A MULTIAXIAL FATIGUE STRAIN ENERGY DENSITY PARAMETER RELATED TO THE CRITICAL FRACTURE PLANE

Abstract

Abstract The cyclic strain energy density parameter W for the critical or failure plane has been successfully applied in predicting the multiaxial fatigue life of an iron‐base and a nickel‐base alloy. This parameter has the advantage of being independent of loading condition, allowing a universal energy‐life curve to be determined for a variety of torsion, tension and bending stress and strain states. The critical strain energy density parameter has been verified using experimental data obtained from tubular and notched specimens of SAE‐1045 steel and Inconel 718.