A Modified Fatigue Life Prediction Model for Cyclic Hardening/Softening Steel.

ABSTRACT: The accumulation of fatigue damage is primarily caused by cyclic plastic deformation. In low-cycle fatigue, cyclic plastic deformation is the dominant deformation mode. In high-cycle fatigue, although most deformation is elastic, plastic deformation may still occur in localized regions of stress concentration and plays a critical role in the initiation of fatigue cracks. Considering that cyclic plastic deformation can be characterized by hysteresis loops, this study modifies the flow stress equation and the cyclic plastic deformation relationship based on stress-strain hysteresis loops at half-life cycles under different strain amplitudes. An improved model for life prediction that incorporates the effects of strain amplitude is proposed. The results of experiments on 310S stainless steel

SUBMITTER: Shen Z 

PROVIDER: S-EPMC12298996 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature