CAJ | 학술논문

对含有塑性应变非强化区的Ohno循环塑性本构方程关于应力、内变量计算和一致切线刚度矩阵计算的过程进行了分析,在此基础上编写了ABAQUS材料用户子程序UMAT.然后用该程序对316L不锈钢材料的应变对称拉压变幅循环、应变非对称拉压变幅循环、应变对称剪切(扭转)变幅循环和轴向拉压棘轮循环等塑性变形过程进行了数值模拟,所得结果合理地反映了材料相应试验过程中的现象.
대함유소성응변비강화구적Ohno순배소성본구방정관우응력、내변량계산화일치절선강도구진계산적과정진행료분석,재차기출상편사료ABAQUS재료용호자정서UMAT.연후용해정서대316L불수강재료적응변대칭랍압변폭순배、응변비대칭랍압변폭순배、응변대칭전절(뉴전)변폭순배화축향랍압극륜순배등소성변형과정진행료수치모의,소득결과합리지반영료재료상응시험과정중적현상.
In this paper, the algorithm procedure of Ohno constitutive equation with strain nonhard-ening region for computation of stress, internal variable and consistent tangent matrices is analyzed and discussed. A material user subroutine UMAT for ABAQUS software was composed according to the investigation mentioned above. By using this UMAT with ABAQUS software the symmetrical and unsymmetrical tension-compressed unequal amplitude strain cycle, symmetrical sheared unequal am-plitude strain cycle and tension-compressed ratcheting were simulated. The results are found fairly reasonable in describing the phenomena observed in experiment.