论文部分内容阅读
通过量纲分析和有限元数值仿真,建立对应Vickers压头和面角为172°的四棱锥压头的特征应力和特征应变与压入比功的函数关系式,并建立了基于压入比功的金属材料塑性参数仪器化压入识别方法。根据识别方法的精度分析结果,确定条件屈服强度σ0.5和应变硬化指数n为金属材料塑性参数识别的目标参数。6061铝合金、S45C碳钢、SS316不锈钢、SS304不锈钢和黄铜5种金属材料条件屈服强度σ0.2的识别误差均为-14.4%~4.0%,应变硬化指数n的识别误差均为-0.009~0.063,满足工程需要;验证了所建立的金属材料塑性参数仪器化压入识别方法的有效性。
Through the dimensional analysis and finite element numerical simulation, the relationship between the characteristic stress and the characteristic strain and the specific work force of the quadrangular pyramid indenter corresponding to the Vickers indenter and the 172 ° face angle is established, The plastic parameters of metal materials into the instrument identification method. According to the accuracy analysis results of the identification method, the conditional yield strength σ0.5 and the strain hardening index n are determined as the target parameters for the plastic parameter identification of metal materials. The identification errors of conditional yield strength σ0.2 of 6061 aluminum alloy, S45C carbon steel, SS316 stainless steel, SS304 stainless steel and brass are all -14.4% ~ 4.0%, the identification errors of strain hardening index n are -0.009 ~ 0.063, to meet the engineering needs; verify the effectiveness of the established plastic material parameters into the identification method.