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Content available Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests
Wójcik Marta, Gontarz Andrzej, Skrzat Andrzej, Winiarski Grzegorz
Advances in Science and Technology. Research Journal
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2024
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Vol. 18, no 1
61--75
EN
The Chaboche-Lemaitre combined isotropic-kinematic hardening model (CKIH) gives an overall information about the material behaviour under cyclic loading. The identification of hardening parameters is a difficult and time-consuming problem. The procedure of the parameters identification using the experimental hysteresis curve obtained in a cyclic loading test under strain control is presented in details here for a S235JR construction steel. The last stabilized cycle extracted from the hysteresis curve is required for the identification of hardening parameters. The model with three backstresses is tested here. The optimization algorithm is also used for the improvement of the agreement between experimental and numerical data. In order to include some uncertainty of experiment and the identification procedure, the authorial algorithm written on the basis of the fuzzy logic soft-computing method is applied here. The results obtained show that the identification procedure presented in this paper ensures the good agreement between the experimental tests and numerical calculations. The correct selection of parameters associated with the hardening is essential for the right description of material behaviour subject to loading in different engineering problems, including in metal forming processes.
2
Content available The application of Chaboche model in uniaxial ratcheting simulations
Wójcik Marta, Skrzat A.
Advances in Manufacturing Science and Technology
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2020
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Vol. 44, nr 2
57--61
EN
This article presents the application of Chaboche nonlinear kinematic hardening model in simulations of uniaxial ratcheting. First, the symmetrical strain-controlled cyclic tension/compression tests for PA6 aluminum samples were done. Using the experimental stress–strain curve, initial material hardening parameters were determined by the ABAQUS software. The experimental curve was compared with the numerical one. For better fitting of both curves, the optimization procedure based on the least-square method was applied. Using the determined hardening parameters, numerical simulations of the ratcheting were done by the finite element analysis software. Numerical results were then compared with the experimental data obtained in the stress-controlled cyclic loading test.
3
Content available remote Approximation of the Norton–Hoff plasticity model with isotropic hardening through Cosserat plasticity
Bies P. M.
Archives of Mechanics
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2014
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Vol. 66, nr 1
37--54
EN
In this paper the regularizing properties of Cosserat elasto-plastic models in a geometrically linear setting are investigated. For vanishing Cosserat effects it is shown that the Norton–Hoff model with isotropic hardening is approximated by the model with microrotations.
4
Content available Interpretation of isotropic and kinematic hardening of materials
Grzywiński M., Kowalik M.
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
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2009
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Z. 15 (165)
81-85
EN
The purpose of the paper is to discuss the hardening problems in materials. Kinematic and isotropic hardening are considered. The paper has a review character.
PL
W pracy przedyskutowano problemy wzmocnienia materiałów. Analizowano zarówno wzmocnienie kinematyczne, jak i izotropowe. Praca ma charakter przeglądowy.
5
Content available remote Influence of Ggrain's Baterial on the Isotropic Hardening Function Coefficients in Compression Tests
Bajkowski J., Zalewski R.
Machine Dynamics Problems
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2006
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Vol. 30, No. 3
7-16
EN
Presented paper concerns problems connected with evaluation of the influence of a kind of granular materials on the isotropic hardening function parameters. All presented results are obtained form uniaxial compression probes on specially presented granular specimen.
6
Content available remote Modelling of isotropic and kinematic hardening in porous materials
Pokorska I.
Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
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2004
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Z. 10 (158)
143-156
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