Identification of Chaboche–Lemaitre combined isotropic–kinematic hardening model parameters assisted by the fuzzy logic analysis

Wójcik, Marta; Skrzat, A.

doi:10.1007/s00707-020-02851-z

Cited by 29 publications

(19 citation statements)

References 61 publications

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“…The methodology hardening parameters determination from cyclic Figure 10. The relationship between the extrusion force and the punch displacement loading tests was described in the author's previous works [31][32][33]. It allows achieving a good agreement between experimental and numerically generated stress-strain curves for cyclic loading tests.…”

Section: The Materials Modelmentioning

confidence: 99%

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The Coupled Eulerian-Lagrangian Analysis of the KOBO Extrusion Process

Wójcik¹,

Skrzat²

2021

Adv. Sci. Technol. Res. J.

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The KOBO extrusion is an unconventional elastic-plastic deformation process in which the phenomenon of changing a path of plastic deformation due to die cyclic oscillations by a given angle and with a given frequency is applied. As the result of the application of the oscillating rotary motion of the die, the reduction of the extrusion force was obtained. The numerical study of the KOBO extrusion of metallic materials was presented in this paper. The three-dimensional coupled Eulerian-Lagrangian (CEL) analysis was applied. The relationship between the extrusion force and the punch displacement during the KOBO process was achieved. The effective plastic strain distribution in the butt was found. The results of the numerical computations were compared with the experimental data. The influence of the material hardening parameters on the cyclic loading phenomena (ratcheting, mean stress relaxation) in terms of the course of the KOBO extrusion was also examined. The proper determination of the material hardening parameters can help to optimize the KOBO process in terms of the reduction the extrusion force and the choice of the amount of die oscillations.

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Section: The Materials Modelmentioning

confidence: 99%

“…The hardening parameters, for which the discrete error norm was the smallest, were assumed to be optimal. This unique procedure of the determination of hardening parameters using the fuzzy logic was described in details in [31][32][33].…”

Section: The Materials Modelmentioning

confidence: 99%

The Coupled Eulerian-Lagrangian Analysis of the KOBO Extrusion Process

Wójcik¹,

Skrzat²

2021

Adv. Sci. Technol. Res. J.

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“…59,60 A large number of cyclic-plastic models have thus emerged due to case-to-case basis modifications to the basic kinematic or isotropic hardening components which are applied to provide suitable predictions under different loading conditions. Subsequent studies on the calibration of parameters 44,47,[60][61][62][63][64][65] and analysis of sensitivity 45,61,66,67 of the various modified versions of CIKH model can be found in the literature, but a generalized approach is yet to emerge.…”

Section: Introductionmentioning

confidence: 99%

Estimation of cyclic hardening/softening and ratcheting response of materials through an algorithm to optimize parameters in Chaboche's hardening rule

Nath

Barai

Ray

2022

Fatigue Fract Eng Mat Struct

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A methodology considering Chaboche's isotropic-kinematic hardening (CIKH) model and genetic algorithm optimization technique is examined here to simulate the cyclic-plastic response for materials exhibiting cyclic hardening or softening behavior. The aim of the present report is to illustrate the inherent potential of this approach by assessing the closeness of fit of the obtained predictions to the experimental results for several materials like Z2CND18.12N, and 25CDV4.11 steels, OFHC copper, and INCONEL718 alloy. The obtained results were further subjected to comparative examinations with the available predictions to demonstrate the adoptability of the suggested methodology for the cyclic hardening or softening materials. This proposed approach provides a single set of CIKH model parameters to replicate the stabilized hysteresis loops and cyclic hardening or softening behavior under symmetric strain-controlled loading, as well as ratcheting characteristics under asymmetric stresscontrolled cycling, and is thus generalized in nature.

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“…In the following step, the remaining parameters responsible for the isotropic hardening are determined by approximating the curve of the yield stress vs. plastic strain. Wójcik and Skrzat [15,16] developed a material parameter evaluation algorithm which utilizes some analytical formulas for calculating the theoretical stress values that are further used within the least squares optimization process. In this concept the fuzzy logic methods are applied in order to improve the curve-fitting quality.…”

Section: Introductionmentioning

confidence: 99%

A new method for identification of cyclic plasticity model parameters

Suchocki

Kowalewski

2022

Archiv.Civ.Mech.Eng

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In this study, a new method for determining the material parameters of cyclic plasticity is presented. The method can be applied to evaluate the model parameters from any loading histories measured experimentally. The experimental data require basic processing only to be utilized. The method can be applied to calibrate the parameters of different elastoplastic models such as the Chaboche–Rousselier (Ch–R) constitutive equation or other model formulations which use different rules of isotropic hardening. The developed method was utilized to evaluate the material parameters of copper for a selected group of constitutive models. It is shown that among the considered model formulations a very good description of the mechanical properties of copper is achieved for the Ch–R model with two Voce terms used for simulating the isotropic hardening and two backstress variables utilized for capturing the kinematic hardening behavior. Furthermore, it is demonstrated that a model calibrated using the cyclic tension/compression data is able to properly capture the material response in torsion. Similarly, when the constitutive parameters are determined using the cyclic torsion data the model is able to properly reproduce the material behavior in tension/compression. It is concluded that for the considered type of constitutive equations the material parameters can be identified from a single mechanical test. The proposed methodology was validated using the relations derived analytically

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Identification of Chaboche–Lemaitre combined isotropic–kinematic hardening model parameters assisted by the fuzzy logic analysis

Cited by 29 publications

References 61 publications

The Coupled Eulerian-Lagrangian Analysis of the KOBO Extrusion Process

The Coupled Eulerian-Lagrangian Analysis of the KOBO Extrusion Process

Estimation of cyclic hardening/softening and ratcheting response of materials through an algorithm to optimize parameters in Chaboche's hardening rule

A new method for identification of cyclic plasticity model parameters

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