Journal ArticleDOI
A polycrystalline model for the description of ratchetting : effect of intergranular and intragranular hardening
Georges Cailletaud,Kacem Saï +1 more
TLDR
In this article, numerical simulations for predicting uni-and multi-axial ratchetting behaviors are carried out, using a polycrystal plasticity model, which is applied to simulate the experimental results from the literature for a 316 austenitic stainless steel and for a 1026 carbon steel.Abstract:
In this work, numerical simulations for predicting uni- and multi-axial ratchetting behaviors are carried out, using a polycrystal plasticity model. In this multi-scale modeling, the single crystal behavior is based on crystallographic slip (intragranular scale), whereas the polycrystal behavior is obtained from an explicit transition rule to calculate the local stresses and strains (intergranular scale). A systematic study is performed to show the effect of intergranular and intragranular hardening on the ratchetting behavior. For illustrative purposes, two examples are presented: the model is applied to simulate the experimental results from the literature for a 316 austenitic stainless steel and for a 1026 carbon steel. It was demonstrated that the polycrystalline model was successful in describing the inelastic behavior of the two considered materials adequately.read more
Citations
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Evaluation of cyclic plasticity models in ratcheting simulation of straight pipes under cyclic bending and steady internal pressure
TL;DR: In this article, the authors evaluated seven cyclic plasticity models for structural ratcheting response simulations, including bilinear, multilinear (Besseling), Chaboche, Ohno-Wang, Abdel Karim-Ohno and modified Ohnowang (Chen and Jiao).
Journal ArticleDOI
Macro versus micro-scale constitutive models in simulating proportional and nonproportional cyclic and ratcheting responses of stainless steel 304
TL;DR: Hassan et al. as mentioned in this paper evaluated two modified cyclic plasticity models in predicting a broad set of cyclic and ratcheting response of stainless steel 304, and the experimental responses used in evaluating the modified models included both proportional and nonproportional (biaxial) loading responses from Hassan and Kyriakides.
Journal ArticleDOI
Crystal plasticity based constitutive model of NiTi shape memory alloy considering different mechanisms of inelastic deformation
TL;DR: In this paper, a micromechanical constitutive model based on crystal plasticity is constructed to comprehensively describe the deformation behaviors of polycrystalline NiTi shape memory alloy under various thermo-mechanical loading conditions.
Journal ArticleDOI
A micromechanical constitutive model based on crystal plasticity for thermo-mechanical cyclic deformation of NiTi shape memory alloys
TL;DR: Based on crystal plasticity, a new micromechanical constitutive model is constructed to describe the cyclic deformation of polycrystalline NiTi shape memory alloy presented under different thermo-mechanical cyclic loading conditions as mentioned in this paper.
Journal ArticleDOI
Multi-mechanism models: Present state and future trends
TL;DR: The paper gives a review of the main features introduced in the multi-mechanism models, of the present possibilities and of further developments, and proposes of future development.
References
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Journal ArticleDOI
Continuum micro-mechanics of elastoplastic polycrystals
TL;DR: In this article, the internal inhomogeneities of stress and strain in an arbitrarily deformed aggregate of elasto-plastic crystals are evaluated theoretically using a tensor constitutive law of a general kind.
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On some modifications of kinematic hardening to improve the description of ratchetting effects
TL;DR: In this article, the authors consider several special kinematic hardening rules and their properties in tension-compression and select a particular rule which offers a good compromise, describing both the shape of the normal cyclic stress-strain relations and the ratchetting results.
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Kinematic hardening rules with critical state of dynamic recovery, part I: formulation and basic features for ratchetting behavior
Nobutada Ohno,J.-D. Wang +1 more
TL;DR: In this paper, a set of kinematic hardening rules for simulating rachetting behavior is presented, where each component has a critical state for its dynamic recovery to be activated fully.
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An extension of the self-consistent scheme to plastically-flowing polycrystals
M. Berveiller,André Zaoui +1 more
TL;DR: In this paper, a self-consistent scheme is proposed for an isotropic elasto-plastic approximation of the "constraint" tensor, which leads to an explicit interaction law, modified from that of E. k roner (1961), which takes elastosplastic accommodation into account via a simple scalar "accommodation function".
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Zur plastischen verformung des vielkristalls
TL;DR: In this article, the problem of Vielkristallplastizitat wird eine mathematisch and physikalisch korrekte Formulierung gegeben.