题目：磁流变碳纳米管复合材料及其粘弹性反应
报告人：孙立志教授
邀请人：陈志军教授
时间：3月28号，周二下午3点
地点：西六楼三楼会议室
孙立志教授现为美国加州大学欧文分校（UCI）土木与环境工程系教授，主要从事复合材料的微观细观力学研究及其在结构、交通、机械和航空领域的应用研究。目前是ASCE Journal of Nanomechanics and Micromechanics、ASCE Lecture Notes in Mechanics等期刊副编辑。曾任ASCE Committee on Inelasticity Modeling and Multiscale Behavior委员会主席、ASCE Nanocomposites委员会主席。目前任ASCE Committee on Nanomechanics and Micromechanics委员会主席，曾先后获得UCI年度最佳教师、Honda Research Initiation Award等多项科研和教学奖励。
Magnetorheological CNT Nanocomposites and Their Viscoelastic Responses
Lizhi Sun
Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697-2175, USA
Email: lsun@uci.edu
Abstract: Magnetorheological (MR) elastomer composites with the addition of multi-walled carbon nanotubes are developed. The viscoelastic responses of the MR nanocomposites to applied magnetic fields are investigated through dynamic mechanical analysis. It is found that a small amount of carbon nanotubes can effectively improve the mechanical performance of conventional MR elastomers. The MR nanocomposites have shown not only large jumps in zero-field dynamic stiffness and damping, but also higher magnetic-field-induced improvement in these dynamic mechanical properties. In addition, a micromechanics-based viscoelastic constitutive model of nanocomposites was developed with a particular focus on the effect of imperfect interface between matrix polymer and carbon nanotubes.
Bio: Dr. Lizhi Sun is a full professor in Departments of Civil & Environmental Engineering (CEE) and Chemical Engineering & Materials Science at University of California, Irvine (UCI). His primary area of research is the micro/nano-mechanics of heterogeneous composite materials, with applications in civil, mechanical, aerospace, electronic, and biomedical engineering. His research has been sponsored by NSF, Army, Air Force, Navy, and Honda R&D. He has published more than 170 papers including 90 peer-reviewed journal papers in the fields of mechanics and materials. He wins numerous academic and research awards such as Fellow of ASCE’s Engineering Mechanics Institute (2014), UCI Civil and Environmental Engineering Professor of the Year (2013), AFRL Faculty Fellow (2011), UCI School of Engineering Fariborz Maseeh Best Faculty Research Award (2008), Honda Research Initiation Award (2006), and UCLA Engineering School Outstanding Ph.D. Award (1998).
Dr. Sun is an editor for International Journal of Damage Mechanics, associate editor for ASCE’s Journal of Engineering Mechanics, Journal of Nanomechanics and Micromechanics, and Lecture Notes in Mechanics, and editorial board member for Journal of Surfaces and Interfaces of Materials and International Journal of Biomedical Imaging. He has organized more than 50 symposia for various societies and served as a reviewer for more than 60 journals and 10 funding agencies (e.g. NSF, NIH, and DoD). Dr. Sun has been the technical committee chair for ASCE-EMI Committee on Inelasticity Modeling and Multiscale Behavior (2009-2011), ASCE-EMI Committee on Nanocomposites (2012-2013), and ASCE-EMI Committee on Nanomechanics and Micromechanics (2014-Present).
