平头压痕蠕变损伤实验的有限元模拟分析

对平头压痕蠕变实验进行了有限元模拟分析，重点考虑了受压材料的蠕变损伤．基于等效应力控制的蠕变损伤方程，在完成了Abaqus的Creep用户子程序的基础上对单相半无限大材料和薄膜／基体的两相材料系统的平头压痕蠕变损伤响应进行了有限元模拟．结果表明，蠕变压痕速率与材料的损伤参量相关，也与压头大小以及薄膜厚度／压头直径之比有关．与无损伤材料一样，也可以通过压痕蠕变损伤实验来得到受压材料的蠕变损伤规律．

Finite Element Analysis of the Creep Damage IndentationTesting with Flat Indenter

The creep indentation testing with cylindrical flat indenters has been simulated by the finite element method with special attention on the creep damage of the indented materials. For the equivalent-stress-controlled-damage materials, the user subroutine Creep has been programmed for Abaqus, which is used to analyze the one-phase half-infinite material and thin-film/substrate material systems. It is found that the creep indentation depth rate is influenced by the damage parameters of the indented materials as well as the size of the indenters and the ratio of the indenter size to thickness of the thin film. It is a possible, like that of the non-damage creep indentation experiments, to obtain the creep damage law of the indented materials from the creep damage indentation testing.