Abstract:An investigation into crack retardation behavior for variable magnitude single overloads and block overloads is conducted on some aluminum alloys. Plasticity zone interactions and plasticity induced crack closure has been used to obtain fatigue crack growth rates in the simulation study of this investigation. The relationship between Over Load Ratio (OLR) and retardation parameter is developed and provides an insight into nonlinear behavior of overloads on fatigue growth. Thus, the lacunae in Wheeler's model p… Show more
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