繰返し内圧および引張・圧縮を負荷した多軸応力状態におけるSUS316の疲労寿命特性

抄録

This paper discusses the effect of stress path on fatigue life of type 316 stainless steel. Load and pressure controlled fatigue tests at room temperature ware carried out using a hollow cylinder specimen under multiaxial loading by cyclic inner pressure and cyclic tension loading. Loading conditions were 5 types; they are cyclic pull loading, cyclic inner pressure loading, cyclic biaxial loading and two combination loadings by cyclic inner pressure and cyclic pull loading. Fatigue lives of the latter two combination loadings were reduced due to increase in cyclic ratchetting deformation, although that of the former three loadings could be evaluated by Mises’ equivalent stress.