报告人： 黄国良 教授（密苏里大学哥伦比亚分校）
报告题目：Active Mechanical Metamaterials: Design, Theory and Applications
报告时间：2021年4月17日（周六）22:00
腾讯会议：ID(515422334)
邀 请 人： 孙博华教授 南非科学院院士、力学技术研究院院长和首席科学家
报告人简介：
Dr. Guoliang Huang is currently a James C. Dowell Distinguished professor of mechanical and aerospace engineering at University of Missouri-Columbia. He received his Ph.D. degree from University of Alberta, Canada, in 2004. Dr. Huang’s research interests include wave propagation and mechanics in elastic/acoustic metamaterials and structural materials, topological and active mechanics, structural dynamics, vibration and sound wave mitigation. Dr. Huang’s research has been funded by NSF, Air Force of Scientific Research, Army Research Office, Office of Naval Research, DURIP, Department of Energy, NASA, and major industries. He has authored one book, 4 book chapters and more than 130 journal papers (includeNature Reviews Materials, Nature Communications, Proceedings of the National Academy of Sciences (PNAS), Advanced Materials, Physical Review Letters, Journal of Mechanics and Physics of Solids, et al.).
报告摘要：
Biological and artificial machinery systems have utilized the approach made by sensing, actuating, and information processing to adapt themselves to environmental changes, maintain dynamic equilibrium, and execute particular functions. Examples include octopuses that change their colors and shapes according to environments, a warm of ants that transport foods, smart thermostats, to self-driving cars. In this talk, we present how to take advantage of this approach to construct active mechanical metamaterials for enabling a range of unprecedent wave phenomena. The active mechanical metamaterials are composed of piezoelectric sensors and actuators connected with digital electronic circuits. The electrical degrees of freedom implemented allow for precisely and independently modulating mechanical properties through electromechanical coupling in the metamaterial. By means of theory, numerical simulations and experiments, we systematically demonstrate broadband wave mitigation, independently wave transmission and reflection control and odd micropolar elasticity for achieving non-Hermitian skin effects.
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