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Rubik's cube as in-situ programmable matter and a reconfigurable mechanical metamaterial

Science China Technological Sciences 2024年第10期67卷 3221-3234页

作者： ZHU ShaoWei CHEN Huan YANG XiaoQiang TAN Li JIN Shuai CHEN LiMing LIU Tao TAN XiaoJun WANG LianChao WANG Bing MUAMER Kadic College of Aerospace Engineering Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University School of Civil Aviation Northwestern Polytechnical University National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Institut FEMTO-ST CNRS UMR 6174University Bourgogne

As part of the 4th industrial revolution, programmable mechanical metamaterials exhibit great application potential in flexible robotics, vibration control, and impact protection. However, maintaining a programmed state without sustaining the external stimulus is often challenging and leads to additional energy consumption. Inspired by Rubik's cube, we design and study an insitu programmable and distribution-reconfigurable mechanical metamaterial(IPDR-MM). A matrix model is developed to model IPDR-MMs and describe their morphological transitions. Based on this model, the reinforcement learning method is employed to find the pathways for morphological transitions. We find that IPDR-MMs have controllable stiffness across several orders of magnitude and a wide range of adjustable anisotropies through morphology transformation. Additionally, because of the independence of the directions of morphology transformation and bearing, IPDR-MMs exhibit good stability in bearing and can readily achieve high stiffness. The Rubik's cube-inspired design concept is also instructive for other deformable structures and metamaterials, and the current version of the proposal should be sufficiently illustrative to attract and broaden interdisciplinary interests.

关键词： mechanical metamaterials in-situprogrammable distribution-reconfigurable Rubik's cube controllable stiffness and anisotropy

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