CAJ | 학술논문

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。
통과량강분석화유한원수치방진，건립대응Vickers압두화면각위172°적사릉추압두적특정응력화특정응변여압입비공적함수관계식，병건립료기우압입비공적금속재료소성삼수의기화압입식별방법。근거식별방법적정도분석결과，학정조건굴복강도σ0.5화응변경화지수n위금속재료소성삼수식별적목표삼수。6061려합금、S45C탄강、SS316불수강、SS304불수강화황동5충금속재료조건굴복강도σ0.2적식별오차균위-14.4％～4.0％，응변경화지수 n적식별오차균위-0.009～0.063，만족공정수요；험증료소건립적금속재료소성삼수의기화압입식별방법적유효성。
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 .