Re-entrant chiral origami metamaterials with enhanced load-carrying stability

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-08-14 DOI:10.1016/j.ijmecsci.2025.110728

Haiying Yang , Haibao Lu , Yong-Qing Fu

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引用次数: 0

Abstract

Conventional honeycomb structures are typically constrained by their single-mode deformation characteristics and low load-carrying stability, making it challenging to simultaneously achieve multimodal deformation and stable energy dissipation. In this study, a metamaterial with re-entrant configurations based on chiral origami structures was proposed and tested under quasi-static compression conditions. The results showed that compared with the conventional honeycomb structure, the proposed metamaterial presented a significant auxetic effect, and its crushing force efficiency (an index for evaluating load-carrying stability) improved by 13.0 %. The combined deformation from in-plane contraction and out-of-plane twisting was induced through the designed multistage folding mechanism under an axial load. The compression performances of such metamaterials with different geometrical configurations were investigated both numerically and experimentally. We established a mechanical model for the gradient crease design strategy. Furthermore, we performed 100 cyclic compression experiments and verified that the as-developed metamaterial exhibited good load-bearing stability, cycle durability, and high geometric rebound rate, ensuring the integrity of critically protected objects after multiple collisions. This study provides a novel method for improving the mechanical performance of conventional honeycomb and stimulating new innovations in metamaterials.

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具有增强负载稳定性的可重入手性折纸超材料

传统蜂窝结构受单模态变形特性和低承载稳定性的限制，难以同时实现多模态变形和稳定耗能。本文提出了一种基于手性折纸结构的可重入结构超材料，并在准静态压缩条件下进行了测试。结果表明，与传统蜂窝结构相比，该材料具有明显的减振效果，其破碎力效率（衡量承载稳定性的指标）提高了13.0%。通过设计的多级折叠机构，在轴向载荷作用下产生面内收缩和面外扭转复合变形。对不同几何结构的超材料的压缩性能进行了数值和实验研究。建立了梯度折痕设计策略的力学模型。此外，我们进行了100次循环压缩实验，验证了所开发的超材料具有良好的承载稳定性，循环耐久性和高几何回弹率，确保了多次碰撞后关键保护物体的完整性。该研究为提高传统蜂窝材料的力学性能和促进超材料的创新提供了一种新的方法。

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 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.