期刊
COMPOSITE STRUCTURES
卷 194, 期 -, 页码 36-48出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.03.099
关键词
Hierarchical structure; Hexagonal columns; Crashworthiness; Energy absorption
资金
- National Natural Science Foundation of China [51675190]
- Fujian Province Natural Science Foundation of China [2015J01204]
- Program for New Century Excellent Talents in Fujian Province University
- Promotion Program for Young and Middleaged Teacher in Science and Technology Research of Huaqiao University [ZQN-PY202]
Self-similar hierarchical structures are widely observed in nature, and have been credited with superior mechanical properties. In this paper, a novel self-similar hierarchical hexagonal columns (HHC) is proposed to improve structural crashworthiness performance. The self-similar hierarchical hexagonal columns are constructed by iteratively adding sub-hexagons at the corners of primary hexagon. To investigate the crashworthiness of HHC, the nonlinear finite element model is first developed and validated against experimental data obtained from 1(st) order HHC. Numerical investigations of 1(st) and 2(nd) order hierarchical hexagonal columns with different hierarchical levels are performed to compare with 0(th) order HHC, the results show that 1(st) and 2(nd) order hierarchical hexagonal columns improve the energy absorption and crush force efficiency by governing the material distribution, especially, 2(nd) order HHC exhibits significant advantage for energy absorption. In addition, parametric designs of 2(nd) order HHC are carried out to explore crashworthiness effect on hierarchical size ratio, cell wall thickness and impact velocity. The significant effects on both specific energy absorption (SEA) and the peak crushing force (PCF) are observed. The findings of this study offer a new route of designing novel crashworthiness structure with highly energy absorption capacity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据