This paper describes and presents an experimental program of low-cycle fatigue tests of austenitic stainless steel 08Ch18N10T at room temperature. The low-cycle tests include uniaxial and torsional tests for various specimen geometries and for a vast range of strain amplitude. The experimental data was used to validate the proposed cyclic plasticity model for predicting the strain-range dependent behavior of austenitic steels. The proposed model uses a virtual back-stress variable corresponding to a cyclically stable material under strain control. This internal variable is defined by means of a memory surface introduced in the stress space. The linear isotropic hardening rule is also superposed. A modification is presented that enables the cyclic hardening response of 08Ch18N10T to be simulated correctly under torsional loading conditions. A comparison is made between the real experimental results and the numerical simulation results, demonstrating the robustness of the proposed cyclic plasticity model.

Comtes FHT a s Průmyslová 995 334 41 Dobřany Czech Republic

Department of Applied Mechanics Faculty of Mechanical Engineering VSB Technical University of Ostrava 17 listopadu 2172 15 70800 Ostrava Czech Republic

Department of Mechanics Biomechanics and Mechatronics Faculty of Mechanical Engineering Czech Technical University Prague Technicka 4 16000 Prague 6 Czech Republic

ÚJV Řež a s Hlavní 130 Řež 250 68 Husinec Czech Republic

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Special Issue: Mechanical Properties in Progressive Mechanically Processed Metallic Materials