【作者】 林德志； 张敏； 侯磊；

【Author】 LIN De-zhi~1,ZHANG Min~1,HOU Lei~(1,3) (1.School of Sciences,Shanghai University,Shanghai 200444,China; 2.Computational Sciences E-Institute of Shanghai Universities,Shanghai 200030,China)

【机构】 上海大学理学院； 上海高校计算科学E-研究院；

【摘要】 理解边界层与多孔蜂窝材料结构的非牛顿力学大变形理论是解决碰撞问题的有效方法。运用非线性计算方法模拟冲击碰撞粘滞弹塑性材料的非牛顿力学边界层现象,能够得到弹塑性的冲击碰撞应力场结果。使用有限元方法对碰撞条件下蜂窝结构的大变形进行分析,并通过三维建模软件,借助高性能计算平台计算显示出铝材料蜂窝结构在受冲击变形过程中的应力应变的变化规律以及蜂窝结构在不同接触压缩碰撞条件下产生的不同的形变。结果表明,蜂窝结构在不同冲击条件下,通过接触表面的变形能够吸收并消耗传递的能量,同时又能保持远离接触表面部分的材料结构相对稳定。更多还原

【Abstract】 It is an effective way to solve the impact problems with the moving boundary-layer theory and non-Newton method.The research on the theory and application for the complex non-Newtonian properties in various testing conditions have been interesting and difficult problems,especially in the auto-crash safety engineering process.The non-Newton boundary phenomenon with the visco-elastic-plastic material was simulated by using non-linear computing method, and got the result of stress field when impact happen.In this paper,we use FEM to simulate the deformation of aluminum honeycomb(HC)structure under the condition of compression and collision through the high performance computing (HPC)platform and three-dimensional modeling software,Oasys-Lsdyna.After detailed analysis we may summarize the results of the deformation for the honeycomb.It shows that,with different impact conditions,the honeycomb could absorb the energy by deforming the contact interface,while part of the structure that distant from the contact interface remain stable.更多还原