摘要
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。
Method for determining the plastic properties of metals based on the ratio of indentation works was proposed based on the functional relationships between representative stress , representative strain and the ratio of indentation works which were es-tablished with the aid of dimensional analysis and finite element simulation .0.2% yield strength and strain hardening exponent were suggested to be the target parameters based on the accuracy analysis of the method . The errors of 0.2% yield strength and strain hardening exponent of 6061 aluminum alloy , S45C carbon steel , SS316 stainless steel , SS304 stainless steel and brass were from -14.4% to 4.0% and from -0.009 to 0.063 ,which satisfied the need of engineering application and verified the ef-fectiveness of the method .
出处
《塑性工程学报》
CAS
CSCD
北大核心
2014年第3期89-97,共9页
Journal of Plasticity Engineering
关键词
仪器化压入
条件屈服强度
应变硬化指数
特征应力
特征应变
instrumented indentation
0.2％ yield strength
strain hardening exponent
representative stress
representative strain
