Abstract
This article describes the methodology for determining the parameters and constants of the Lemaitre-type damage model based on 25Cr1Mo1V steel. The model implements the Voce isotropic hardening and Armstrong-Frederick kinematic hardening laws. The algorithm for identifying constants and parameters is based on standard uniaxial tension tests to describe isotropic hardening, and low-cycle fatigue tests to determine damage model constants and kinematic hardening parameters. The method is valid for all alloys whose behavior patterns can be described by the presented model representations. On the basis of the found constants and parameters, cyclic loading of cylindrical specimens was simulated with the finite element method and a fatigue curve for 25Cr1Mo1V steel was obtained. A good agreement between the experimental and predicted fatigue life was achieved.
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