华中科技大学学报（自然科学版）2025，Vol.53Issue(10)：84-90,7.DOI:10.13245/j.hust.250583
含初始变形薄板焊接结构应力放大和疲劳评估
Stress amplification and fatigue evaluation of thin plate welded structure with initial deformation
摘要
Abstract
To solve the problem that various welding deformations were easy to occur in the welding process of thin-plate welded joints,causing additional stress concentration effect,and thus reducing the fatigue performance of welded structures,considering the influence of initial welding deformation of thin-plate welded structures,the calculation formula of stress amplification factor at welded corners was revised and improved,and the fatigue strength of thin-plate aluminum alloy welded joints was evaluated by using this formula.Through the fatigue test of 5083 aluminum alloy thin plate welded structure,the life data of butt welded joints under different tensile loads were obtained,and the finite element results of actual welded joints were compared with the formulas,and meanwhile the errors were compared with other theoretical formulas.Results show that the notch stress method based on this formula can be used to correct the stress amplification factor and evaluate the fatigue strength of thin-plate welded structures.Compared with the finite element calculation results,the error and standard deviation of the improved formula are 1.31％and 0.55,respectively,which has a good evaluation effect and establishes its accuracy and applicability in evaluating the welded joints of 5083 aluminum alloy thin plates.关键词
对接焊接接头/应力放大系数/焊接变形/疲劳评估/切口应力法Key words
butt welded joint/stress amplification factor/welding deformation/fatigue evaluation/notch stress method分类
交通运输引用本文复制引用
谌伟,彭靓,吴冠宇,邱屿..含初始变形薄板焊接结构应力放大和疲劳评估[J].华中科技大学学报（自然科学版）,2025,53(10):84-90,7.基金项目
国家自然科学基金资助项目(51609185). （51609185）
