Research on Dynamic Constitutive Relation of Materials Taking Account of Damage Evolution and Fracture Law for High Speed Cutting

摘要：

The adiabatic shear, which may produce serrated chip, usually occurs for a large number of materials in high speed machining. Adiabatic shear band is an important damage model for metals under high-velocity deformation process. The damage evolution of micro-voids in adiabatic shear bands resulted in material fracture finally. Now the thermal softening effect, the strain rate harding effect and the strain harding effect have been discussed extensively in literature, but there is very little research on its damage effect. Based on the experiments of predecessors, this paper presents a new damage evolution equation that is dependent on strain, strain rate and is suitable for the description of voids damage evolution in adiabatic shear band. The corresponding rate-dependent constitutive relation taking account of damage evolution and temperature are proposed. The predicted results are in good agreement with the experiment datum.

关键词： High speed cutting Adiabatic shear band Dynamic constitutive relation Damage evolution High strain rate

作者: J.Q. Li T.T. Dong M.J. Wang

作者单位: Shenyang Ligong University, Shenyang 110168, China Dalian University of Technology, Dalian 116024，Ch Shenyang Ligong University, Shenyang 110168, China Dalian University of Technology, Dalian 116024，China

会议类型: 国际会议

会议名称: The 4th International Conference on High Speed Machining(第四届高速加工国际会议 ICHSM2010)

会议地点: 武汉

会议语种:英文

页码: 224-229

在线出版日期: 2011-05-28（万方平台首次上网日期，不代表论文的发表时间）