Sensitivity of numerically modelled crack closure to material

Crack closure is a phenomenon which slows down fatigue crack propagation and leads to higher residual life of components change in the front curvature. Because significant impact on growth rate, scientific engineering community has been trying describe this very precisely. One most frequently described mechanisms plasticity-induced (PICC) dominant Paris regime. In presented work, CT specimen modelled three-dimensionally PICC estimations have done for different models materials investigate their sensitivity. The were cyclically loaded by forces inducing maximal stress intensity factor 17 MPa√m at load ratio R = 0.1. was curved according conducted experiments. Even though Newman's equation estimates almost constant, differences observed from finite element simulations.