復合應力狀態下裂紋形成的行為

Behavior of Fatigue Crack Formation under the Action of Combined Stresses

摘要: 以應力場強法為基礎,研究非對稱缺口構件的裂紋形成部位和壽命,提出了應力場強函數σ_FD,σ_FD該函數既考慮了危險部位處的應力值,又考慮了其附近損傷區的應力和應力梯度對裂紋形成的貢獻。

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.