题  目：Buckled Stiff Thin Films on Compliant Substrates: Mechanics, Materials and Applications

报告人：Associate Professor Hanqing Jiang, Arizona State University, USA

主持人： 黄世清 副教授

时  间：2012年3月21日（星期三）上午10：30-11：30

地  点：蒙民伟理工楼615学术报告厅 

Abstract:

Nonlinear buckling of thin, high modulus plates on compliant supports represents a classical problem in mechanics. Over the last several decades, numerous theoretical and experimental studies of this phenomenon have been performed. Although buckling has historically been viewed as a mechanism for catastrophic structural failure, pioneering work in the late 1990’s showed that this behavior can be controlled in micro and nanoscale systems to generate interesting structures with well defined geometries and dimensions in the 100 nm ~ 100 m range. Renewed interests have been re-created in this area and many active research groups are exploring basic scientific aspects as well as applications, such as in stretchable electronics, micro and nanoelectromechanical systems, high precision micro and nano-metrology methods, and pattern formation for micro/nano-fabrication. In this talk, the basic mechanics analysis will be discussed, such as buckling profile determination under small and finite deformation for several different materials, followed by some applications in stretchable electronics, tunable grating, strain sensors, and energy storage devices.

Biosketch:

Dr. Hanqing Jiang is an Associate Professor in the Mechanical and Aerospace Engineering in ArizonaStateUniversity. Dr. Jiang received Ph.D. from TsinghuaUniversity in 2001, majoring in Solid Mechanics. His current research interest is the multiphysics modeling and experiments for heterogeneous hard and soft materials, specifically on combined elastomeric materials with thin films for strain sensors, silicon thin films on soft substrates as anodes in lithium ion batteries, and integrated gels and electronics.  He has published 5 book chapters and 72 peer-reviewed journal papers, including multi-disciplinary journals (Science, PNAS), materials journals (Advanced Materials), nano journals (Nature Nanotechnology, Nano Letters), physics journals (PRL, PRB, APL, JAP), and mechanics journals (JMPS, IJP, IJSS, JAM).  Many of his papers are among the top cited papers in mechanics and/or mechanical engineering communities.