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Open AccessArticle

Strain Range Dependent Cyclic Hardening of 08Ch18N10T Stainless Steel—Experiments and Simulations

1
Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technicka 4, 16000 Prague 6, Czech Republic
2
Department of Applied Mechanics, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17.listopadu 2172/15, 70800 Ostrava, Czech Republic
3
Comtes FHT, a. s., Průmyslová 995, 334 41 Dobřany, Czech Republic
4
ÚJV Řež, a. s., Hlavní 130, Řež, 250 68 Husinec, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2019, 12(24), 4243; https://doi.org/10.3390/ma12244243
Received: 18 November 2019 / Revised: 5 December 2019 / Accepted: 12 December 2019 / Published: 17 December 2019
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. View Full-Text
Keywords: austenitic steel 08Ch18N10T; cyclic plasticity; cyclic hardening; experiments; finite element method; low-cycle fatigue austenitic steel 08Ch18N10T; cyclic plasticity; cyclic hardening; experiments; finite element method; low-cycle fatigue
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MDPI and ACS Style

Fumfera, J.; Halama, R.; Procházka, R.; Gál, P.; Španiel, M. Strain Range Dependent Cyclic Hardening of 08Ch18N10T Stainless Steel—Experiments and Simulations. Materials 2019, 12, 4243.

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