Crashworthiness design of bio-inspired ring arrays for impact protection

被引：0
|
作者：
Xing Y. [1 ,2 ]
Zhang Q. [1 ,2 ]
Yang X. [1 ,2 ]
Liu H. [1 ,2 ]
Yang J. [1 ,2 ]
机构：
[1] School of Aeronautic Science and Engineering, Beihang University, Beijing
[2] Laboratory of Advanced Structural Impact and Biomimetic Mechanics, Beihang University, Beijing
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2022年 / 43卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
bionic design; crashworthiness; graded ring system; impact resistance; programmability;
D O I：
10.7527/S1000-6893.2021.26194
中图分类号：
学科分类号：
摘要：
Inspired by the stiffness distribution of the beetle exoskeleton cuticle, a novel type bionic stiffness gradient ring array protective structure is proposed. This structure has excellent impact resistance, high stiffness programmability, and shape reconfigurability, and can be extended to a variety of size ratios and assembly frame types to meet more practical engineering impact protection requirements. Based on the numerical simulation technology, a finite element model of the biomimetic stiffness gradient ring protective system under impact loads is established. Combining experimental analysis and the theoretical model, we explore the propagation law of stress waves in the bionic stiffness gradient ring system and the impact mechanical behavior and protective capability of the bionic gradient ring system. The results reveal the ability of the concave stiffness gradient to significantly improve the protection performance of the bionic ring system. A complete parametric analysis is conducted to study the influence of the elastic modulus, radius and thickness distribution of the ring on the protective properties of the bionic stiffness gradient ring system, finally obtaining the optimal solution to the stiffness gradient programming. © 2022 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.
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