Inhomogeneous deformation growth of a metal under cyclic loading and its influence on fatigue

Qin, Da-Wei; Ju, J. W.; Zhang, Keshi; Li, Zeshen

doi:10.1007/s00707-019-02560-2

Cited by 2 publications

(3 citation statements)

References 29 publications

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“…Simulating the nonlinear response of structures under a large number of cycles has been a bottleneck problem in the literature, especially when tens of thousands to millions of fatigue cycles are involved [7][8][9]. A simple load cycle is normally divided into many increments and iterations.…”

Section: Introductionmentioning

confidence: 99%

Combination of mean-field micromechanics and cycle jump technique for cyclic response of PA66/GF composites with viscoelastic–viscoplastic and damage mechanisms

Chen

Chatzigeorgiou

Robert³

et al. 2023

Acta Mech

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An accelerated micromechanics framework based on the extended Mori-Tanaka transformation field analysis (TFA) and cycle jump technique is proposed to predict the homogenized response of short glass fiber-reinforced polyamide 66 composites (PA66/GF) under a large number of loading cycles (> 100,000 cycles). The extended theory accounts for microscopic viscoelastic-viscoplastic and damage mechanisms, and realistic microstructures induced by the injection molding process. Toward this end, a number of training cycles are first conducted using the extended Mori-Tanaka TFA to obtain the global evolution functions of material state-dependent variables (SDVs) for each phase. These SDVs are extrapolated linearly to a certain jump length with the help of global evolution functions such that direct numerical simulation of the cycles during this interval can be skipped, leading to a large computational cost reduction. After the cycle jump, a set of complete cycles are performed based on the extrapolated SDVs using the Mori-Tanaka TFA simulation to re-establish the global evolution functions. The implementation of the cycle jump procedure is facilitated by introducing an extrapolation control function to allow adaptive jump size control as well as to minimize the extrapolating error. The capabilities of the extended theory with the cycle jump technique have been validated extensively vis-à-vis cycle-by-cycle benchmark calculations under various loading conditions. It has been further verified with the experimental results of actual PA66/GF composites under high-cycle loading beyond which the cycle-by-cycle simulations can achieve.

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Section: Introductionmentioning

confidence: 99%

Combination of mean-field micromechanics and cycle jump technique for cyclic response of PA66/GF composites with viscoelastic–viscoplastic and damage mechanisms

Chen

Chatzigeorgiou

Robert³

et al. 2023

Acta Mech

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“…The well‐known Chaboche's isotropic‐kinematic hardening (CIKH) model and its various modified versions to capture the non‐proportionality effects, large strain effects, temperature effects, and the loading rate dependency has been extensively used to examine the cyclic‐plastic response of different materials 46–57 . The calibration procedure associated with the determination of the parameters of the Chaboche's isotropic‐kinematic hardening (CIKH) model is typically based on trial and error approaches.…”

Section: Introductionmentioning

confidence: 99%

“…44,45 The well-known Chaboche's isotropic-kinematic hardening (CIKH) model and its various modified versions to capture the non-proportionality effects, large strain effects, temperature effects, and the loading rate dependency has been extensively used to examine the cyclic-plastic response of different materials. [46][47][48][49][50][51][52][53][54][55][56][57] The calibration procedure associated with the determination of the parameters of the Chaboche's isotropic-kinematic hardening (CIKH) model is typically based on trial and error approaches. The parameters of the CIKH model are initially estimated from the nature of the experimental cyclic stress-strain response, and are subsequently finetuned to have simulations which are in good agreement with the experimental observations on various material.…”

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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Inhomogeneous deformation growth of a metal under cyclic loading and its influence on fatigue

Cited by 2 publications

References 29 publications

Combination of mean-field micromechanics and cycle jump technique for cyclic response of PA66/GF composites with viscoelastic–viscoplastic and damage mechanisms

Combination of mean-field micromechanics and cycle jump technique for cyclic response of PA66/GF composites with viscoelastic–viscoplastic and damage mechanisms

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

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