燕山大学学报2024，Vol.48Issue(1)：11-18,8.DOI:10.3969/j.issn.1007-791X.2024.01.002
基于韧性断裂准则的AZ31B镁合金板材成形极限预测
Prediction of forming limit of AZ31B magnesium alloy sheet based on ductile fracture criterion
摘要
Abstract
Combining the damage initiation criterion and the damage evolution criterion,a complete ductile fracture criterion was established to predict the fracture failure of the sheet.The constitutive model and the damage evolution parameters were obtained by fitting the uniaxial tension stress-strain curve.The finite element model was established based on the Nakazima hemispherical punch bulging experiment,and the ductile fracture criterion was used to predict the forming limit diagram(FLD)of AZ31B magnesium alloy at room temperature.The influence of the fracture failure criterion and strain path transition criterion on the prediction of forming limit diagram was discussed.The results indicated that by using the strain path transition during the damage evolution as the fracture failure criterion,the predicted FLD is in good agreement with the experimental results.关键词
损伤准则/韧性断裂准则/AZ31B镁合金/成形极限Key words
damage criterion/ductile fracture criterion/AZ31B magnesium alloy/forming limit分类
矿业与冶金引用本文复制引用
张瑞昭,孔博炜,崔忠冠,陈伟,任丽梅..基于韧性断裂准则的AZ31B镁合金板材成形极限预测[J].燕山大学学报,2024,48(1):11-18,8.基金项目
国家自然科学基金资助项目(51704262) （51704262）
河北省自然科学基金资助项目(E2020203057) （E2020203057）
