Parameter Representation of Dynamic Equilibrium in Creep and Fatigue

Abstract

In this study, a set of two parameters was used to describe the state of dynamic equilibrium for hardening and softening behavior in a variety of metallic materials, subjected to cyclic and static loading conditions, temperatures, and strain rates in the range of practical interest. The parameters consisted of a time-temperature parameter and a cyclic stress-strain parameter. Stable or near-stable values of cyclic stress and strain and of creep rate were extracted from numerous sources in the literature. Values for each parameter were calculated from that data and their functional relationship was studied. Results suggest a single relationship between the two parameters for pure FCC metals for both creep and fatigue.