电焊机2024，Vol.54Issue(8)：91-96,6.DOI:10.7512/j.issn.1001-2303.2024.08.12
铝合金双面焊对接接头内部缺陷扩展行为分析
Analysis of Internal Defect Propagation Behavior of Aluminum Alloy Double-sided Welding Butt Joint
摘要
Abstract
In this study,the crack propagation behavior of internal defects in aluminum alloy double-sided welded butt joints under fatigue load was analyzed based on the joint simulation method of ABAQUS and FRANC3D.The accuracy of the symmetric model was verified by comparing with the stress intensity factor K and fatigue life N at the crack tip under differ-ent crack depth a in the full model of the welded joints.Based on the symmetric model,the fatigue propagation law of initial defects under different shape ratios(depth a/length 2c)was analyzed.The results show that when the depth a of the ellipti-cal defect is constant,the initial stress intensity gradually increases with the increasement of the defect length 2c,and the fa-tigue life of the specimen is significantly reduced.When the length of the long axis is increased by 3 times,the fatigue life is reduced by 50%.As the crack propagates,the ratio of a/c gradually approaches 1,that is,the shape is close to a circle.关键词
内部缺陷/仿真/形状比/裂纹扩展/疲劳寿命Key words
internal defects/simulation/shape ratios/crack propagation/fatigue life分类
矿业与冶金引用本文复制引用
刘韶庆,王皓宇,钱宏亮,陈志皓,刘钇洲,王苹..铝合金双面焊对接接头内部缺陷扩展行为分析[J].电焊机,2024,54(8):91-96,6.基金项目
山东省重大科技创新工程计划资助(2021ZDPT02) （2021ZDPT02）
