Investigation of mesh dependency of materials fracture in the finite element simulation of a projectile penetrating into a target

摘要：

　　In finite element numerical simulation, the calculating results of geometrical models with different mesh density tend to have obvious differences, especially when material damage and fracture are considered.In order to study the mesh dependency of the finite element calculation, models of a projectile penetrating into the target with different mesh densities are constructed by using LS-DYNA.A nonlocal approach is investigated and the results without and with MAT_NONLOCAL are compared.It is found that the nonlocal model with a variable characteristic length parameter provides a relatively accurate and stable result, and the calculation cost can be reduced.

关键词： Finite element method Mesh dependency Nonlocal model

作者: Liu Jintao Fan Qunbo Cai Hongnian Li Guoju

作者单位: School of materials and science and engineering of Beijing Institute of Technology, Beijing 100081 P.R.China;National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081 P.R.China

会议类型: 国际会议

会议名称: 2014 SEM Fall Conference and International Symposium on Intensive Loading and Its Effects(国际实验力学学会2014年秋季会议、强化装载及其影响国际研讨会)

会议地点: 北京

会议语种:英文

页码: 207-213

在线出版日期: 2014-10-19（万方平台首次上网日期，不代表论文的发表时间）