三维模块化多稳态超材料中的重力引导断裂序列

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2024-10-19 DOI:10.1016/j.ijmecsci.2024.109793

Jia-Jia Mao , Zeguang Wei , Liao-Liang Ke

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引用次数: 0

摘要

多稳态超材料的断裂序列对其在弹性波控制和能量释放方面的应用至关重要。尽管重力是多稳态超材料的一个基本特性，但人们从未研究过重力对其断裂序列的影响。本文研究了结构重力如何影响多稳态超材料抢断序列的力学机制，以构建确定性的静态和动态抢断序列。本文开发了一种双轴卡穿可用性三维（3D）模块化多稳态超材料（MMM）。三维多稳态超材料是由可拆卸的中间杆（M-bar）和包含两根双稳态曲线梁的固定框架组成的单元单元组装而成的。除实验测试和数值模拟外，还进行了分析，以验证三维 MMM 在重力作用下的折断顺序。此外，考虑到 M 型杆是可拆卸的，还详细讨论了其长度对三维 MMM 的机械性能和抗冲击性的影响。研究发现，重力可引导三维 MMM 的静态和动态确定性折断序列，优化弹性波传播和能量释放过程，而所提出的三维 MMM 可通过弹性变形增强结构的抗冲击能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Gravity-guided snapping sequence in 3D modular multistable metamaterials

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Gravity-guided snapping sequence in 3D modular multistable metamaterials

The snapping sequence of multistable metamaterials is critical for their applications in elastic wave control and energy release. Despite being a fundamental property, the effect of gravity on the snapping sequence has never been studied. This paper investigates the mechanical mechanism how structural gravity affects the snapping sequence of multistable metamaterials to construct deterministic static and dynamic snapping sequences. A biaxial snap-through availability three-dimensional (3D) modular multistable metamaterial (MMM) is developed. The 3D MMM is assembled from unit cells consisting of a dismountable middle bar (M-bar) and a fixed frame containing two bistable curved beams. Except experimental tests and numerical simulations, analytical analyses are also conducted to verify the snapping sequence induced by gravity in the 3D MMM. In addition, given that the M-bar is dismountable, the effects of its length on the mechanical properties and the impact resistance of the 3D MMM are discussed in detail. It is found that gravity can guide both static and dynamic deterministic snapping sequences of the 3D MMM to optimize the process of elastic wave propagation and energy release, and the proposed 3D MMM can enhance structural impact resistance through elastic deformations.

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.