Fatigue fracture mechanism of amorphous materials from a density-based coarse-grained model

Abstract Fatigue fracture is a unique failure mode of materials induced by repeated loading and crucial for the long-term stability used in cars aeroplanes. progressive localised structural damage material subjected to cyclic loading. The minimum strain amplitude that causes such much less than material’s yield under simple This observation leads widespread belief threshold fatigue smaller monotonic continuous Here, we study physical mechanism low-cycle amorphous solids considering complex coupling between density, deformation (velocity), stress. Contrary common belief, find critical amplitude, i.e., onset irreversible deformation, same fractures. Experimental verification this prediction desirable.