Numerical Modeling of Plasticity-Induced Fatigue Crack Growth Retardation Due to Deflection in the Near-Tip Area

This article studies the retardation effect in plasticity-induced fatigue crack growth rate for a low-medium strength steel, due to appearance of microdeflections path. To this end, finite element method was used model with its kinked tip under several stress intensity factor (SIF) ranges. The results allowed calculation (after small number cycles) propagation multiaxial and uniaxial configurations at microscopic level. It observed that rose an increase initial angle, projected length, decrease SIF range.