AZ31B镁合金断裂应变与应力三轴度的关系研究

摘要/Abstract

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。

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

Abstract:

Series of quasi-static tensile tests were conducted on smooth and notched round rod made of AZ31B magnesium 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 AZ31B 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.

Key words: AZ31B magnesium alloy, quasi-static tensile experiment, Johnson-Cook failure model, finite element simulation

中图分类号:

TG146.2

周梦成, 冯飞, 胡建华, 雷雨, 何鹏, 黄尚宇, 邹方利. AZ31B镁合金断裂应变与应力三轴度的关系研究[J]. 中国机械工程, 2015, 26(5): 694-698.

Zhou Mengcheng, Feng Fei, Hu Jianhua, Lei Yu, He Peng, Huang Shangyu, Zou Fangli. Research on Relationship of AZ31B Magnesium Alloy Fracture Strain and Stress Triaxiality[J]. China Mechanical Engineering, 2015, 26(5): 694-698.

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