仿羽状肌蜂窝结构的力学性能与吸能特性研究

Study on the mechanical properties and energy absorption characteristics of pennate muscle-inspired honeycomb structure

摘要

为满足防护装备对能量吸收与力学性能的需求，受人体羽状肌结构形态的启发，基于结构仿生原理设计了一种仿生羽状肌蜂窝结构（pennate muscle-inspired honeycomb structure，PM-HS）。采用3D打印技术制备结构样件，并结合准静态压缩试验与有限元仿真，对所提出的PM-HS模型进行验证与性能分析。通过设计7种结构参数的PM-HS模型，系统探讨了几何参数变化对其等效力学性能与吸能特性的影响。研究结果表明，在所设计的7种结构中，PM-HS-D具有最优的综合性能，其等效应力（241.01 MPa）与应变值（0.19）较低，应力分布更加均匀；在吸能性能方面，PM-HS-D吸收的能量（E）达到3 611.64 mJ，单位质量比吸能（S_m）和单位体积比吸能（S_v）分别为206.34 mJ/g和231.10 mJ/cm³，均显著优于其他结构。上述结果表明，PM-HS-D在承载能力与能量吸收性能方面表现出明显优势，经过进一步优化后，可作为特定防护场景下的潜在优选材料。

Abstract

In response to the need for energy absorption and mechanical performance in protective equipment，this study presents a bio-inspired pennate muscle-inspired honeycomb structure （PM-HS），designed based on the principles of structural biomimicry. The structure was fabricated using 3D printing technology，and both quasi-static compression experiments and finite element simulations were conducted to validate and analyze the performance of the proposed PM-HS model. Seven PM-HS models with varying structural parameters were designed to systematically investigate the effects of geometric variations on their equivalent mechanical properties and energy absorption characteristics. The results indicated that among the seven structures，PM-HS-D exhibited the best overall performance，with lower equivalent stress （241.01 MPa） and strain （0.19） values and more uniform stress distribution. In terms of energy absorption，PM-HS-D absorbed 3 611.64 mJ，with specific energy absorption per unit mass （S_m） and specific energy absorption per unit volume （S_v） of 206.34 mJ/g and 231.10 mJ/cm ³，respectively，both significantly outperforming the other models. These findings suggest that PM-HS-D shows clear advantages in both load-bearing capacity and energy absorption performance. With further optimization，it could serve as a potential material for specific protective applications.

关键词

仿生羽状肌结构 / 蜂窝结构 / 有限元仿真 / 力学性能 / 吸能性能

Key words

pennate muscle structure / honeycomb structure / finite element simulation / mechanical properties / energy absorption properties

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基金资助

国家自然科学基金资助项目(52071150)