AZ31B镁合金断裂应变与应力三轴度的关系研究  

Research on Relationship of AZ31B Magnesium Alloy Fracture Strain and Stress Triaxiality

作　　者：周梦成[1] 冯飞[1] 胡建华[1] 雷雨[1] 何鹏[1] 黄尚宇[1] 邹方利[1] 

机构地区：[1]武汉理工大学,武汉430070

出　　处：《中国机械工程》2015年第5期694-698,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50875192;51205298);材料成形与模具技术国家重点实验开放基金资助项目(2010-P08)

摘　　要：对AZ31B镁合金光滑圆棒和缺口圆棒进行了系列准静态拉伸试验,采用ABAQUS对各试样拉伸过程进行了模拟分析。拟合得到了Johnson-Cook断裂失效模型的部分材料常数,建立了AZ31B镁合金断裂应变与应力三轴度的关系模型。将建立的失效模型输入到ABAQUS中进行仿真模拟,模拟结果与试验结果基本一致,验证了断裂失效模型的正确性。Series of quasi-static tensile tests were conducted on smooth and notched round rod made of AZ31 Bmagnesium alloy.ABAQUS software was used to simulate the tensile process of each sample.Part material constants of Johnson-Cook fracture failure model were fitted out,and the relational model between fracture strain and stress triaxiality of AZ31 B magnesium alloy were established.Inputing the fracture failure model into ABAQUS for simulation,the simulation results and experimental results are basically consistent,thus the correctness of the fracture failure model was verified.

关 键 词：AZ31B镁合金 准静态拉伸试验 Johnson-Cook失效模型 有限元模拟 

分 类 号：TG146.2[一般工业技术—材料科学与工程]