INTERACTION OF STRESS CORROSION CRACKING WITH LOW CY-CLIC FATIGUE USING TIME-INTEGRATION FRAMEWORK

Abstract

The numerical results of the stress corrosion cracking (SCC) have been different from those of experimental results. Recent research indicate that numerical results of the SCC are compatible if the Cyclic load (Fatigue) is considered while simulating the SCC crack, however, the mechanism to combine the fatigue and SCC has gained much attention and has been a hot area of research as SCC and fatigue crack follow different mechanism during propagation, earlier demands the stress intensity factor (K) to be constant while later needs change in stress intensity factor (Δ K). In this research, a mechanism has been developed to combine SCC and Fatigue crack propagation (referred as overall crack propagation, da/dN₀) based on film rupture, Paris regime, and Time-Integration Models. At the end the numerical results of the overall crack growth rate have been compared with results available in literature based on linear superposition methods. It has been observed that the da/dN₀ calculated based on Time-Integration Models generates results closer to the experimental values.