Jiao Pengcheng, Hong Luqin, Wang Jiajun, Yang Jie, Zhu Ronghua, Lajnef Nizar, Zhu Zhiyuan
Institute of Port, Coastal and Offshore Engineering, Ocean College, Zhejiang University, Zhoushan 316021, China.
Engineering Research Center of Oceanic Sensing Technology and Equipment, Zhejiang University, Ministry of Education, Hangzhou 310027, China.
Materials (Basel). 2021 Apr 23;14(9):2177. doi: 10.3390/ma14092177.
In this study, we propose self-triggered thermomechanical metamaterials (ST-MM) by applying thermomechanical materials in mechanical metamaterials designed with asymmetric structures (i.e., microstructural hexagons and chiral legs). The thermomechanical metamaterials are observed with programmable mechanical response under thermal excitations, which are used in mechanical metamaterials to obtain chiral tubes with negative Poisson's ratio and microgrippers with temperature-induced grabbing response. Theoretical and numerical models are developed to analyze the thermomechanical response of the ST-MM from the material and structural perspectives. Finally, we envision advanced applications of the ST-MM as chiral stents and thermoresponsive microgrippers with maximum grabbing force of approximately 101.7 N. The emerging ST-MM provide a promising direction for the design and perception of smart mechanical metamaterials.
在本研究中，我们通过将热机械材料应用于设计有不对称结构（即微观六边形和手性支腿）的机械超材料中，提出了自触发热机械超材料（ST-MM）。热机械超材料在热激励下具有可编程的机械响应，被用于机械超材料中以获得具有负泊松比的手性管和具有温度诱导抓取响应的微夹钳。从材料和结构角度建立了理论和数值模型，以分析ST-MM的热机械响应。最后，我们设想了ST-MM作为手性支架和热响应微夹钳的先进应用，其最大抓取力约为101.7 N。新兴的ST-MM为智能机械超材料的设计和感知提供了一个有前景的方向。
