轻工机械2023，Vol.41Issue(6)：49-57,9.DOI:10.3969/j.issn.1005-2895.2023.06.007
基于有限体积应变能密度法的钎焊接头疲劳寿命研究
Fatigue Life of Brazed Joint Based on Finite Volume Strain Energy Density Method
摘要
Abstract
In order to evaluate the fatigue life of brazed joint,a fatigue life model for stainless steel brazed joint was constructed.Firstly,the basic properties and fatigue data of stainless steel brazed joint were obtained by tensile test and low cycle fatigue test.The fatigue life of brazed joint was evaluated by using the finite volume strain energy density method based on notch stress intensity factor(NSIF),combined with finite element and theoretical calculation,and considering the residual stress after brazing.The finite element calculation results show that NSIF can accurately describe the residual stress near the weld,and the strain energy density is less sensitive to the mesh precision.Finally,the relationship model between the total strain energy density and fatigue life is established by combining the fatigue test results with the calculated strain energy density,which provides a simple and efficient method for the life evaluation of stainless steel brazed joint.关键词
疲劳强度/钎焊接头/应力强度因子/应变能密度法Key words
fatigue strength/brazed joint/stress intensity factor/strain energy density method分类
矿业与冶金引用本文复制引用
蒋雨生,杨新俊,张迪..基于有限体积应变能密度法的钎焊接头疲劳寿命研究[J].轻工机械,2023,41(6):49-57,9.基金项目
国家重点研发计划:高频振荡管疲劳断裂机理与长寿命设计(子课题编号:2018YFA0704604-1). （子课题编号:2018YFA0704604-1）
