THREE-DIMENSIONAL ELASTIC-PLASTIC ROLLING CONTACT ANALYSIS:
A COMBINED KINEMATIC AND ISOTROPIC WORK-HARDENING MATERIAL MODEL

Gabriel POPESCU

gpopescu65@yahoo.com

„Gh. Asachi” Technical University of Iasi, Romania

Abstract. Fatigue life of rolling bearings is strongly dependent on elastic-plastic material properties. A detailed description of material behavior can be obtained in the case of through-hardened steel by performing monotonic or half-compressive tests. Through-hardened bearing steel with high residual austenite content was modelled as combined isotropic and kinematic material with non-linear hardening. Parameters describing the influence of retained austenite are modelled by using the Armstrong-Frederick non-linear law. In the elastic-plastic analysis, Prandtl-Reuss equations were used in association with von Mises flow criterion. Cyclic evaluation of plastic strains is carried out, until shakedown is reached in both rolling elements.

Keywords: elastic-plastic analysis, kinematic and isotropic hardening, shakedown