中南大学学报（自然科学版）2025，Vol.56Issue(3)：932-940,9.DOI:10.11817/j.issn.1672-7207.2025.03.011
考虑喷丸残余应力的齿根裂纹扩展计算方法
Calculation method of root crack propagation considering residual stress of shot peening
摘要
Abstract
In order to solve the problem of lack of calculation method for crack propagation under the influence of shot peening residual stress,firstly,based on the theory of linear elastic fracture mechanics,the modified Paris method was used to construct the crack propagation model by coupling the residual stress and crack closure effect.The specific influence of residual stress field on crack propagation behavior under different shot peening conditions was analyzed.Secondly,a computational method for residual stress-induced crack propagation was proposed by integrating a single-tooth preset crack propagation model and a finite element-discrete element(FEM-DEM)shot peening model,and the residual stress field with different shot peening parameters was obtained.Finally,the influence of the combined stress field of shot peening residual stress and root bending stress on the crack propagation behavior of the tooth root was investigated.The results show that shot peening significantly reduces the stress intensity factor at the crack tip within the residual compressive stress region.Shot peening increases the crack closure force and enhances the crack closure effect.This increases the crack propagation threshold and effectively inhibits the crack growth.The inhibitory effect of residual stress is the most pronounced in the subsurface region,but gradually weakens as crack depth increases.关键词
喷丸强化/疲劳裂纹扩展/残余应力/数值模拟/应力强度因子Key words
shot peening/fatigue crack propagation/residual stress/numberical simulation/stress intensity factor分类
金属材料引用本文复制引用
徐向阳,时慧一,樊林放..考虑喷丸残余应力的齿根裂纹扩展计算方法[J].中南大学学报（自然科学版）,2025,56(3):932-940,9.基金项目
国家重点研发计划项目(2023YFB4203402) （2023YFB4203402）
国家自然科学基金资助项目(52375042)(Project(2023YFB4203402)supported by the National Key Research and Development Program of China （52375042）
Project(52375042)supported by the National Natural Science Foundation of China) （52375042）
