Fang WANG
金属学报(英文版)
A new model for the analysis of fatigue crack growth in the metal structures was proposed. This model shows a promising capability of explaining various fatigue phenomena. The new crack growth model is further completed by a continuous empirical formula for estimating the value of variable fracture toughness during crack propagation and a modified continuous equation for the crack tip stress/strain constraint factor used to calculate the stress intensity factor at the opening level. The prediction results are proved to agree well with the observed phenomena in test.
关键词:
Marine structures
,
Crack growth rate
,
Three dimensional stress state
,
Fracture toughness
,
Crack tip stress/strain constraint factor
