复合应力状态下裂纹形成的行为

Behavior of Fatigue Crack Formation under the Action of Combined Stresses

摘要: 以应力场强法为基础,研究非对称缺口构件的裂纹形成部位和寿命,提出了应力场强函数σ_FD,σ_FD该函数既考虑了危险部位处的应力值,又考虑了其附近损伤区的应力和应力梯度对裂纹形成的贡献。

Abstract: Formative position of fatigue crack, and fatigue life of asymmetric notched component are investigated.A stress field intensity function, which reflects effect of the equivalent stress at perilous point and that of the stresses and its gradient within the damage area on crack formation, is presented.