多层规则排列圆形铝蜂窝共面缓冲优化

目的在不同速度的共面冲击载荷条件下,实现多层规则排列圆形铝蜂窝缓冲性能的优化。方法建立有限元分析模型以得到缓冲力学参数,并通过简化的能量吸收模型来评估其缓冲性能。结果多层规则排列圆形铝蜂窝缓冲性能与动态峰应力和动态密实化应变有关,是由冲击速度、变形模式和相关结构参数共同决定的。结论通过数值结果分析,得到模型变形的临界速度、动态密实化应变和动态峰应力的经验公式,并详细地介绍了可行的缓冲优化方法。

Cushioning Optimization of Multilayer Regularly-arranged Circular Aluminum Honeycombs under In-plane Crushing Loadings

Objective To realize the cushioning optimization of multilayer regularly-arranged circular aluminum honeycombs under in-plane crushing loadings with high impact velocities. Methods A finite element model was introduced to obtain the cushioning mechanical parameters, and a simplified energy absorption model was used to evaluate the cushioning performance. Results The model showed that the cushioning performance was related to dynamic plateau stress and dynamic densification strain, and was jointly determined by the impact velocity, deformation mode and configuration parameters. Conclusion Empirical formulas of critical velocity of deformation mode transition, dynamic densification strain and dynamic plateau stress were obtained from the analysis of numerical results, and feasible cushioning optimization methods were introduced in detail.