讲座题目：Mechanical Design of Protective Materials and Systems
报告人：Dr. Lifeng Wang
时 间：6月22日（周三）下午3:00-4:30
地 点：力学楼434会议室
主持人：李法新（特聘研究员）
报告内容摘要：
New design concepts for energy absorption materials, especially for personal protection applications, have attracted great interest in material science. The extraordinary mechanical performances of polymer structures and composites enable them as constituents in hierarchically structured protective systems for achieving superior mechanical performance. Firstly this talk will present the plastic dissipation mechanism and mechanical response of polymeric microtruss/microframe structures using micromechanical modeling of large deformations. Then the bio-inspired composites exhibiting a tunable negative plastic Poisson’s ratio will be discussed, which greatly enhances the volume energy dissipation during plastic deformation providing a significant toughening mechanism. Lastly the talk will show the design and fabrication of 3D periodic co-continuous composite materials for achieving enhancements in stiffness, strength, energy dissipation, and damage tolerance. These studies provide fundamental understanding of optimizing penetration resistance and protection and guidelines for engineering and tailoring the nonlinear mechanical behavior and energy absorption for advanced protective systems.
报告人简介：
Dr. Lifeng Wang received his B.E. (2001) and Ph.D. (2006) both from Tsinghua University, majoring in Solid Mechanics. He is currently working as a Postdoctoral Associate on the mechanics of polymers, polymeric-based micro- and nano-composite materials, and biological materials in the Department of Mechanical Engineering at Massachusetts Institute of Technology. Dr. Wang received National Excellent Doctoral Dissertation Award of P.R. China (2008) and Natural Science Award from Ministry of Education of China (2009). He will join the Department of Civil & Environmental Engineering at Clarkson University as an Assistant Professor in July 2011. His research interest includes mechanical behaviors of polymer fibers, thin films, microframes/microtrusses, and composites, nanomechanics of biological materials and bio-inspired materials, and mechanics of carbon nanotubes, graphite, and carbon nanotube composites. Dr. Wang is now recruiting a PhD student to study solid mechanics at Clarkson University. Interested candidates are encouraged to contact him directly (wanglf@mit.edu).