Cyclic adaptive cohesive zone model to simulate ductile crack propagation in steel structures due to ultra‐low cycle fatigue

Abstract Micromechanics‐based continuum damage criteria have previously been developed to simulate the initiation of ductile fracture in structural steels under conditions with large‐scale plasticity where conventional mechanics indices are invalid. Such models combined methods crack growth for monotonic loading. In this study, a micromechanics‐based adaptive cohesive zone model simulating propagation loading is extended handle cyclic The proposed adaptively modifies traction–separation relationship opening and closure, as reverses between tension compression. approach implemented into finite element analysis platform WARP3D, results simulations that use compared data from coupon‐scale tests. demonstrate can accurately effect on specimen response, well other key aspects observed behavior, including face closure tunneling.