A Study On Effectiveness Of J-integral To Crack Occurrence In Steel Under Cyclic Loads Study on fracture of welded connections in steel structures under cyclic loads Based on nonlinear fracture mechanics Part 2

摘要

We examined the J-integral as the Fracture Parameter to the ductile crack occurrence when the steel with a crack receives the cyclic loading. We made the elasto-plastic analysis and calculated the J-integral by the finite element method and experiment to the simple specimen with a crack. Then, We made clear that the J-integral could be applied to crack occurrence. Moreover, we compared J- Integral in case of the crack occurrence and J_IC of the steel which has two co-linear notch, and we showed that the Ductile crack occurrence could be estimated by the Fracture Criteria used J-integral.