In-plane dynamic crushing of dual-material structure with negative Poisson's ratio

被引：0
|
作者：
Ma F.-W. [1 ,2 ]
Liang H.-Y. [1 ,2 ]
Wang Q. [1 ]
Pu Y.-F. [1 ]
机构：
[1] State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun
[2] Qingdao Automobile Research Institute, Jilin University, Qingdao
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2021年 / 51卷 / 01期
关键词：
Axial impact; Collision energy absorption; Dual-material; Gradient distribution; Negative Poisson's ratio; Vehicle engineering;
D O I：
10.13229/j.cnki.jdxbgxb20190851
中图分类号：
学科分类号：
摘要：
Dual-material auxetic double arrowhead structure with negative Poisson's ratio was proposed. Under the assumption that all geometric dimensions were the same, the stiff material fraction ψ was introduced. Based on explicit dynamic finite element simulation by LS-DYNA, the in-plane dynamic responses of dual-material auxetic double arrowhead structure with negative Poisson's ratio were numerically studied. The effects of the stiff material fraction and the impact velocity on the in-plane impact resistance and energy absorption capacities were discussed in detail. In order to obtain better comprehensive performance, a functionally layered honeycomb model was established and the effects of the gradient forms on the peak crush force, specific energy absorption and plat-form stress were investigated. The results show that the platform stress has a great improvement and increases with the fraction of the stiff material, and the influence mechanism on the peak impact force and the specific energy absorption are significantly different from the others. Under the presupposition that the peak impact force was lower, the energy absorption capacity can be improved by reasonable designing gradient forms to realize the control of the energy absorption process. © 2021, Jilin University Press. All right reserved.
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页码：114 / 121
页数：7
相关论文
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