可编程材料 – 从非线性力学到全向热学的性能设计
日期：2024/11/19 - 2024/11/19
学术讲座：可编程材料 – 从非线性力学到全向热学的性能设计
主讲人：Dr. Weichen Li, Postdoctoral Research Associate at University of Illinois Urbana-Champaign (UIUC)
时间：2024年11月19日（周二）上午9:00
在线链接: https://vc.feishu.cn/j/605579140
讲座摘要
Developing tools to tackle increasingly challenging tasks has been a constant pursuit of mankind. In modern times, this quest has evolved into the invention of new materials with designable and extreme properties for solving existing challenges and enabling new applications. With the advancement of technologies like additive manufacturing, this vision is no longer a distant dream. However, it faces a major hurdle: the underdevelopment of intelligent, automated, and physics-based design methodologies in the context of complex and multi-physics behaviors.
In this talk, I will present some state-of-the-art technologies to systematically program and realize complex multi-physics material behaviors. This is made possible through the development of advanced rational design methods based on topology optimization and de-homogenization, along with advanced fabrication techniques. I will demonstrate how we can program a variety of material behaviors involving different physics, including 1) nonlinear force-displacement response and deformation modes of soft elastic structures, 2) temperature-switchable mechanical behaviors of architected materials, 3) thermal actuation of liquid crystal elastomers, and 4) omnidirectional heat flow for thermal meta-device (e.g., thermal cloaks). The algorithmically designed materials/structures feature irregular geometries and material distribution, which are precisely manufactured using customized hybrid fabrication techniques. The extreme and counterintuitive programmed behaviors are experimentally validated and physically reproduced. The developed technologies enable the creation of new classes of materials with customizable properties, opening up a broad range of potential applications.
主讲人简介
Dr. Weichen Li is a Postdoctoral Research Associate at University of Illinois Urbana-Champaign (UIUC). He obtained his Ph.D. degree in Civil Engineering at UIUC, M.S. degree in Civil Engineering from Georgia Tech, and M.E. and B.E. degrees in Civil Engineering from South China University of Technology (SCUT). His field of research is computational mechanics and design optimization, with a focus on creating mechanical and multi-physics metamaterials with programmable and extreme behaviors via rational design and advanced fabrication. His research is published in high-impact journals, including PNAS, Science Advances, and Nature Communications. He is the recipient of the Structural Engineering Fellowship of UIUC and multiple Annual Fellowship for Outstanding Students of SCUT.