Design and Characterization of New 3D Reentrant Rhombic Auxetic Structures with Enhanced Mechanical Properties,Physica Status Solidi-Rapid Research Letters

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Design and Characterization of New 3D Reentrant Rhombic Auxetic Structures with Enhanced Mechanical Properties
Physica Status Solidi-Rapid Research Letters ( IF 2.5 ) Pub Date : 2023-11-27 , DOI: 10.1002/pssr.202300347
Yingying Xue ₁ , Jianhui Mu ₁ , Xingfu Wang ₂

Affiliation

In this study, a new reentrant rhombic auxetic structure is first designed by replacing the reentrant strut of the regular reentrant structure with a rhombic structure. A simulation calculation method verified by experimental results is comprehensively developed to reveal the compressive behavior of the proposed structures in terms of deformation pattern, compression strength, Poisson's ratio, and energy absorption (EA). Based on the validated simulation method, the results indicate that compression load can give rise to an “X” deformation pattern of the rhombic auxetic structures. In the structure parametric study, it is further proved that the unit configuration exhibits a significant influence on the compression stress and EA of the structures. Furthermore, the rhombic auxetic structures present diverse Poisson's ratios with the structure parameters and compression global strain, that is, the structures with larger H, smaller D, and θ are found to present more pronounced auxetic effect. The compression direction also exhibits a remarkable effect on the performance of the structure, which accordingly indicates the anisotropic characteristic of the proposed structures. Moreover, compared with the other regular auxetic structures, the rhombic auxetic structures exhibit superior mechanical behavior and EA feature due to the introduction of the rhombic structure.

中文翻译：

具有增强机械性能的新型 3D 凹入菱形拉胀结构的设计和表征

在本研究中，首先通过用菱形结构代替常规凹入结构的凹入支柱，设计了一种新的凹入菱形拉胀结构。综合开发了一种经实验结果验证的模拟计算方法，以揭示所提出结构在变形模式、压缩强度、泊松比和能量吸收（EA）方面的压缩行为。基于经过验证的模拟方法，结果表明压缩载荷可以引起菱形拉胀结构的“X”变形模式。在结构参数研究中，进一步证明单元配置对结构的压应力和EA具有显着影响。此外，菱形拉胀结构随结构参数和压缩全局应变呈现出不同的泊松比，即H较大、D和θ较小的结构表现出更明显的拉胀效应。压缩方向对结构的性能也表现出显着的影响，这相应地表明了所提出的结构的各向异性特征。此外，与其他规则拉胀结构相比，由于菱形结构的引入，菱形拉胀结构表现出优异的机械性能和EA特征。

更新日期：2023-11-27

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