Fatigue damage rule of a steel based on plastic strain
Ikai Yasushi; Qiang Shao; Yamamura Takeshi; Hiasa Yoshinori
Abstract:A fatigue damage rule of a structural steel based on plastic strain ranging from high-cycle to low-cycle fatigue regime is proposed, especially paying attention to load sequence effect. Four types of fatigue tests including i) constant strain amplitudes, ii) mean strain amplitudes, iii) surplus and iv) reversible strains against the foregoing haft cycle were conducted. The fatigue damage was evaluated at each half cycle, so that a loading sequence may be evaluated in a unique manner. The fatigue damage rule was optimized for these fatigue tests and also compared to rules by other researchers.