Relevant bibliographies by topics / Isotropic hardening

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Isotropic hardening'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Isotropic hardening"

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Moosbrugger, J. C. "Anisotropic Nonlinear Kinematic Hardening Rule Parameters From Reversed Proportional Axial-Torsional Cycling." Journal of Engineering Materials and Technology 122, no. 1 (July 14, 1999): 18–28. http://dx.doi.org/10.1115/1.482760.

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A procedure for determining parameters for anisotropic forms of nonlinear kinematic hardening rules for cyclic plasticity or viscoplasticity models is described. An earlier reported methodology for determining parameters for isotropic forms of uncoupled, superposed Armstrong-Frederick type kinematic hardening rules is extended. For this exercise, the anisotropy of the kinematic hardening rules is restricted to transverse isotropy or orthotropy. A limited number of parameters for such kinematic hardening rules can be determined using reversed proportional tension-torsion cycling of thin-walled tubular specimens. This is demonstrated using tests on type 304 stainless-steel specimens and results are compared to results based on the assumption of isotropic forms of the kinematic hardening rules. [S0094-4289(00)00301-7]
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HASHIGUCHI, Koichi, and Kazuo OKAMURA. "GS0301-107 Subloading crystal plasticity with isotropic and kinematic hardening." Proceedings of the Materials and Mechanics Conference 2015 (2015): _GS0301–10—_GS0301–10. http://dx.doi.org/10.1299/jsmemm.2015._gs0301-10.

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Jiang, Wei. "General Kinematic-Isotropic Hardening Model." Journal of Engineering Mechanics 125, no. 4 (April 1999): 487–90. http://dx.doi.org/10.1061/(asce)0733-9399(1999)125:4(487).

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Grammenoudis, P., and Ch Tsakmakis. "Isotropic hardening in micropolar plasticity." Archive of Applied Mechanics 79, no. 4 (April 29, 2008): 323–34. http://dx.doi.org/10.1007/s00419-008-0236-3.

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Rentmeester, Rikard, and Larsgunnar Nilsson. "On mixed isotropic-distortional hardening." International Journal of Mechanical Sciences 92 (March 2015): 259–68. http://dx.doi.org/10.1016/j.ijmecsci.2014.09.013.

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HAKANSSON, P., M. WALLIN, and M. RISTINMAA. "Comparison of isotropic hardening and kinematic hardening in thermoplasticity." International Journal of Plasticity 21, no. 7 (July 2005): 1435–60. http://dx.doi.org/10.1016/j.ijplas.2004.07.002.

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Chatterjee, Biplab, and Prasanta Sahoo. "Finite Element Based Unloading of an Elastic Plastic Spherical Stick Contact for Varying Tangent Modulus and Hardening Rule." International Journal of Surface Engineering and Interdisciplinary Materials Science 1, no. 1 (January 2013): 13–32. http://dx.doi.org/10.4018/ijseims.2013010102.

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Loading-unloading behavior of a deformable sphere with a rigid flat under full stick contact condition is investigated for varying strain hardening. The study considers various tangent modulus using the finite element software ANSYS. Both the bilinear kinematic hardening and isotropic hardening models are considered. Numerical simulation reveals the qualitative similarity between kinematic and isotropic hardening regarding the variation of interfacial parameters during loading-unloading for various tangent modulus. It is found that the material with kinematic hardening dissipates more energy than the material with isotropic hardening during unloading. However for elastic perfectly plastic material, the loading-unloading behavior is insensitive to hardening model.
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Borges, M. F., F. V. Antunes, P. A. Prates, and R. Branco. "A Numerical Study of the Effect of Isotropic Hardening Parameters on Mode I Fatigue Crack Growth." Metals 10, no. 2 (January 25, 2020): 177. http://dx.doi.org/10.3390/met10020177.

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The consideration of plastic crack tip opening displacement (CTOD, δp), as a crack driving force has given us the opportunity to predict fatigue crack growth (FCG) rate numerically, and, therefore, to develop parametric studies focused on the effect of loading, geometrical, and material parameters. The objective here is to study the effect of the isotropic hardening parameters of the Voce law on FCG, which are the isotropic saturation stress, YSat, and the isotropic saturation rate, CY. The increase of these hardening parameters causes δp to decrease. However, this effect is much more pronounced for YSat than CY. The variation is non-linear, and the rate of variation decreases with the increase of isotropic parameters. The increase of YSat increases the crack closure phenomenon. Finally, the influence of the isotropic parameters is more relevant for pure isotropic hardening than for mixed hardening.
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Khdir, Younis Kh. "Analytical and Numerical Investigation of Hardening Behavior of Porous Media." Polytechnic Journal 9, no. 2 (October 30, 2019): 1–10. http://dx.doi.org/10.25156/ptj.v9n2y2019.pp1-10.

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In this study, a comparative analysis is presented between a new proposed analytical model and numerical results for macroscopic behavior of porous media with isotropic hardening in its matrix. The macroscopic behavior of a sufficiently large representative volume element (RVE), with 200 identical spherical voids, was simulated numerically using finite element method and compared with elementary volume element that contains one void. The matrix of the porous material is considered as elasto-plastic with isotropic hardening obeys exponential law for isotropic hardening. A new parameter was added with exponential law for isotropic hardening to represent the new proposed analytical model for macroscopic isotropic porous hardening. The new added parameter B depended only on the porosity. The results of the new proposed analytical model were compared with numerical results for different types of cyclic loading. Very good agreements were found between the numerical results and the proposed analytical model.
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Muránsky, Ondrej, Cory J. Hamelin, Mike C. Smith, Phillip J. Bendeich, and Lyndon Edwards. "The Role of Plasticity Theory on the Predicted Residual Stress Field of Weld Structures." Materials Science Forum 772 (November 2013): 65–71. http://dx.doi.org/10.4028/www.scientific.net/msf.772.65.

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Constitutive plasticity theory is commonly applied to the numerical analysis of welds in one of three ways: using an isotropic hardening model, a kinematic hardening model, or a mixed isotropic-kinematic hardening model. The choice of model is not entirely dependent on its numerical accuracy, however, as a lack of empirical data will often necessitate the use of a specific approach. The present paper seeks to identify the accuracy of each formalism through direct comparison of the predicted and actual post-weld residual stress field developed in a three-pass 316LN stainless steel slot weldment. From these comparisons, it is clear that while the isotropic hardening model tends to noticeably over-predict and the kinematic hardening model slightly under-predict the residual post-weld stress field, the results using a mixed hardening model are quantitatively accurate. Even though the kinematic hardening model generally provides more accurate results when compared to an isotropic hardening formalism, the latter might be a more appealing choice to engineers requiring a conservative design regarding weld residual stress.
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Dissertations / Theses on the topic "Isotropic hardening"

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VALENTE, MARCELO MAGALHAES. "A THEORY OF ELASTIC-VISCOPLÁSTICAS BEAMS WITH KINEMATIC AND ISOTROPIC HARDENING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1993. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33229@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
Este trabalho apresenta uma teoria de vigas para metais e ligas metálicas a altas temperaturas que leva em conta o endurecimento cinemático e isotrópico induzidos pela plastificação. Apesar da não linearidade das equações constitutivas consideradas, propõe-se uma técnica numérica extremamente simples de solução, válida para diferentes tipos de carregamentos. Desta forma, é possível se fazer a baixo custo uma avaliação das tensões atuantes e das deformações permanentes induzidas por carregamentos complexos, o que é um passo fundamental no estudo da integridade de certos equipamentos industriais.
This work presents a theory of beams for metals and alloys at elevated temperature which takes into account the kinematic and isotropic hardening induced by plastic deformation. In spite of the strong non linearity of the constitutive equations, it is proposed a very simple numerical technique of solution which is valid is valid for any kind of loading. Consequently, the theory allows a low cost analysis of the stresses and strains in many structural elements used in industrial applications.
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White, Charles Samuel. "A combined isotropic-kinematic hardening model for large deformation metal plasticity." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14400.

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Geng, Lumin. "Application of plastic anisotropy and non-isotropic hardening to springback prediction /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488195154360632.

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Kpodekon, Crescent. "Effet du pré-écrouissage sur la durée de vie d'aciers austénitiques de type 304L." Phd thesis, INSA de Rouen, 2010. http://tel.archives-ouvertes.fr/tel-00581715.

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Le travail s'intéresse aux effets de l'histoire de chargement sur le comportement et la durée de vie en fatigue de deux nuances (THYSSEN et CLI)d'un acier inoxydable austénitique 304L à la température ambiante. Les essais ont été réalisés en utilisant deux catégories d'éprouvettes. Les éprouvettes de la première catégorie (vierges) ont été soumises à des essais classiques de fatigue,alors que celles de la deuxième ont subi, avant les essais de fatigue, un pré-écrouissage monotone ou cyclique en déformation imposée. Les éprouvettes vierges manifestent un adoucissement cyclique suivi d'un durcissement cyclique alors que les éprouvettes pré-écrouies ne présentent qu'un durcissement cyclique. Les résultats montrent une grande influence du pré-écrouissage qui semble bénéfique en contrainte imposée, mais néfaste en déformation imposée,même en présence d'une contrainte moyenne de compression. Ces résultats sont discutés en termes d'évolution cyclique du module d'élasticité, des écrouissages isotropes et cinématiques, et de la densité d'énergie absorbées par cycle, dans différentes configurations : avec ou sans pré-écrouissage, en contrainte ou déformation imposées...
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Belattar, Adel. "Analyses multi-échelles du comportement et la durée de vie d’aciers inoxydables 304L sous sollicitations cycliques avec pré-écrouissage." Thesis, Rouen, INSA, 2013. http://www.theses.fr/2013ISAM0004/document.

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Le travail s’intéresse aux effets d’un pré-écrouissage cyclique axial ou en torsion sur le comportement cyclique et la durée de vie en fatigue sous sollicitation axiale à température ambiante d’un acier inoxydable austénitique 304L. Les essais cycliques séquentiels à amplitude de déformation croissante ou décroissante montrent que la courbe cyclique du 304L est non-unique. Cette caractéristique est liée à la persistance de l’état microstructural généré pendant les cycles d’amplitude de déformation maximale de la première séquence. En augmentant le nombre des séquences, l’acier 304L montre une tendance vers une courbe cyclique asymptotique, l’écrouissage semble se stabiliser. Des essais de fatigue sous chargement axial ont été réalisés sur des éprouvettes vierges ou pré-écrouies en traction-compression ou en torsion. Les durées de vie ont été sensiblement réduites pour les éprouvettes pré-écrouies. Ce phénomène est lié à la formation de structures de dislocations denses héritées de la phase de pré-écrouissage. Cependant, l’augmentation de l’amplitude de déformation en fatigue réduit l’effet du pré-écrouissage
This study investigates the effects of loading history on the cyclic stress-strain curve and fatigue behavior of 304L stainless steel at room temperature. Tension-compression tests were performed ont the same specimen under controlled strain, using several loading sequences of increasing or decreasing amplitude. The results showed that fatigue life is significantly reduced by the previous loading history. A previously developed method for determining the effect of prehardening was evaluated. Microstructural analyses were also performed; the microstructures after preloading and their evolution during the fatigue cycles were characterized by TEM. The results of these analyses improve our understanding of the macroscopic properties of 304L stainless steel and can help us identify the causes of failure and lifetime reduction
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Lucchetta, Antoine. "Homogénéisation des composites élasto-viscoplastiques écrouissables par une double procédure variationnelle incrémentale." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS627.

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Dans cette thèse nous étudions le comportement de composites visco-élastiques linéaire, élasto-(visco)plastiques à écrouissages cinématique linéaire ou non linéaire et isotrope, ainsi que de composites plastiquement compressibles. Pour cela, nous nous appuyons sur les principes incrémentaux variationnels introduits par Lahellec et Suquet (2007). Nous tirons également parti d’une autre formulation récemment proposée par Agoras et al. (2016), consistant en une double application de la procédure variationnelle de Ponte-Castañeda (1991). La première application de la procédure variationnelle permet, après la résolution de conditions de stationnarité, de linéariser le comportement local en prenant en compte l’écrouissage. Ceci conduit à un Milieu Linéaire de Comparaison (MLC) thermo-élastique avec un champ de polarisation hétérogène par phase. La seconde application traite de l'hétérogénéité de la polarisation et donne lieu à un nouveau MLC thermo-élastique avec un champ de polarisation homogène par phase. Le comportement effectif peut ensuite être estimé par les schémas classiques d'homogénéisation linéaire, ici les bornes de Hashin et shtrikman. Les prévisions du modèle sont comparées aux résultats disponibles dans la littérature pour différents chargements. Un bon accord a été observé entre les prédictions du modèle proposé et les simulations numériques en champs complets. De nouveaux résultats pour les composites élasto-plastiques à écrouissage isotrope et à écrouissages cinématique linéaire ou non linéaire et isotrope sont également fournis. Ils sont en bon accord avec les calculs numériques que nous avons effectués, tant à l’échelle locale que macroscopique
In this thesis we investigate the behavior of linear viscoelastic composites, elasto-(visco)plastic composites with isotropic and linear or nonlinear kinematic hardening and plastically compressible composites. We first rely on the incremental variational principles introduced by Lahellec and Suquet (2007). We also take advantage of an alternative formulation, recently proposed by Agoras et al. (2016), which consists in a double application of the variational procedure of Ponte-Castañeda (1991). The first application of the variational procedure linearizes the local behavior, including hardening, and leads to a thermo-elastic Linear Comparison Composite (LCC) with a heterogeneous polarization field inside the phases. The second one deals with the heterogeneity of the polarization and results in a new thermo-elastic LCC with a per-phase homogeneous polarization field, which effective behavior can then be estimated by classical linear homogenization schemes, the Hashin et shtrikman bounds. The predictions of the model are compared with results available in the literature for different loadings. A good agreement has been observed between the predictions of the proposed model and numerical full field simulations. New results for elasto-plastic composites with isotropic and combined isotropic and linear or nonlinear kinematic hardening are also provided. They are in good agreement with the numerical computations we carried out, at both local and macroscopic scales
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Sehnal, Dominik. "Nízkocyklová životnost v podmínkách jaderné energetiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399581.

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Fatique life extension of nuclear powerplants lies in the search for project reserves. This work deals with the evaluation of low-cycle fatigue of nuclear installations of the VVER type and the assessment of the influence of the computational model level. Fatigue tests of austenitic steel using optical method of digital image correlation for which the evaluation procedure is designed and used is performed. Selected model of plasticity with kimenatic (Chaboche) and combinated hardening (Chaboche, Voce) are calibrated from the obtained data. Subsequently, the durability of the test specimen is determined by computational modeling for different material models. From the comparison of the results of fatigue tests with the calculation, the material models suitable for the description of fatigue life and their validity are determined.
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Kuprin, Corinna. "Verformungsverfestigung bei zyklisch inkrementeller Torsion von Reineisen und dem Stahl 42CrMo4N." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-103890.

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Die Arbeit widmet sich dem Fließverhalten von Stählen bei zyklisch inkrementeller Torsion. Dazu werden vergleichend Reineisen und der ferritisch-perlitische Stahl 42CrMo4N bei unterschiedlichen Verformungspfaden betrachtet. Vor allem in zyklischen Torsionsversuchen mit bleibendem Verformungsinkrement je Zyklus werden Fließkurvenverläufe und Verformungsverfestigung analysiert. Die Ergebnisse belegen den Einfluss des lamellaren Zementit auf das Fließverhalten des Stahls 42CrMo4N, während die Eigenschaften des Reineisens von der entstehenden Versetzungszellstruktur bestimmt werden. Die Richtungsabhängigkeit der Fließspannung und die Verläufe der Fließkurven unterscheiden sich für die betrachteten Werkstoffe deutlich. Fließortkurven dienen der quantitativen Beschreibung der Verfestigung. Die Vorgehensweise zu ihrer Ermittlung und ihre Abhängigkeit von den Versuchsbedingungen und den Verformungszuständen werden gezeigt. Bei Reineisen dominieren isotrope, bei dem Stahl 42CrMo4N kinematische Verfestigungsanteile das Fließverhalten
Ferritic-pearlitic steel 42CrMo4N and pure iron under different strain paths are compared regarding their flow behaviour. Mainly in cyclic torsion tests with resulting strain increment per cycle shear stresses and strain hardening are analysed. The results show, that the cementite lamellae determine the flow behaviour of the steel 42CrMo4N, whereas the properties of pure iron are governed by the evolving dislocation cell structure. The dependency of flow stress on the strain direction is different for the two materials. Yield surfaces describe strain hardening quantitatively. The procedure for yield point detection and the dependency of subsequent yield surfaces on experimental conditions and strain states is shown. For pure iron isotropic hardening, for steel 42CrMo4N kinematic strain hardening dominates the flow behaviour
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Jakel, Roland. "Grundlagen der Elasto-Plastizität in Creo Simulate - Theorie und Anwendung." Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-87141.

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Der Vortrag beschreibt die Grundlagen der Elasto-Plastizität sowie die softwaretechnische Anwendung mit dem FEM-Programm Creo Simulate bzw. Pro/MECHANICA von PTC. Der erste Teil des Vortrages beschreibt die Charakteristika plastischen Verhaltens, unterschiedliche plastische Materialgesetze, Fließkriterien bei mehrachsiger Beanspruchung und unterschiedliche Verfestigungsmodelle. Im zweiten Vortragsteil werden Möglichkeiten und Grenzen der Berechnung elasto-plastischer Probleme mit der Software dargestellt sowie Anwendungstipps gegeben. Im dritten Vortragsteil schließlich werden verschiedene Beispiele vorgestellt, davon besonders ausführlich das Verhalten einer einachsigen elasto-plastischen Zugprobe vor und nach dem Eintreten der Einschnürdehnung
This presentation describes the basics of elasto-plasticity and its application with the finite element software Creo Simulate (formerly Pro/MECHANICA) from PTC. The first part describes the characteristics of plastic behavior, different plastic material laws, yield criteria for multiaxial stress states and different hardening models. In the second part, the opportunities and limitations of analyzing elasto-plastic problems with the FEM-code are described and user information is provided. The last part finally presents different examples. Deeply treated is the behavior of a uniaxial tensile test specimen before and after elongation with necking appears
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Balsas, Andreia Cação. "Modelo constitutivo para previsão do comportamento cíclico da liga 7050-T6." Master's thesis, 2019. http://hdl.handle.net/10316/93629.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia
Esta dissertação teve como principal objetivo a implementação de um modelo constitutivo que caracterizasse a resposta elastoplástica cíclica da liga de alumínio AA 7050-T6 utilizando o software de elementos finitos ADINA®.A modelação do comportamento cíclico da liga foi feita com base em resultados experimentais obtidos através de ensaios de fadiga oligocíclica efetuados em controlo de amplitude de deformação total, entre 0,6% e 1,75%, e com razões de deformação de -1, 0 e 0,5. O modelo aplicado define o comportamento plástico cíclico do material através do critério de cedência de von Mises, de duas leis de encruamento: isotrópico e cinemático, e de uma regra de fluxo associada ao critério de von Mises. Através das leis de encruamento, respetivas ao modelo constitutivo, e pela metodologia abordada por Prates, [20], obteve-se uma aproximação inicial dos parâmetros de encruamento do material, tendo-se procedido com simulações numéricas dos ensaios de fadiga num sólido cúbico tridimensional. Posteriormente efetuou-se o ajustamento dos parâmetros através da análise comparativa entre as curvas de histerese de tensão-deformação experimentais e as resultantes das simulações numéricas, tendo-se conseguido simular com sucesso a resposta cíclica da liga quando solicitada em controlo de amplitude de deformação de 1,5% a 1%, com razão de deformação -1, 0 e 0,5 e de 1,75% e 0,8%, com razão de deformação de -1 e 0. Conclusivamente, o procedimento desenvolvido é suficientemente robusto para simular satisfatoriamente as formas dos circuitos estáveis, assim como, para determinar as densidades de energia de deformação plástica e total para as diferentes amplitudes e razões de deformação.
The main objective of this study was the implementation of a constitutive model able to characterize the cyclic elastoplastic response of the AA 7050-T6 aluminum alloy using the ADINA® finite element software. The modelling of the alloy's cyclic behavior was based on experimental results from low-cycle fatigue tests performed under strain-controlled mode with total strain amplitudes between 0,6% and 1,75% and strain ratios of -1, 0 and 0,5. The model defines the cyclic plastic behavior of the material according to the von Mises yield criterion, a flow rule related to it, and two hardening laws - isotropic and kinematic. Through the respective constitutive model hardening rules and the methodology used by Prates, [20], an initial estimate of the material hardening parameters was obtained, followed by numerical simulations of the fatigue tests on a tridimensional cubic solid.Afterwards, an adjustment was made to the parameters by means of a comparative analysis between the experimental stress-strain hysteresis loops and those obtained from the numerical simulations, resulting in the successful simulation of the alloy’s behavior, of low cyclic fatigue tests, in constant amplitude strain control of 1,5%, 1,25%, 1% (with strain ratios of -1, 0, 0,5), 1,75% and 0,8% (with strain ratios of -1 and 0). In conclusion, the procedure developed is sufficiently accurate to satisfactorily simulate the stable circuits shapes, as well as to determinate the total and plastic strain energy densities for the several amplitude and strain ratios.
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Books on the topic "Isotropic hardening"

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Freed, Alan David. A viscoplastic model with application of LiF-22%CaF₂ hypereutectic salt. [Washington, D.C.]: National Aeronautics and Space Administration, 1990.

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Book chapters on the topic "Isotropic hardening"

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Håkansson, Paul, and Matti Ristinmaa. "Isotropic/Kinematic Hardening in Thermoplasticity." In Encyclopedia of Thermal Stresses, 2585–95. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_887.

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Boehler, J. P. "On a Rational Formulation of Isotropic and Anisotropic Hardening." In Applications of Tensor Functions in Solid Mechanics, 99–122. Vienna: Springer Vienna, 1987. http://dx.doi.org/10.1007/978-3-7091-2810-7_6.

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da Costa Teixeira, Julien, Laure Bourgeois, Chad W. Sinclair, and Christopher R. Hutchinson. "Experimental Investigation of Isotropic and Kinematic Hardening in Al-3Cu-0.05Sn (wt%)." In Materials Science Forum, 1849–52. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.1849.

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Galdos, Lander, Julen Agirre, Nagore Otegi, Joseba Mendiguren, and Eneko Saenz de Argandoña. "Simulation of Cold Forging Processes Using a Mixed Isotropic-Kinematik Hardening Model." In Forming the Future, 773–87. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75381-8_64.

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Prassa, Chara, Sotiris Alevizos, Manolis Veveakis, and Yannis F. Dafalias. "The Effect of Rotational and Isotropic Hardening on the Onset of Compaction Bands." In Springer Series in Geomechanics and Geoengineering, 147–53. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56397-8_19.

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Balokhonov, Ruslan R., and Varvara A. Romanova. "Microstructure-Based Computational Analysis of Deformation and Fracture in Composite and Coated Materials Across Multiple Spatial Scales." In Springer Tracts in Mechanical Engineering, 377–419. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_17.

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AbstractA multiscale analysis is performed to investigate deformation and fracture in the aluminum-alumina composite and steel with a boride coating as an example. Model microstructure of the composite materials with irregular geometry of the matrix-particle and substrate-coating interfaces correspondent to the experimentally observed microstructure is taken into account explicitly as initial conditions of the boundary value problem that allows introducing multiple spatial scales. The problem in a plane strain formulation is solved numerically by the finite-difference method. Physically-based constitutive models are developed to describe isotropic strain hardening, strain rate and temperature effects, Luders band propagation and jerky flow, and fracture. Local regions experiencing bulk tension are found to occur during compression that control cracking of composites. Interrelated plastic strain localization in the steel substrate and aluminum matrix and crack origination and growth in the ceramic coating and particles are shown to depend on the strain rate, particle size and arrangement, as well as on the loading direction: tension or compression.
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Henia, Arfa, Bahloul Riadh, and Belhadj Salah Hedi. "Optimization of Single Point Incremental Forming of Sheet Metal with Isotropic and Combined Hardening Behavior." In Lecture Notes in Mechanical Engineering, 461–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37143-1_55.

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Müthing, Nina, Thomas Barciaga, and Tom Schanz. "On the Use of Isotropic Hardening Plasticity to Model Cyclic Consolidation of Fine Grained Soils." In Holistic Simulation of Geotechnical Installation Processes, 131–47. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23159-4_7.

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Martin, Katharina, Dennis Daub, Burkard Esser, Ali Gülhan, and Stefanie Reese. "Numerical Modelling of Fluid-Structure Interaction for Thermal Buckling in Hypersonic Flow." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 341–55. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_22.

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Abstract Experiments have shown that a high-enthalpy flow field might lead under certain mechanical constraints to buckling effects and plastic deformation. The panel buckling into the flow changes the flow field causing locally increased heating which in turn affects the panel deformation. The temperature increase due to aerothermal heating in the hypersonic flow causes the metallic panel to buckle into the flow. To investigate these phenomena numerically, a thermomechanical simulation of a fluid-structure interaction (FSI) model for thermal buckling is presented. The FSI simulation is set up in a staggered scheme and split into a thermal solid, a mechanical solid and a fluid computation. The structural solver Abaqus and the fluid solver TAU from the German Aerospace Center (DLR) are coupled within the FSI code ifls developed at the Institute of Aircraft Design and Lightweight Structures (IFL) at TU Braunschweig. The FSI setup focuses on the choice of an equilibrium iteration method, the time integration and the data transfer between grids. To model the complex material behaviour of the structure, a viscoplastic material model with linear isotropic hardening and thermal expansion including material parameters, which are nonlinearly dependent on temperature, is used.
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Oka, Fusao, and Sayuri Kimoto. "Simulation of Isotropic Cyclic Compression by an Elasto-viscoplasitc Constitutive Model Based on the Nonlinear Kinematic Hardening Rules." In Springer Series in Geomechanics and Geoengineering, 215–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32814-5_27.

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Conference papers on the topic "Isotropic hardening"

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Chung, Kwansoo. "Consistency condition for isotropic-kinematic hardening of anisotropic yield functions." In THE 11TH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN INDUSTRIAL FORMING PROCESSES: NUMIFORM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4806809.

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Kirloskar, Sharang, Gurmeet Singh, and Avinash Kumar. "Necessity of Kinematic Strain Hardening in Simulating Impact Events." In ASME 2017 Gas Turbine India Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gtindia2017-4779.

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Impact events are very high speed and short duration events. Experimental analysis of such events tends to be extremely expensive and challenging to study because of the apparatus and measurement systems required to capture the event. Due to this, impact events are studied extensively through simulations. The ability to simulate these events is a dictating factor for developing better and more efficient designs. Traditionally, loads occurring due to impact events are assumed to monotonically increase and hence pure isotropic strain hardening is sufficient to model the material behavior. However, this assumption doesn’t hold true for all impact events. When the loads caused by an impact do not monotonically increase but instead oscillate causing tension and compression cycles, pure isotropic hardening could lead to unrealistic results. In this work, different strain hardening rules are studied and analyzed for a plate under impact loading. The process to obtain a parameter which sets a realistic combination of isotropic and kinematic strain hardening rules is demonstrated and discussed. Limitations of the existing practice of using isotropic hardening in impact loading cases are studied. An alternative approach to accommodate the kinematic hardening rule into material models using LS-DYNA, a finite element solver, is discussed.
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Fathi, A., J. J. Roger Cheng, Samer Adeeb, and Joe Zhou. "Critical Buckling Strain in High Strength Steel Pipes Using Isotropic-Kinematic Hardening." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31149.

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High strength steel pipes (HSSP) have become more popular recently for highly pressurized pipelines built to transport natural gas from remote fields to energy markets. Material tests on HSSP showed significant material anisotropy caused by the pipe making process, UOE. A combined isotropic-kinematic hardening material model is developed based on observations made on longitudinal and transverse stress strain data of HSSP. This material model combines linear isotropic hardening with Armstrong-Fredrick kinematic hardening and can be easily calibrated by longitudinal and transverse tension coupon test results. The proposed material model is used to show how considering material anisotropy affects the critical buckling strain of HSSP in the longitudinal direction. Finite element (FE) models are developed to simulate one pressurized and one unpressurised HSSP tested under monotonic displacement-controlled bending. Isotropic and anisotropic material modeling methods are used for each HSSP models. In the isotropic material model, longitudinal stress-strain data of HSSP material is used to define the stress-strain relationship. In the anisotropic model combined hardening material model, calibrated by longitudinal and transverse HSSP stress-strain data, is used. Critical buckling strain predictions by isotropic and anisotropic models of these pipes are compared with test results and also with some available criteria in standards and literatures. These comparisons show that anisotropic models give predictions closer to test results.
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Miranda Pino, L. F., Piaras A. Kelly, and Beatrice A. Baudet. "Modelling Isotropic and Kinematic Hardening of Granular Materials with a Thermodynamical Approach." In Sixth Biot Conference on Poromechanics. Reston, VA: American Society of Civil Engineers, 2017. http://dx.doi.org/10.1061/9780784480779.131.

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Mullins, Jonathan, and Jens Gunnars. "Welding Simulation: Relationship Between Welding Geometry and Determination of Hardening Model." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78599.

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It is generally acknowledged that the material hardening model exerts a considerable effect on predicted weld residual stress fields. For this reason the choice of hardening model has attracted interest among analysts, particularly during recent validation studies. Nevertheless there is still lack of evidence for a hardening model which is generally applicable for all welding geometries. In this work we examine the predictions of nonlinear kinematic, isotropic and mixed hardening models for two different geometries: a single bead on plate weld, and a multi-bead girth weld. Hardening parameters are based on the same openly available mechanical test data. Deformation histories for the two welding geometries are presented. Predicted residual stress profiles are compared with experimental measurements. It is noted that nonlinear kinematic hardening results in good predictions for the single bead welding simulation where hardening in the weld and HAZ is dominated by a single heating and cooling cycle. Isotropic hardening results in good predictions for the 42 bead girth weld, where hardening in the weld and HAZ is heavily influenced by several heating and cooling cycles from the addition of several weld beads and where some relaxation of residual stress is possible. Mixed hardening can result in good predictions for both welding geometries. Additional strategies for development of material models based on isotropic and kinematic hardening and relevant test data are discussed with particular attention paid to intermediate weld geometries.
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Nayebi, Ali, and Kourosh H. Shirazi. "Cyclic Loading of Beams Based on Kinematics Hardening Behavior Coupled With Isotropic Damage." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95239.

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The kinematic hardening theory of plasticity based on the Prager model and incremental isotropic damage is used to evaluate the cyclic loading behavior of a beam under the axial, bending, and thermal loads. This allows damage to be path-dependent. The damage and inelastic deformation are incorporated and they are used for the analysis of the beam. The beam material is assumed to follow linear strain hardening property coupled with isotropic damage. The material strain hardening curves in tension and compression are assumed to be both identical for the isotropic material. Computational aspects of rate independent model is discussed and the constitutive equation of the rate independent plasticity coupled with the damage model are decomposed into the elastic, plastic and damage parts. Return Mapping Algorithm method is used for the correction of the elastoplastic state and for the damage model the algorithm is used according to the governed damage constitutive relation. The effect of the damage phenomenon coupled with the elastoplastic kinematic hardening is studied for deformation and load control loadings.
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Zhu, Xian-Kui, and Brian N. Leis. "Elastic-Plastic Finite Element Simulation and Fatigue Life Prediction for Beam and Elbow Under Cyclic Loading." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26273.

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Work hardening and Bauschinger effects on plastic deformation and fatigue life for a beam and an elbow under cyclic loading are examined using finite element analysis (FEA). Three typical material plastic hardening models, i.e. isotropic, kinematic and combined isotropic/kinematic hardening models are adopted in the FEA calculations. Based on the FEA results of cyclic stress and strain at a critical location and using an energy-based fatigue damage parameter, the fatigue lives are predicted for the beam and elbow. The results show that (1) the three material hardening models determine similar stress at the critical location with small differences during the cyclic loading, (2) the isotropic model underestimates the cyclic plastic strain and overestimates the fatigue life, (3) the kinematic model overestimates the cyclic plastic strain and underestimates the fatigue life, and (4) the combined model predicts the intermediate cyclic plastic strain and reasonable fatigue life.
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Vladimirov, Ivaylo N., and Stefanie Reese. "A finite strain isotropic/kinematic hardening model for springback simulation of sheet metals." In 10TH ESAFORM CONFERENCE ON MATERIAL FORMING. AIP, 2007. http://dx.doi.org/10.1063/1.2729501.

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Eslami, M. R., and H. Mahbadi. "Elastic-Plastic-Creep Cyclic Loading of Structures." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93079.

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In this article, cyclic loading results of structures, such as cylindrical and spherical vessels are investigated. The structure’s material is assumed to be isotropic and homogeneous and obey a nonlinear strain hardening law in the plastic range. Two general plasticity theories, namely the isotropic and kinematic hardening theories with the von Mises associated flow rules are used to evaluate the cyclic results of these structures under various types of mechanical and thermal loads. Prager and Armstrong-Frederick kinematic hardening models are used to simulate the transformation of the yield surface in the stress space, due to imposed loads. A new iterative method is proposed and used to analyze the structural behavior under cyclic loading conditions. The results are verified with the known data given in the literature.
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Jung, Hyun-Woo, Yun-Jae Kim, Yukio Takahashi, Kamran Nikbin, Catrin M. Davies, and Robert A. Ainsworth. "The Effect of Cyclic Hardening Model on Deformation Behavior of Cracked Body Under Creep-Fatigue Loading Condition." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21356.

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Abstract In this study, to determine appropriate cyclic hardening model for simulating creep-fatigue crack growth, sensitivity of hardening model on global/local deformation behavior during creep-fatigue crack growth is studied using finite element (FE) debonding analysis method. Three hardening models derived from tensile stress-strain curve to treat large strain near crack are considered in this study: isotropic hardening model, kinematic hardening model and combined hardening model. Simulation results indicate that cyclic hardening model does not make large difference in global deformation behavior but make difference in local deformation behavior. The effect of hardening model on inelastic strain and stress near crack are discussed in detail.
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