The purpose of this study is to generalize P-curve for strain range condition focusing on crack initiation life and crack growth life. The fatigue tests under different constant strain range conditions were conducted in air and the observation of fatigue cracks on specimen surface was also conducted. Using data derived from experiment, dispersion of cry using two-parameter Weibull distribution. Furthermore, the relationship between strain range and shape parameter or scale parameter of crack initiation mo...
英字タイトル:
Study on fatigue crack initiation model in air for type 316 stainless steel

Cumulative Usage Factor (CUF) is currently used for fatigue design and management to prevent fatigue failure. Fatigue damage is evaluated by CUF but CUF doesn’t show the real extent of fatigue damage and cannot be used for probabilistic index for risk assessment. Therefore, in order to clarify relation between CUF and damage state, the introduction of postulated crack growth curve (P-curve) of stainless steel was examined by Kamaya [1]. This curve was defined by single crack growth curve made from fati...
英字タイトル:
Study on Fatigue Crack Growth Prediction Model of Carbon Steel based on Surface Observation of Fatigue Test Specimen