Crashworthiness of graded cellular materials: A design strategy based on a nonlinear plastic shock model

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• 作者：Jie Yang ; Shilong Wang ; Yuanyuan Ding ; Zhijun Zheng ; ^{zjzheng@ustc.edu.cn} ; Jilin Yu
• 关键词：Graded cellular materials ; Crashworthiness ; Density design ; R-PH idealization ; Shock model ; Finite element method
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：5 January 2017
• 年：2017
• 卷：680
• 期：Complete
• 页码：411-420
• 全文大小：2225 K
• 卷排序：680

文摘

A shock model is developed to guide the crashworthiness design of graded cellular materials. A much accurate material model, namely the R-PH idealization, is applied to the shock model. Differential equations are obtained to design the relative density distribution. A varying cell-size distribution method is developed to construct 3D graded cellular structures. Cell-based finite element models verify the design strategy based on the shock model. A scheme with restricting the shock strain is proposed to shorten the graded cellular rods.