Fatigue Crack Propagation Behaviors of Explosively Clad Steel Plates

Abstract

Fatigue crack propagation behaviors of explosively clad steel plates were studied by making fatigue crack propagation tests under a constant stress intensity factor range and by carring out a FEM elasto-plastic analysis of fatigue crack growth. The effects of the initial residual stress, hardening layer and yield point of each original material on crack propagation were examined. It was concluded from these examinations that for explosively clad materials which had a clad interface, residual stresses and a hardening layer near the interface, the fatigue crack propagation rate was not related to the stress intensity factor range ΔK, but closely to the maximum strain range at the crack tip, Δε_y^max.