An elastic-boundary-controlled framework for on-demand stability switching in bistable curved beam metamaterials

IF 3.8 3区工程技术 Q1 MECHANICS

International Journal of Solids and Structures Pub Date : 2025-06-27 DOI:10.1016/j.ijsolstr.2025.113542

P.Q. Li, Y.S. Wang, K.F. Wang, B.L. Wang

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引用次数: 0

Abstract

This study presents a framework for on-demand stability switching in bistable curved beam metamaterials through the control of elastic boundaries. Theoretical model is derived to quantify the relationship between boundary stiffness (axial and transverse) and key performance metrics, including negative stiffness, bistability, and hysteresis characteristics. A bistable structure with designable axial and transverse elastic boundaries is developed. Theoretical model and experimental results demonstrate that adjusting axial elastic boundaries enables precise transitions between bistable, negative-stiffness, and monostable states, while transverse elastic boundaries govern hysteresis behavior and energy dissipation efficiency. Meanwhile, the synergistic interaction between axial and transverse elastic boundaries, combined with nonlinear elastic constraints, further enhances tunability, achieving controllable localized dissipation phenomena and a 10.7% increase in maximum energy dissipation efficiency compared to linear elastic boundaries. This work lays the foundation for programmable multistable metamaterials from the perspective of elastic constraints, with potential applications in energy-adaptive structures, soft robotics, and mechanical logic systems.

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双稳弯曲束超材料按需稳定切换的弹性边界控制框架

本文提出了一种通过弹性边界控制实现双稳态弯曲梁超材料按需稳定性切换的框架。导出理论模型来量化边界刚度（轴向和横向）与关键性能指标之间的关系，包括负刚度、双稳定性和迟滞特性。建立了具有可设计的轴向和横向弹性边界的双稳结构。理论模型和实验结果表明，调整轴向弹性边界可以实现双稳态、负刚度和单稳态之间的精确转换，而横向弹性边界控制滞回行为和能量耗散效率。同时，轴向和横向弹性边界之间的协同作用，结合非线性弹性约束，进一步增强了可调性，实现了可控的局部耗散现象，最大能量耗散效率比线性弹性边界提高了10.7%。这项工作从弹性约束的角度为可编程多稳态超材料奠定了基础，在能量自适应结构、软机器人和机械逻辑系统中具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Solids and Structures 物理-力学

CiteScore

6.70

自引率

8.30%

发文量

405

审稿时长

70 days

期刊介绍： The International Journal of Solids and Structures has as its objective the publication and dissemination of original research in Mechanics of Solids and Structures as a field of Applied Science and Engineering. It fosters thus the exchange of ideas among workers in different parts of the world and also among workers who emphasize different aspects of the foundations and applications of the field. Standing as it does at the cross-roads of Materials Science, Life Sciences, Mathematics, Physics and Engineering Design, the Mechanics of Solids and Structures is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from the more classical problems of structural analysis to mechanics of solids continually interacting with other media and including fracture, flow, wave propagation, heat transfer, thermal effects in solids, optimum design methods, model analysis, structural topology and numerical techniques. Interest extends to both inorganic and organic solids and structures.