中文摘要：

针对316L奥氏体不锈钢进行了低周疲劳试验,采用有限元方法针对材料的循环特性进行了模拟计算。试验结果表明,该材料在不同应变范围下均表现出了明显的循环附加硬化,且硬化程度随着应变范围的增加而更为明显。在Abaqus模拟计算中,使用非线性随动强化与各向同性强化的混合模型描述材料弹塑性行为。不同应变范围下,模拟得到的第二周次下的应力应变曲线与实验结果吻合较好,模拟得到的前20周的最大应力与实验结果的误差与应变范围有关,最大平均误差为3.20%。基于实验结果和模拟结果,采用能量方法进行疲劳寿命预测,预测结果均位于两倍分散带内。

英文摘要：

Low cycle fatigue tests were carried for 316L stainless steel and the material cyclic property was simulated by finite element method. The test results show that the significant cyclic additional hardening can be observed in different strain ranges and it is more evident with increase in strain range. The mixing model combined with the nonlinear kinematic hardening and the isotropic hardening is used to describe the elastic and plastic behavior. The simulation results of stress-strain agree well with the test results for the second cycle in different strain ranges. The error of the maximum stress for first 20 cycles between the simulation results and test results depends on the strain range and the maximum error is 3.20%. The energy approach is used to predict the fatigue life based on the test results and simulation results and the prediction results are in a factor-2 scatter band.