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A modified constitutive model for FRP confined

OpenSees is a well-recognized open source platform with high compatibility, and it has a well-developed fiber element method to cope with nonlinear structural analysis. Fiber reinforced polymer (FRP) confined concrete can effectively improve the seismic performance of concrete structures. However, sophisticated constitutive models for FRP confined concrete are not available in the current ...

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A general constitutive model for dense, fine-particle

Previous constitutive studies of these mixtures have focused on particular cases, typically limited to 2D, steady, simple shearing flows. In this work, we introduce a predictive and general, 3D continuum model for this material, using mixture theory to couple the

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Constitutive Model for Rocks Journal of Geotechnical

A constitutive model based on the theory of plasticity is proposed and used to characterize stressdeformation behavior of rocks. It allows for factors such as hardening, volume changes, stress paths, cohesive and tensile strengths, and variation of yield behavior with ...

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NorSand in RS2: Advanced Constitutive Material Model

NorSand in RS2: An Advanced Constitutive Material Model for Modeling and Predicting Static Liquefaction Rocscience is excited to announce the addition of NorSand to RS2's already impressive arsenal of constitutive models. The addition is the first practical ...

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A constitutive model with microstructure evolution for

A constitutive model is developed for the complex rheology of rate-independent granular materials. The closures for the pressure and the macroscopic friction coefficient are linked to microstructure through evolution equations for coordination number and fabric.

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Critical state soil constitutive model for methane

This paper presents a new constitutive model that simulates the mechanical behavior of methane hydratebearing soil based on the concept of critical state soil mechanics, referred to as the Methan... [14] Soil straining may deteriorate the bonds and the degree of interlocking, which in turn reduces its contribution to the enhancement of stiffness and strength.

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Creep Constitutive Model for Frozen Soils Based on

The binary medium creep model for frozen soils is formulated based on the homogenization theory by defining the creep constitutive model of the bonded elements, the creep constitutive model of the ...

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A multiaxial constitutive model for fibre-reinforced sand

While constitutive models that are able to capture such anisotropic behaviour of FRS have been proposed for conventional triaxial compression and extension conditions only, this paper proposes for the first time a full anisotropic model for FRS formulated in the

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A constitutive model of the solid propellants

A more accurate constitutive model can predict the response under complex loading conditions, and the physical based damage parameter facilitates us to evaluate the robustness of complex structures. In this study, we developed a continuum theory to model

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A hypoplastic constitutive model for debris materials

A new constitutive model for debris materials Based on the above analysis, the hypoplastic model ( 21 ) and the tensor form of the modified Bagnolds model are employed as the static and dynamic portions of the new constitutive model, respectively.

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Determination of Material Constitutive Laws for Inconel

Consequently, the appropriate constitutive model was limited to the temperature range of T = 400-700 C in order to increase the prediction accuracy. As a result, the mathematical function of the J-C constitutive material model suitable for low and high strainT14

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A constitutive model for granular soils Request PDF

A simple constitutive model is presented to describe the mechanical behaviors of granular soils in a large stress range. A novel normal compression line (NCL) is first expressed by ...

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Constitutive Model for Rubberized Concrete Passively

Based on the results, this study develops a new analysis-oriented model that predicts accurately the behavior of such concrete. This article contributes toward developing advanced constitutive models for analysis/design of sustainable high-value FRP CRuC

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On statistical damage constitutive model and its

Based on the characteristics that the failure of rock micro-unit accorded with normal distribution, this paper developed a statistical damage constitutive model reflecting the full process of rock failure by using the stress-strain curve of rock and introducing into the ...

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A Constitutive Model for Fiber-reinforced Polymer

A constitutive model for fibrous polymer composites was established based on an elasticplastic approach. The proposed potential function is a linear combination of functions related to deviatoric and dilatational deformations. A unidirectional carbon/epoxy ...

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The Constitutive Model for Isotropic Damage of

A constitutive model for isotropic damage of geomaterial is put forward, and its numerical computation procedure is given also. The calculated results for a simple example could highlight our understanding about the mechanism of geomaterial damage, and several ...

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Study of modified statistical damage softening

The increase amplitude of residual strength of rock is larger than the rock peak intensity of rock with the increase of confining pressure.Gradually,residual strength becomes the main factor of complete stress-strain curve of rock at the stage after peak intensity.While ...

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A thermomechanical constitutive model for unsaturated

A thermomechanical constitutive model for unsaturated clays is presented in this paper based on an existing model for saturated clays originally proposed by the authors. The saturated clay model was formulated in the framework of critical state soil mechanics and ...

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A constitutive model for structured soils Géotechnique

The paper proposes a constitutive model for structured soils (MSS) which describes the engineering effects of structure development and degradation, such as: high intact stiffness and strength, appreciable reduction of stiffness and strength due to de-structuring ...

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Constitutive model for metals with dynamic strain aging -

In this paper, a modified constitutive relation to model the dynamic strain aging phenomenon is proposed based on the previous model of Voyiadjis-Abed. The dynamic strain aging phenomenon is typically observed in metals for a certain range of strain rates and ...

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HKU Scholars Hub: A constitutive model for structured

A simple constitutive model for structured clays is presented. The model is based on an existing constitutive model for reconstituted clays. It uses a fixed relationship between change in sensitivity and plastic strain to represent destructuration so that all

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A Three-Phase Constitutive Model for Estimating the

A Three-Phase Constitutive Model for Estimating the Elastic Moduli and The Strengths of Granular Composite Materials - Volume 29 Issue 4 - P.-J. Lin Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

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A fully coupled constitutive model for

1. Introduction [2] The thermohydromechanical (THM) coupling, influencing heat and mass transport in deformable porous media has received increasing attention in various branches of science and engineering, primarily due to its importance to processes such as secondary enhancement of oil production, storage of thermal energy in the form of sensible and latent heat, remediation of ...

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A basic hypoplastic constitutive model for sand

Moreover, the constitutive model needs to be re-calibrated for the same material but with different initial densities. The hypoplastic constitutive model with critical state presents a major achievement by introducing the void ratio as an additional state variable into24

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Constitutive model for rate-independent behavior of

Full Text PDF (3034 K) PDF-Plus (615 K) Citing articles Constitutive model for rate-independent behavior of saturated frozen soils S.A. Ghoreishian Amiri, G. Grimstad, M. Kadivar, S. Nordal Norwegian University of Science and Technology

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Microplane constitutive model for porous isotropic

The paper deals with constitutive modelling of contiguous rock located between rock joints. A fully explicit kinematically constrained microplanetype constitutive model for hardening and softening nonlinear triaxial behaviour of isotropic porous rock is developed.

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Materials Free Full-Text A Statistical Damage

A Statistical Damage Constitutive Model Based on the Weibull Distribution for Alkali-Resistant Glass Fiber Reinforced Concrete by Zhende Zhu 1,2, Cong Zhang 1,2,*, Songsong Meng 1,2, Zhenyue Shi 3, Shanzhi Tao 1,2 and Duan Zhu 1,2 1 ...

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A morphology based constitutive model for high density

A morphology based constitutive model for ductile and brittle failures of HDPE is developed. The model captures the transition from ductile to brittle failure as corrosion level increases. The model is calibrated and validated by tensile tests on HDPE exposed to a

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An elastoplastic constitutive model for soft rock with

The aim of the present paper is to construct a constitutive model of soft rock that can describe not only the strainhardening behaviour, but also the strainsoftening behaviour. An elastoplastic constitutive model for soft rock is derived by introducing a stress

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Physically Based Constitutive Model for Body Centered

Physically Based Constitutive Model for Body Centered Cubic Metals with Applications to Iron Amin Almasri, S.M.ASCE; and George Z. Voyiadjis, F.ASCE Full text Download Tools Add to Favorites Abstract A constitutive model is developed in this work to ...

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A kinematic hardening constitutive model for natural

A rate-independent constitutive model for natural clays is presented, formulated within the framework of kinematic hardening with elements of bounding surface plasticity. The modelling framework is intended to include effects of damage to structure caused by ...

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(PDF) Constitutive model for overconsolidated clays

Based on the relationships between the Hvorslev envelope, the current yield surface and the reference yield surface, a new constitutive model for overconsolidated clays is proposed.

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