Tensegrity-inspired sandwich metamaterial for reprogrammable stiffness and impact mitigation

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-05-07 DOI:10.1016/j.ijmecsci.2025.110344

Bowen Tan, Bushra Jawed, Ke Liu

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Abstract

Metamaterials are renowned for their unique properties, but most have fixed properties once fabricated. Tensegrity metamaterials offer tunable mechanical properties by adjusting prestress, making them excellent for load-bearing and energy absorption. However, tensegrity structures’ inherent self-equilibrium and stability demand complex geometries with irregular angles and pre-tensions, restricting convenient fabrication. To address those limitations, we propose a tensegrity-inspired sandwich metamaterial (TSM), which preserves the stress redistribution capability of standard tensegrity structures, yet can be easily fabricated. The design comprises an elastic membrane sandwiched by two spiked plates, with the membrane in tension and the spikes in compression. The TSM can be reprogrammed to achieve a wide range of static and dynamic responses by adjusting the preloading distance between the two plates. In particular, the TSM achieves a tuning of energy dissipation efficiency within the range of 20%-56% and the tuning of mitigation rate in the range of 0.136-0.204 by a single layer. This study provides a pathway for creating effective and reprogrammable energy-absorbing metamaterials for impact mitigation systems, allowing for active control of static and dynamic responses.

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受张拉整体启发的夹层超材料，用于可重新编程的刚度和冲击缓解

超材料以其独特的性能而闻名，但大多数材料一旦制成就具有固定的性能。张拉整体超材料通过调整预应力提供可调的机械性能，使其具有良好的承载和能量吸收能力。然而，张拉整体结构固有的自平衡和稳定性要求具有不规则角度和预张力的复杂几何形状，限制了制造的方便性。为了解决这些限制，我们提出了一种受张拉整体启发的三明治超材料（TSM），它保留了标准张拉整体结构的应力重分布能力，但可以很容易地制造。该设计包括一个弹性膜夹在两个尖刺板中，膜处于拉伸状态，尖刺处于压缩状态。TSM可以重新编程，通过调整两个板之间的预加载距离来实现大范围的静态和动态响应。特别是，TSM实现了单层能量耗散效率在20% ~ 56%范围内的调谐，减缓率在0.136 ~ 0.204范围内的调谐。这项研究为创建有效的、可重新编程的吸能超材料提供了一条途径，可以有效地控制静态和动态响应。

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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.