Relevant bibliographies by topics / Elasto-viscoplastic behavior

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

Academic literature on the topic 'Elasto-viscoplastic behavior'

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Published: 6 April 2023

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Journal articles on the topic "Elasto-viscoplastic behavior"

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Goto, Keita, Takuya Tomioka, Masahiro Arai, and Tetsuya Matsuda. "Elasto-Viscoplastic Analysis of Slanting-Weft Woven Fabric Composites Based on Homogenization Theory." Key Engineering Materials 725 (December 2016): 410–15. http://dx.doi.org/10.4028/www.scientific.net/kem.725.410.

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The elasto-viscoplastic behavior of slanting-weft woven laminates, the fiber bundles of which are not crossed at a right angle, is investigated both macroscopically and microscopically. For this, an analysis model for the [±θ] slanting-weft woven laminate with a cross angle ±θ and its diamond-shaped unit cell are considered. Then, a basic cell, which is quarter of the unit cell, is defined as an analysis domain by considering the point-symmetry of the internal structure. For the basic cell, the homogenization theory for nonlinear time-dependent composites with point-symmetric internal structures is applied. Using the present method, the elasto-viscoplastic analysis of the [±θ] slanting-weft woven laminates subjected to an in-plane uniaxial tensile load is performed. From the analysis results, the macroscopic elasto-viscoplastic behavior and the microscopic stress and strain distributions of the laminates are investigated.
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Chenot, J. L., and M. Bellet. "A Velocity Approach to Elasto-Plastic and Elasto-Viscoplastic Calculation by the Finite Element Method." Journal of Engineering for Industry 112, no. 2 (1990): 150–54. http://dx.doi.org/10.1115/1.2899558.

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A second order scheme for the time discretization of the elasto-plastic or elasto-viscoplastic behavior is proposed, based on a velocity approach. The complete set of equations is given for the evolution problem in the case of small rotations approximation. The method is quite general and may be applied to a large class of constitutive equations. The finite element discretization is briefly outlined and it is shown that the procedure is quite similar to that of previous displacement formulations. A numerical example concerning the sheet metal forming process, with an elasto-viscoplastic behavior and a membrane approximation, is presented. The numerical tests show a considerable improvement in accuracy for a given increment of time.
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Saleem, Muhammad. "Microplane modeling of the elasto-viscoplastic constitution." Journal of Research in Science, Engineering and Technology 8, no. 3 (2020): 19–25. http://dx.doi.org/10.24200/jrset.vol8iss3pp19-25.

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In this paper, the elasto-viscoplastic Constitutive model is applied within the Microplane framework. The use of strain-dependent models allows measuring the effect of loading speed on the soil. Additionally, rate-based behavior models in simulation modeling avoid the uniqueness of the ruling equation. The proposed model can plot the stress-strain history on plates with different angles inside the soil. Therefore, valuable information can be obtained about the failure plane. Using the Microplane framework enables this hybrid behavior model to predict local strain.
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Wang, Jing Yin, and Fang Liu. "Thermodynamic Properties of Soft Sedimentary Rock in Geotechnical Engineering." Applied Mechanics and Materials 170-173 (May 2012): 687–91. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.687.

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In geotechnical engineering such as supporting of deep and soft rock roadway ,oil drilling , and construction of military underground defensive facility, thermodynamic properties of soft sedimentary rock has guiding significances .The study of the thermal constitutive behavior of rock under temperature has been done for many years, and many achievement have been got on this issue. In this paper, some experimental researches on the thermo-mechanical characteristics of soft sedimentary rock have been presented. Some test results have been simulated with a thermo-elasto-viscoplastic model. The results show that the proposed thermo-elasto-viscoplastic model reflects the visco-elastoplastic properties of rock，and can describe the thermo-mechanical behaviors of soft shale rocks in not only drained conventional triaxial compression tests but also drained triaxial creep tests. So it can be used for analysis of theology and stability of rock engineering.
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Bettaieb, Mohamed Ben, Thibaut Van Hoof, Thomas Pardoen, et al. "On the elasto-viscoplastic behavior of the Ti5553 alloy." Materials Science and Engineering: A 617 (November 2014): 97–109. http://dx.doi.org/10.1016/j.msea.2014.08.055.

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Zeng, Tao, Jian-Fu Shao, and Wei-Ya Xu. "Micromechanical modeling of the elasto-viscoplastic behavior of granite." Comptes Rendus Mécanique 343, no. 2 (2015): 121–32. http://dx.doi.org/10.1016/j.crme.2014.11.005.

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Adachi, T., F. Oka, and H. B. Poorooshasb. "A Constitutive Model for Frozen Sand." Journal of Energy Resources Technology 112, no. 3 (1990): 208–12. http://dx.doi.org/10.1115/1.2905759.

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An elasto-viscoplastic constitutive model for frozen sand is proposed based on the elasto-viscoplasticity theory incorporating the new time measure. The proposed model can describe a number of features of the mechanical behavior of the medium, such as rate sensitivity and strain softening under the triaxial compression test loading conditions. The effects of temperature, ambient pressure and the concentration of soil particles are also discussed.
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de Angelis, Fabio. "Computational Aspects in the Elasto/Viscoplastic Material Behavior of Solids." Advanced Materials Research 567 (September 2012): 192–99. http://dx.doi.org/10.4028/www.scientific.net/amr.567.192.

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In the present paper a computational algorithmic procedure is presented for modeling the elasto/viscoplastic behavior of solid materials. The effects of different loading programs on the inelastic behavior of rate-sensitive materials are analyzed with specific numerical examples. An appropriate solution scheme and a consistent tangent operator are applied which are capable to be adopted for general computational procedures. Numerical computations and results are reported which illustrate the rate-dependence of the constitutive model in use.
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Tai, Nguyen Huynh Tan. "CALCULATION OF PAVEMENT PERMANENT DEFORMATION USING PERZYNA’S ELASTO-VISCOPLASTIC MODEL." Vietnam Journal of Science and Technology 54, no. 1 (2016): 150. http://dx.doi.org/10.15625/0866-708x/54/1/5565.

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In this work, a method for calculation of pavement permanent deformation due to traffic loading is presented. The mechanics behavior of asphalt concrete layer is considered as Perzyna’s elasto-viscoplastic material. The pavement permanent deformation is incrementally calculated using nonlinear finite element method. Model parameters are determined using Hamburg Wheel Tracking Test result.
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Koo, Gyeong-Hoi, and Ji-Hyun Yoon. "Inelastic Material Models of Type 316H for Elevated Temperature Design of Advanced High Temperature Reactors." Energies 13, no. 17 (2020): 4548. http://dx.doi.org/10.3390/en13174548.

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In this paper, the inelastic material models for Type 316H stainless steel, which is one of the principal candidate materials for elevated temperature design of the advanced high temperature reactors (HTRs) pressure retained components, are investigated and the required material parameters are identified to be used for both elasto-plastic models and unified viscoplastic models. In the constitutive equations of the inelastic material models, the kinematic hardening behavior is expressed with the Chaboche model with three backstresses, and the isotropic hardening behavior is expressed by the Voce model. The required number of material parameters is minimized to be ten in total. For the unified viscoplastic model, which can express both the time-independent plastic behavior and the time-dependent viscous behavior, the constitutive equations have the same kinematic and isotropic hardening parameters of the elasto-plastic material model with two additional viscous parameters. To identify the material parameters required for these constitutive equations, various uniaxial tests were carried out at isothermal conditions at room temperature and an elevated temperature range of 425–650 °C. The identified inelastic material parameters were validated through the comparison between tests and calculations.
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Dissertations / Theses on the topic "Elasto-viscoplastic behavior"

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Yuan, Yixing Ph D. Massachusetts Institute of Technology. "A new elasto-viscoplastic model for rate-dependent behavior of clays." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104330.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Viscous properties of clay pertain to numerous geotechnical problems, such as excessive settlements associated with constructed fills on marine clays, or rate-dependent cyclic response of offshore foundations under wave loading. Although there are many observations on rate-dependent characteristics of clays in laboratory tests, none of the existing soil models has attained consistent descriptions of the observed strain-rate effects in shearing, or creep and relaxation in compression. This thesis develops a novel elasto-viscoplastic soil model, MIT-SR, to address these limitations. The proposed I-D formulation introduces a physically-based evolution law that attributes the macroscopic viscoplastic strain rate to an internal strain rate associated with the prior strain rate history. By varying the rate-sensitivity parameter the proposed model provides a unified framework that can describe a wide range of observed time-effects in I -D compression behavior, and resolves a long-standing dilemma regarding the coupling of creep and long-term consolidation ('Hypothesis A vs B' controversy). The framework has been further enhanced to allow the predictions of volumetric hysteretic behavior as well as the reduction of creep properties after I -D swelling. The MIT-SR soil model features a 3-D surface system, generalized hysteretic formulation and physical-based viscoplastic flow rules, which are grafted together with the framework of the prior MIT-SI elastoplastic soil model. The MIT-SR model adds 5 parameters to the prior formulation in order to represent rate-dependent soil properties. These parameters can be evaluated from a set of defined test procedures in standard laboratory devices. The proposed model has been calibrated for Resedimented Boston Blue Clay. Comparisons of predictions with experimental data have shown that the proposed model can accurately predict anisotropic stress-strain-strength properties and rate-dependent characteristics for a range of undrained shear tests. MIT-SR is the fourth generation of effective-stress soil models developed at MIT. It greatly expands the predictive capabilities of its predecessors and overcomes the limitations of existing rate-dependent soil models in the literature. The proposed model has many potential applications in geotechnical analyses, particularly in problems that involve considerable strain rate effects (e.g., pile penetrations in clays) or long-term ground movements (e.g., embankments founded on soft clays).<br>by Yixing Yuan.<br>Ph. D.
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Karim, Md Rezaul. "Simulation of long-term consolidation behavior of soft sensitive clay using an elasto-viscoplastic constitutive model." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/136140.

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Rovinelli, Andrea. "Influence of microstructure variability on short crack growth behavior." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5794/.

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Fatigue life in metals is predicted utilizing regression analysis of large sets of experimental data, thus representing the material’s macroscopic response. Furthermore, a high variability in the short crack growth (SCG) rate has been observed in polycrystalline materials, in which the evolution and distributionof local plasticity is strongly influenced by the microstructure features. The present work serves to (a) identify the relationship between the crack driving force based on the local microstructure in the proximity of the crack-tip and (b) defines the correlation between scatter observed in the SCG rates to variability in the microstructure. A crystal plasticity model based on the fast Fourier transform formulation of the elasto-viscoplastic problem (CP-EVP-FFT) is used, since the ability to account for the both elastic and plastic regime is critical in fatigue. Fatigue is governed by slip irreversibility, resulting in crack growth, which starts to occur during local elasto-plastic transition. To investigate the effects of microstructure variability on the SCG rate, sets of different microstructure realizations are constructed, in which cracks of different length are introduced to mimic quasi-static SCG in engineering alloys. From these results, the behavior of the characteristic variables of different length scale are analyzed: (i) Von Mises stress fields (ii) resolved shear stress/strain in the pertinent slip systems, and (iii) slip accumulation/irreversibilities. Through fatigue indicator parameters (FIP), scatter within the SCG rates is related to variability in the microstructural features; the results demonstrate that this relationship between microstructure variability and uncertainty in fatigue behavior is critical for accurate fatigue life prediction.
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Heudt, Auréliane. "Etude de la fissuration en plasticité généralisée." Electronic Thesis or Diss., Paris, ENMP, 2013. https://pastel.archives-ouvertes.fr/tel-04058921.

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L'objectif de cette étude est de modéliser la croissance de fissures pour des structures minces sollicitées en conditions cycliques anisothermes conduisant à une plasticité étendue. La méthodologie a été mise au point sur des éprouvettes permettant des sollicitations uni-axiales de traction compression pour simuler les conditions de chargement sur structures. Les géométries d'éprouvettes retenues permettant d'éviter le flambement ont donc été usinées dans des barres, de microstructure proche de celle des composants. Dans un premier temps, il a été nécessaire de déterminer le comportement cyclique du superalliage à base de nickel Haynes 230 dans une large gamme de températures, de l'ambiante à 900°C, et de vitesses de déformation. Un modèle de comportement élasto-visco-plastique unifié, à écrouissage cinématique non linéaire, a été identifié en utilisant un potentiel de type Sellars-Teggart, afin de décrire l'effet de vitesse de déformation. Ce modèle permet de décrire de façon raisonnable le comportement en fatigue anisotherme. Des essais de propagation en plasticité généralisée ont été conduits sur éprouvettes de type SEN en déformation imposée, en traction compression uni-axiale, à 900°C. Les essais ont été faits soit en contrôlant le déplacement sur le ligament restant, du côté opposé à l'entaille, soit en contrôlant le déplacement du côté de l'entaille, c'est-à-dire l'ouverture de la fissure. Les essais conduisent ainsi à une augmentation de la vitesse ou à une diminution de celle-ci selon le mode de pilotage. Des essais à haute fréquence en contrôle de charge ont également été conduits en plasticité confinée. Un modèle macroscopique a été proposé pour décrire la vitesse de fissuration en fonction des conditions macroscopiques imposées à l'éprouvette, ou en fonction des conditions locales selon la longueur de fissure. Ce modèle a également été testé sous forme de post-processeur de calculs par éléments finis. Une démarche d’identification en calcul de structure a été proposée et validée pour différents cas de chargement incluant propagation de la fissure et chargement biaxial<br>This study aims to model fatigue crack propagation in a study case simulating an aerospace engine component. The considered material is the nickel-based alloy Haynes 230. Operating conditionsinclude a wide range of temperature, strong thermal gradient and high mechanical cycling frequency. The subsequent strong strain gradient yields to crack propagation under gross plasticity conditions. The temperature conditions induce high amount of viscosity. Thus, a visco-plastic kinematic and isotropic hardening model was chosen and identified through isothermal tests conducted in the range of 25°C to 900°C. The strain rate sensitivity was modelled using a Sellars-Tegart flow rules. The chosen model was satisfying in describing anisothermal fatigue tests. Strain controlled crack tests were conducted on Single Edge Notched (SEN) specimen at 900°C. Tests were performed using a wide frequency range (from 10-2 Hz up to 25Hz), with several loading ratios. Two tests configurations were analysed. Firstly, the strain was applied in front of the notch, in order to keep the crack opening displacement (CTOD) constant. This testconfiguration leads to crack initiation under large scale yielding condition and a decrease of the effective load leads to small scale yielding when cracks are long. For the second configuration, the strain was applied at the opposite of the notch leading to large scale yielding from initiation to final failure. The relevance of crack growth models is tested on this experimental database. The chosen model is based on the partition of the energy into plastic distortion energy and elastic opening energy, in order to describe separately elasticity and plasticity contributions. This fatigue crack growth model was succesfully identified at a macroscopic scale - the length scale of the specimen. Finally, the same model was identified for post-processing computation and validated on experimental fatigue crack growth data. This last step was perfomed for explicit crack growth modelling and biaxial crack growth results
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Do, Duc Phi. "Application des approches d'homogénéisation à l'étude des propriétés thermo-hydro-mécaniques des roches. Application aux argilites." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL091N/document.

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Le présent travail est consacré à l'étude du comportement thermo-hydro-mécanique linéaire et non linéaire des roches poreuses de type argilites par approche de changement d'échelle. A partir des observations microstructurales de ces matériaux, un modèle conceptuel a été proposé. Dans ce modèle, le volume élémentaire représentatif du milieu hétérogène est composé d'une phase matricielle argileuse contenant des inclusions sphériques de minéraux de quartz et de calcite et des inclusions ellipsoïdales aplaties représentant l'espace poreux. Dans un premier temps, le procédé de la modélisation a été exploité par la détermination des propriétés effectives isotropes et isotrope transverses des argilites : la conductivité thermique et les propriétés thermo-hydro-mécanique croisées. En outre, de nombreuses études numériques ont mis en évidence l'influence de la morphologie de l'espace poreux, de la minéralogie et des schémas d'estimation sur les résultats prédictifs. Dans un deuxième temps, nous avons modélisé le comportement mécanique non linéaire (élasto-plastique, élasto-viscoplastique) des roches argileuses. La comparaison entre les simulations numériques et les résultats expérimentaux disponibles (essai de compression triaxiale, essai de fluage) a confirmé la validation du modèle développé<br>The present work deals with the linear and non-linear thermo-hydro-mechanical behaviour of porous rocks such as the argillite by the multiscale modelling approach. Based on microstructure observations, a conceptual model was proposed. In this model, the representative elementary volume of a heterogeneous medium is composed of an argillaceous matrix containing spherical inclusions of minerals quartz and calcite and ellipsoidal inclusions representing the pore space. In a first step, the process of modelling has been exploited by determining the isotropic and transversely isotropic effective properties of the argillite: thermal conductivity and thermo-hydro-mechanical properties. Furthermore, many numerical studies have highlighted the influence of the morphology of the pore space, of the mineralogy and of the estimate schemes to the predictive results. In a second step, we modelled the non linear mechanical behaviour (elasto-plastic, elasto-viscoplastic) of argillaceous rocks. The comparison between numerical simulations and available experimental results (triaxial compression test, creep test) confirmed the validation of the model developed
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Manivannan, Ganeshalingam Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Viscoplastic modelling of embankments on soft soils." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2005. http://handle.unsw.edu.au/1959.4/38743.

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A major instrumented geosynthetic reinforced approach embankment was constructed to 5.5 m elevation above ground, with prefabricated vertical drains, over a soft compressible clay deposit at Leneghan, Newcastle, Australia in May 1995. The field monitoring of settlements for over six years shows that the embankment manifests significant creep. The instrumentation, field performance and the finite element analyses for predicting the long-term performance of this embankment are described in this thesis. The maximum settlement of 1.1 m was observed one year after the completion of construction. However, the embankment continued to settle at a rate of 0.4 mm/day for the next 5 years. The horizontal displacements of 0.09-0.14 m at various locations and the maximum reinforcement strains of 0.67% were recorded. A numerical model was developed to perform a fully coupled large deformation elasto-viscoplastic finite element analysis for this performance prediction based on creep model proposed by Kutter and Sathialingam (1992). The foundation soil was modelled with creep material behaviour using six noded linear strain triangular elements. A well-documented case history ??? Sackville embankment, New Brunswick, Canada was analysed using this model as a benchmark problem and the model was found to predict all the behaviour characteristics reasonably well. The results obtained from finite element analysis using this model are shown to be in reasonable agreement with the observed performance of Leneghans embankment in terms of settlements, horizontal displacements, excess pore pressures and geosynthetic strains. But, the prediction of settlements was less than satisfactory beyond April 1999. Finite element analyses were performed to study the sensitivity of this embankment behaviour on the variation of hydraulic conductivity values and geosynthetic reinforcement properties. This sensitivity study indicated that the kv variation, the kh/kv ratio and the nominal values of geosynthetic properties adopted in the benchmark analysis are reasonable enough for the long-term behaviour prediction.
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Chin, Chi-Kung, and 秦繼孔. "A study of the elasto-viscoplastic behavior of the Taipei silty clay." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/53yyx7.

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博士<br>國立臺灣科技大學<br>營建工程系<br>100<br>The objective of this study was to derive an anisotropic viscoplastic rate dependent constitutive model. The model was derived on the basis of the viscoplastic theory proposed by Kutter and Sathialingam and the yield surface function adopted by Wheeler et al. In this paper suggests a regular method to figure the viscoplastic strain to avoid Kutter and Sathialingam theory retricting the p is constant. In this paper, explain the mechanics characteristics of the Taipei silty clay, and introduce more famous or used most often plastic and visco-plastic soil model. The adopted yield surface function was more consistent with the yield surface of the natural clay in the world and Taipei silty clay, compared with the existing constitutive models.The model’s softening rule is derived by Wheeler et al. and the parameters are to rebuild which were studing by K0-consolidated undrained compression and extension tests. After rebuilding parameters, the model confirmed able to simulate the undrained stress strain response for the tests aforementioned. By parameters study, check the parameters sensitive to undrained strength. The model was also used to simulate the isotropic consolidated and K0-consolidated undrained creep test. Results show that the predicted strain from the proposed model was close to the test data. Especially the model is able to predict the tertiary creep failure when the soil is subject to high stress level. Finally, analysis the TNEC deep excavation case and was verified by the field data. To make sure the model has the time dependent ability.
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TAECHAKUMTHORN, CHALERMPOL. "EFFECTS OF REINFORCEMENT AND SOIL VISCOSITY ON THE BEHAVIOUR OF EMBANKMENTS OVER SOFT SOIL." Thesis, 2011. http://hdl.handle.net/1974/6280.

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A verified elasto-viscoplastic finite element model is used to develop a better understanding of the performance of embankments with geosynthetic reinforcement constructed over rate-sensitive soil. The interaction between reinforcement and prefabricated vertical drains (PVDs) and their effects on time-dependent behaviour of embankments are examined. For rate-sensitive soils, the generation of creep-induced pore pressures following the end of construction is evident along the potential slip surface. As a result, the minimum factor of safety with respect to embankment stability occurs after the end of construction. The combined use of reinforcement and PVDs are shown to provide an effective means of minimizing creep-induced excess pore pressure, increasing overall stability, and decreasing deformation of the embankments. The combined effects of the viscoelastic properties of geosynthetic reinforcement (polyester, polypropylene and polyethylene) and the rate-sensitive nature of foundation soils on the performance of embankments are examined. The effect of various factors, including reinforcement type (i.e., stiffness and viscosity), soil viscosity, construction rate and allowable long-term reinforcement strain, on the time-dependent behaviour of embankments are considered. The long-term performance of reinforced embankments is investigated for different maximum allowable long-term reinforcement strains. From a series of finite element analyses, the ideal allowable reinforcement strains to minimize embankment deformation while providing optimum long-term service height of the embankment, considering the effect of soil and reinforcement viscosity, are proposed for soils similar to those examined in this study. The currently proposed design methods for embankments with creep-susceptible reinforcement over rate-sensitive soils appear to be overly conservative. This study proposes a refined approach for establishing the allowable long-term reinforcement strains that are expected to provide adequate performance while reducing the level of conservativeness of reinforced embankment design. Finally, a previously developed elasto-viscoplastic constitutive model is modified to incorporate the effect of soil structure using a state-dependent fluidity parameter and damage law. The model was evaluated against data from a well-documented case study of a reinforced test embankment constructed on a sensitive Champlain clay deposit in Saint Alban, Quebec. The benefit of basal reinforcement and the effect of reinforcement viscosity are then discussed for these types of soil deposits.<br>Thesis (Ph.D, Civil Engineering) -- Queen's University, 2011-01-21 22:26:40.133
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Book chapters on the topic "Elasto-viscoplastic behavior"

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Tomita, Yoshihiro, and Kenichi Hayashi. "Deformation Behavior in Elasto-Viscoplastic Polymeric Bars under Tension." In Anisotropy and Localization of Plastic Deformation. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3644-0_122.

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Ecker, Werner, Thomas Antretter, and R. Ebner. "Calibration and Validation of an Elasto-Viscoplastic Material Model for a Hot Work Tool Steel Used in Pressure Casting Dies." In The Mechanical Behavior of Materials X. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-440-5.685.

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Tomita, Y., and A. Shindo. "Strain Localization Behavior of Thermo Elasto-Viscoplastic Blocks Under Plane Strain Tension." In Advances in Plasticity 1989. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-040182-9.50117-x.

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Matsui, T., K. Tokida, and K. Oda. "Long-term consolidation behavior of Pleistocene clays in Osaka Bay and applicability of elasto-viscoplastic one-dimensional consolidation model." In Frontiers in Offshore Geotechnics. Taylor & Francis, 2005. http://dx.doi.org/10.1201/noe0415390637.ch131.

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Zambelli, C., C. di Prisco, and S. Imposimato. "A cyclic elasto-viscoplastic constitutive model." In Cyclic Behaviour of Soils and Liquefaction Phenomena. Taylor & Francis, 2004. http://dx.doi.org/10.1201/9781439833452.ch12.

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TOMITA, YOSHIHIRO, and TETSUYA NAKAO. "FLOW LOCALIZATION OF ELASTO-VISCOPLASTIC TENSION BLOCKS." In Mechanical Behaviour of Materials VI. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-037890-9.50039-9.

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Conference papers on the topic "Elasto-viscoplastic behavior"

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João Marciano Laredo dos Reis, Heraldo Silva da Costa Matto, and EDUARDO PEREIRA MOTTA. "ELASTO-VISCOPLASTIC BEHAVIOR OF A POLYVINYLIDENE FLUORIDE (PVDF) IN TENSION." In 23rd ABCM International Congress of Mechanical Engineering. ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-1761.

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Zhang, Feng, Atsushi Yashima, Guan Lin Ye, Hla Aung, Kiyokazu Naitou, and Teruo Nakai. "Elasto-Viscoplastic Behavior of Soft Sedimentary Rock, Tests and Its Modeling." In Second Japan-U.S. Workshop on Testing, Modeling, and Simulation in Geomechanics. American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40870(216)12.

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Atmani, O., B. Abbès, F. Abbès, Y. M. Li, and S. Batkam. "Identification of a thermo-elasto-viscoplastic behavior law for the simulation of thermoforming of high impact polystyrene." In PROCEEDINGS OF THE 21ST INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2018. Author(s), 2018. http://dx.doi.org/10.1063/1.5034971.

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Lee, Chi-Seung, Myung-Sung Kim, Kwang-Ho Choi, Myung-Hyun Kim, and Jae-Myung Lee. "Numerical Prediction Method for Elasto-Viscoplastic Behavior of Glass Fiber Reinforced Polyurethane Foam Under Various Compressive Loads and Cryogenic Temperatures." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-42360.

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In the present study, the material characteristics of a glass fiber-reinforced polyurethane foam (RPUF) which is widely adopted to a liquefied natural gas (LNG) insulation system was investigated by a series of compressive tests under room and cryogenic temperatures. In addition, a temperature- and strain rate-dependent constitutive model was proposed to describe the material nonlinear behavior such as increase of yield stress and plateau according to temperature and strain rate variations. The elasto-viscoplastic model was transformed to an implicit form, and was implemented into the ABAQUS user-defined subroutine, namely, UMAT. Through a number of simulation using the developed subroutine, the various stress-strain relationships of RPUF were numerically predicted, and the material parameters associated with the constitutive model were identified. In order to validate the proposed method, the computational results were compared to a series of test of RPUF.
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5

Emori, Kanako, Tatsuma Miura, and Akio Yonezu. "Large Deformation Behavior of Porous Polymer Materials With 3D Random Pore Structure: Experimental Investigation and FEM Modeling." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11143.

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Abstract This study investigates the deformation behavior of porous polymer materials with 3D random pore structure. The test sample has sub-micron-sized pores with an open cellular structure, which plays a critical role for water purification. The base polymer is PVDF (polyvinylidene difluoride). First, the surface and cross section of the sample are observed using FESEM to investigate the microstructure (cell size and geometry of the cell ligament, etc). Next, uni-axial tensile loading is carried out for polymeric membrane and it is found that the membranes underwent elasto-plastic deformation. In order to establish a numerical model, finite element metod (FEM) is employed. Using a software of Surface Evolver, 3D random pore structure is created in the representative volume element (RVE). The established computational model can predict both elastic deformation and plastic deformation. Furthermore, viscoplastic deformation behavior (i.e. time-dependent deformation and creep deformation) is investigated, experimentally and numerically. In particular, creep compliance is measured, and we investigate the effect of applied loading on creep deformation behavior. Using the time–temperature–stress superposition principle (TTSSP), we obtain a new master curve, which covers higher stress level, and successfully establish an FEM model of creep deformation of the test sample. The present model enables the prediction of the macroscopic and microscopic deformation behavior of the porous materials, by taking into account of 3D random pore structure.
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Ohno, Shintaro, Seiji Morikawa, and Morihiro Mihara. "The Rock Creep Evaluation in the Analysis System for the Long-Term Behavior of TRU Waste Disposal System." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16110.

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MACBECE (Mechanical Analysis system considering Chemical transitions of BEntonite-based and CEment-based materials) is an analysis system to evaluate the long term mechanical behavior in the TRU (TRans Uranium) waste disposal system. TRU wastes are low level radioactive wastes that include long-lived nuclides. MACBECE is the system to calculate mechanical and chemical behavior in the near field including engineered barriers in the TRU waste disposal system, and subsequently to evaluate the hydraulic property in various components. MACBECE can evaluate the mechanical/ hydraulic alterations of two types of barrier materials, cement-based and bentonite-based materials. These materials, in the long-term, may be altered internally by chemical reaction. To evaluate the long-term mechanical behavior due to the chemical transitions, the nonlinear elastic model for the cement-based materials and the elasto-viscoplastic model for the bentonite-based materials were applied, based on the data from various laboratory tests. Also, proposed models based on the data from permeability tests were applied to evaluate the alteration of hydraulic conductivity. So as to realize the high reliable evaluation, the variable-compliance-type constitutive model proposed by Okubo (1992) was newly adopted for the rock creep evaluation in MACBECE. This creep model can express analytically nonlinear visco-elastic behavior and the over-peak-strength state behavior. This paper focuses on the adoptability of rock creep model in MACBECE. Applicability of the rock creep model is verified by conducting the numerical simulations with the long-term mechanical interaction between the TRU waste disposal system and the host rock.
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7

Tetambe, Ravi P., and Sunil S. Saigal. "Error Estimation in Nonlinear Finite Element Analysis in Two and Three Dimensions." In ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium collocated with the ASME 1995 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/cie1995-0744.

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Abstract This paper presents a comparative study of a series of flux projection type error estimators for elasto-plastic and viscoplastic materials undergoing large strains and large rotations. The error estimators are: L2 norms of stress error, total strain error, equivalent strain error, incremental total strain error per load step, and energy rate norm error, respectively. Numerical examples are presented in both two and three dimensions. The information provided by these error estimators may be used for adaptive mesh refinement and for subsequent data transfer (rezoning) in a large deformation analysis. The error estimators based on the energy rate and the incremental total strain were found to be consistently accurate in the prediction of the discretization error for the two dimensional test cases considered. The L2 norm of incremental strain error estimator consistently gave the most conservative estimate of error in two dimensions. The overall behavior of these error estimators in three dimensions was acceptable, although, not as intuitive as it was in two dimensions.
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Lasne, Patrice, Philippe Bristiel, and Nicolas Poulain. "Numerical Simulation of Full Carburizing Process of an Automotive Gear." In HT2021. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.ht2021exabp0071.

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Abstract The objective of the paper is to present material and numerical models needed to simulate with accuracy the full carburizing process of an automotive gear. The rough dimensions of the gear studied are 120mm in diameter and 45mm in height. From a numerical standpoint, as the carburizing affects only a thin layer under the surface, the mesh discretization must be adapted. Consequently, anisotropic mesh is used to describe accurately this zone. The temporal discretization must be also adapted to follow carbon diffusion and thermal evolution. The material models represent metallurgical phenomena during the complete carburizing process. The initial heating of the part induces phases transformation due to austenization. Subsequently, while holding at carburizing temperature, boundary conditions are applied to diffuse carbon into the part. While carbon content increases next to the surface, austenitic metallurgical grain growth is also modelled. A final cooling sets the properties of the carburized part. The model takes into account the phase changes using phase transformation diagrams locally adapted to chemical compositions and grain sizes. Simulation is used to predict the in-use properties of the gear at the end of the carburizing process as well as important results such as assessment of distortion and residual stresses. Thermal stresses, volume variation due to phase changes, and transformation plasticity all contribute to establish the final mechanical properties of the part. During the complete process, the material is modelled with an elasto-viscoplastic behavior and mixing methods are used to consider the relative contribution of each phase.
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Jiang, M., C. Woyeya, and J. Liu. "Investigating the Creep Behaviour of Marine Soft Structured Clay by FEM with an Elasto-viscoplastic Constitutive Model." In 16th edition of the International Conference on Computational Plasticity. CIMNE, 2021. http://dx.doi.org/10.23967/complas.2021.041.

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CALLEWAERT, DIETER, JAN BELIS, DIDIER DELINCÉ, DELPHINE SONCK, and RUDY VAN IMPE. "TORSIONAL STIFFNESS OF LAMINATED GLASS ELEMENTS IN STRUCTURAL APPLICATIONS — INFLUENCE OF A ELASTO-VISCOPLASTIC IONOMER INTERLAYER ON THE PRE-BREAKAGE BEHAVIOUR." In Proceedings of the 10th Asia-Pacific Conference. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814324052_0015.

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