Crashworthiness analysis of a novel bioinspired hexagonal honeycomb under out-of-plane crushing

Abstract

In this paper, a novel bioinspired hexagonal honeycomb (NBHH) is proposed. Different from the conventional honeycomb (CH), the core wall of the NBHH has a saw-tooth corrugated shape. Firstly, LS-DYNA R11.0 is used to construct a finite element model and conduct experimental verification; then, a comparative analysis is carried out with the CH and the bionic honeycomb sandwich panel (BHSP) with sinusoidal curves, and the proposed NBHH exhibits excellent energy absorption capability under dynamic impact. In particular, compared with the CH and the BHSP with the same wall thickness, the specific energy absorption of the NBHH is 58.60% higher than that of the CH. Compared with the BHSP, the specific energy absorption of the NBHH has increased by 7.23%. Finally, parametric research is carried out on the NBHH.

Keywords:

• Crashworthiness
• hexagonal honeycomb
• energy absorption
• out-of-plane impact
• numerical simulation

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.

Additional information

Funding

This work is supported by National Natural Science Foundation of China (No. 52065059), the Basic Ability Enhancement Program for Young and Middle-aged Teachers of Guangxi (No. 2023KY0703) and Wuzhou Science and technology plan project (No. 202202042).