| 摘要: |
| 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。 |
| 关键词: 多层规则排列圆形铝蜂窝 能量吸收模型 单位体积最优能量吸收 最优能量吸收效率 缓冲性能优化 |
| DOI： |
| 分类号:TB485.1 |
| 基金项目:陕西省自然科学基金项目（2010JQ1011）； 陕西省教育厅专项研究计划项目（11JK0534）； 陕西科技大学博士启动金项目（BJ12-15）； 陕西省 2013 年大学生创新创业训练项目 ； 2014年大学生创新创业训练项目 |
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| Cushioning Optimization of Multilayer Regularly-arranged Circular Aluminum Honeycombs under In-plane Crushing Loadings |
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SUN De-qiang, LUO Xian-zhou, FANG Zhong-wang, ZHANG Xiao-qiang, GAO Fen, ZHAO Jian-wei
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Shaanxi University of Science and Technology， Xi′ an 710021， China
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| Abstract: |
| 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. |
| Key words: multilayer regularly-arranged circular honeycombs energy absorption model optimal energy absorption per unit volume optimal energy absorption efficiency cushioning performance optimization |
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