Journal
MATERIALS
Volume 14, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/ma14092177
Keywords
mechanical metamaterials; thermomechanical materials; self-triggered response; thermal excitations
Categories
Funding
- Key Research and Development Program of Zhejiang, China [2021C03180, 2021C03181]
- Fundamental Research Funds for the Central Universities, China [2020-KYY-529112-0002]
- Startup Fund of the Hundred Talents Program at the Zhejiang University, China
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In this study, a novel self-triggered thermomechanical metamaterial (ST-MM) is proposed by applying thermomechanical materials in mechanical metamaterials designed with asymmetric structures. The ST-MM shows programmable mechanical response under thermal excitations, with potential applications as chiral stents and thermoresponsive microgrippers. Theoretical and numerical models are developed to analyze the thermomechanical response of the ST-MM, indicating a promising direction for the design and perception of smart mechanical metamaterials.
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.
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