报告名称：A dynamically reprogrammable surface with self-evolving shape morphing
报告人：黄永刚 美国西北大学
时间：2023年5月18日下午14:30
地点：宝山校区东区9号楼322室伯时会堂
黄永刚，1962年11月出生于中国北京，固体力学家，欧洲科学与艺术院院士、美国国家工程院院士、欧洲科学院院士、中国科学院外籍院士、美国国家科学院院士、美国艺术与科学院院士，英国皇家科学院外籍院士，美国西北大学冠名讲席教授。主要研究领域为材料和电子器件的力学。
Dynamic shape-morphing soft materials systems are ubiquitous in living organisms; they are also of rapidly increasing relevance to emerging technologies in soft machines, flexible electronics and smart medicines. Soft matter equipped with responsive components can switch between designed shapes or structures, but cannot support the types of dynamic morphing capabilities needed to reproduce natural, continuous processes of interest for many applications. Challenges lie in the development of schemes to reprogram target shapes after fabrication, especially when complexities associated with the operating physics and disturbances from the environment can stop the use of deterministic theoretical models to guide inverse design and control strategies. Here we present a mechanical metasurface constructed from a matrix of filamentary metal traces, driven by reprogrammable, distributed Lorentz forces that follow from the passage of electrical currents in the presence of a static magnetic field. The resulting system demonstrates complex, dynamic morphing capabilities with response times within 0.1 second. Implementing an in situ stereo-imaging feedback strategy with a digitally controlled actuation scheme guided by an optimization algorithm yields surfaces that can follow a self-evolving inverse design to morph into a wide range of three-dimensional target shapes with high precision, including an ability to morph against extrinsic or intrinsic perturbations. These concepts support a data-driven approach to the design of dynamic soft matter, with many unique characteristics.
