In-plane dynamics of symmetric reentrant tetrachiral auxetic metamaterials

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-05-02 DOI:10.1016/j.coco.2025.102428

Xinlong Guang , Huilan Huang , Xiaolin Deng

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Abstract

Three innovative auxetic metamaterials with mirror symmetric cells are proposed by modifying conventional tetrachiral honeycomb (CTH) cells through mirror symmetry. Two mirror symmetric tetrachiral substructures (MSTS) with special ligaments are named MSTS-Ⅰ and MSTS-Ⅱ. Subsequently, MSTS-Ⅰ and MSTS-Ⅱ were hybridized in an ingenious and coordinated way to obtain symmetric reentrant tetrachiral honeycomb (SRTH) metamaterials. SRTH was prepared using an additive manufacturing technique, and the anisotropy of SRTH was examined and explored through experimental compression testing, theoretical prediction and finite element analysis (FEA). CTH, MSTS, and SRTH were extensively characterized for mechanical properties and energy harvesting. The specific energy absorption of MSTS and SRTH under equal mass increased by 138.43 % and 94.02 % over CTH, respectively. Moreover, the novel structures showed excellent stability and auxeticity under large compressive deformation. Parametric research indicates that the concave angle and nodal circle of SRTH play a crucial role in the auxeticity and mechanical properties of the proposed metamaterials under compression. This work serves as a reference for advancing the development of chiral structures and broadening their applications in protective engineering.

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对称可重入四手性缺失超材料的面内动力学

通过对传统的四手性蜂窝（CTH）细胞进行镜像对称修饰，提出了三种具有镜像对称细胞的新型补体超材料。两个具有特殊韧带的镜像对称四手性亚结构（MSTS）分别命名为MSTS-Ⅰ和MSTS-Ⅱ。随后，将MSTS-Ⅰ和MSTS-Ⅱ以巧妙协调的方式杂交得到对称可重入四手性蜂窝（SRTH）超材料。采用增材制造技术制备了SRTH，并通过实验压缩测试、理论预测和有限元分析（FEA）对SRTH的各向异性进行了研究。CTH、MSTS和SRTH的力学性能和能量收集得到了广泛的表征。MSTS和SRTH在相同质量下的比能吸收比CTH分别提高了138.43%和94.02%。此外，新型结构在大压缩变形下表现出良好的稳定性和抗压缩性。参数化研究表明，SRTH的凹角和节圆对所提出的超材料在压缩条件下的塑性和力学性能起着至关重要的作用。本工作对推进手性结构的发展和扩大手性结构在防护工程中的应用具有一定的参考价值。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.