Modeling strain rate effect for heterogeneous brittle materials

作者：Ma Guowei^*; Dong Aiai; Li Jianchun

来源：Transactions of Tianjin University, 2006, 12(SUPPL.): 79-82.

• Brittle materials
• Heterogeneity
• Smoothed particle hydrodynamics method
• Strain rate effect

Rocks are heterogeneous from the point of microstructure which is of significance to their dynamic failure behavior. Both the compressive and tensile strength of rock-like materials is regarded different from the static strength. The present study adopts smoothed particle hydrodynamics (SPH) which is a virtual particle based meshfree method to investigate strain rate effect for heterogeneous brittle materials. The SPH method is capable of simulating rock fracture, free of the mesh constraint of the traditional finite element and finite difference models. A pressure dependent J-H constitutive model involving heterogeneity is employed in the numerical modeling. The results show that the compressive strength increases with the increase of strain rate and tensile strength, which is important to the engineering design.

• 出版日期2006
• 单位Nanyang Technological University(Singapore); Nanyang Technological University, Singapore; NanYang Technological University, Singapore