrary cracking systems in composites, which is achieved by incorporating explicit descriptions of multiple damage processes and allowing for cohesive cracks to be initiated at any locations where an initiation criterion is met. Successful examples using this method to deduce the progressive failure process of several composite materials based solely on their constituent matrix, fiber, and interface properties (i.e., no need for any other failure parameters) will be given to demonstrate the virtual testing capability. The perspective of using A-FEM for fatigue and high-velocity impact loading environment will also be discussed. Finally, I shall introduce a much enhanced new A-FEM formulation currently under development within my group, which we believe will be the next generation finite element solution for arbitrary cracking problems.
报告人简介
Dr. Qingda Yang is an associate professor of Mechanical and Aerospace Engineering at the University of Miami (Coral Gables, FL). He obtained his B.S. (Engineering Mechanics, 1991) and M. S. (solid mechanics, 1994) from Zhejiang University, China, and a PhD (Mechanical Engineering, 2000) from University of Michigan at Ann Arbor. Prior to joining University of Miami, Dr. Yang worked for Rockwell Scientific Company (formerly known as Rockwell Science Center) as a solid mechanics scientist from 2000 to 2006.
Dr. Yang’s primary research areas include the mechanical and thermal related issues in engineering materials and structures with emphasis on failure and damage assessment of engineering composites and biomaterials. His recent research focus has been on developing multi-scale methodologies that can lead to realistic virtual testing and designing of complex heterogeneous materials. Dr. Yang is an author/coauthor of more than 50 journal publications, 2 book chapters, and more than 30 referred conference proceedings. He is a member of the editorial board for the Journal of Applied Composite Materials, and is currently serving as the Chair of the Composite and Heterogeneous Materials Committee in ASME, and as an executive committee member of Aerospace Division (ASD) in ASCE.