T1 - Constitutive Modeling of Asphalt-Aggregate Mixes with Damage and Healing. AU - Levenberg, Eyal. A2 - Uzan, Jacob . PY - 2006. Y1 - 2006. N2 - Asphalt-aggregate mixes are being used throughout the world as a prime construction material for pavements. An asphalt mix is a multiphase heterogeneous material; it is a composite blend of air-voids, asphalt-cement

Get PriceAsphalt-aggregate mixes are being used throughout the world as a prime construction material for pavements. An asphalt mix is a multiphase heterogeneous material; it is a composite blend of air-voids, asphalt-cement (bitumen) and aggregates of a

Get Price16/04/2011 In this study asphalt-aggregate mixes are treated as both viscoelastic and viscoplastic. Following a damage mechanics approach, a nonlinear viscoelastic constitutive formulation is generated from a linear formulation by replacing ‘applied stresses’ with ‘effective viscoelastic stresses’. A non-dimensional scalar entity called ‘relative viscoelastic stiffness’ is

Get PriceThe strain response of asphalt-aggregate mixes to applied stresses is decomposed additively into a viscoelastic part and a viscoplastic part. The paper focuses on the response and modeling of

Get Priceparameters of the models. Constitutive equations for asphalt-aggregate mixes are for-mulated very often using classical rheological models consist-ing

Get PriceA triaxial cross-anisotropic viscoelastic-viscoplastic constitutive model for asphalt aggregate mixtures is developed for the small-strain domain. The model follows the concept of strain decomposition by separately analyzing the viscoelastic and viscoplastic strain components. In order to calibrate the model, advanced triaxial testing was employed which included both

Get Price04/12/2020 Formulation and numerical implementation of non-classical constitutive models of asphalt-aggregate mixes for elastic-viscoplastic deformations. #Abstract Primary objective of this research was the formulation of constitutive equations of elasto-visco-plastic materials, which can be used in numerical simulation of flexible pavement. Commonly ...

Get PriceAsphalt-aggregate mixes are being used throughout the world as a prime construction material for pavements. An asphalt mix is a multiphase heterogeneous material; it is a composite blend of air-voids, asphalt-cement (bitumen) and aggregates of a

Get PriceThe strain response of asphalt-aggregate mixes to applied stresses is decomposed additively into a viscoelastic part and a viscoplastic part. The paper focuses on

Get PriceA triaxial cross-anisotropic viscoelastic-viscoplastic constitutive model for asphalt aggregate mixtures is developed for the small-strain domain. The model follows the concept of strain decomposition by separately analyzing the viscoelastic and viscoplastic strain components. In order to calibrate the model, advanced triaxial testing was employed which included both

Get Priceparameters of the models. Constitutive equations for asphalt-aggregate mixes are for-mulated very often using classical rheological models consist-ing

Get Price01/12/2005 This paper presents an approach for constitutive modeling of the viscoplastic behavior of asphalt mixes. This approach utilizes an anisotropic non-associated flow rule based on the Drucker–Prager yield surface. The selection of this yield surface is motivated by the field stress paths and material properties associated with permanent deformation at high

Get Price01/05/2013 Constitutive equations for asphalt–aggregate mixes are formulated very often using classical rheological models consisting of springs and dashpots , . It is possible to express the constitutive equation of asphaltic materials in terms of fractional-order derivatives of stress and strain. Applying this formulation it is possible to obtain better curve fitting results in the

Get PriceDevelopment and selection of a constitutive law that embodies the different aspects of the observed behavior of asphalt-aggregate mixes-recognizing that these mixes are not isotropic linear elastic materials (which can be fully char acterized with a Young's modulus and a Poisson's ratio), the definition of a constitutive relationship incorporating the most important aspects of

Get Price01/03/2013 Constitutive equations for asphalt-aggregate mixes are formulated very often using classical rheological models consisting of springs and dashpots [24]. The simplest models are the Kelvin-Voigt and Maxwell models consisting of spring and dashpot in parallel and in series, respectively. A more accurate model of viscoelastic behaviour for asphaltic materials is

Get PriceThe model combines a generalized Maxwell model with an elastoplastic one. Then from the creep theory, the linear and nonlinear constitutive equations of the generalized Maxwell model are obtained. From the nonlinear finite element method for the rutting of the asphalt pavement, the rut depths of 4 asphalt-aggregate mixtures are obtained. And ...

Get PriceThe non-linear diﬀerential constitutive relationships of such a model arepresented in the paper. The results of computer simulations are also visualized. Finally, 3D viscoelasticplastic models of asphalt aggregate-mixes are proposed. The models are based on a generalized macroscopic theory taking into account the eﬀect of pressure-dependency onyielding.

Get PriceAsphalt-aggregate mixes are being used throughout the world as a prime construction material for pavements. An asphalt mix is a multiphase heterogeneous material; it is a composite blend of air-voids, asphalt-cement (bitumen) and aggregates of a

Get PriceThe strain response of asphalt-aggregate mixes to applied stresses is decomposed additively into a viscoelastic part and a viscoplastic part. The paper focuses on the response and modeling of the viscoplastic component; it includes the development of a multiaxial constitutive formulation that is capable of generating: (i) strain hardening when the loading is applied in one direction;

Get Price01/12/2005 This paper presents an approach for constitutive modeling of the viscoplastic behavior of asphalt mixes. This approach utilizes an anisotropic non-associated flow rule based on the Drucker–Prager yield surface. The selection of this yield surface is motivated by the field stress paths and material properties associated with permanent deformation at high

Get Price01/05/2013 Constitutive equations for asphalt–aggregate mixes are formulated very often using classical rheological models consisting of springs and dashpots , . It is possible to express the constitutive equation of asphaltic materials in terms of fractional-order derivatives of stress and strain. Applying this formulation it is possible to obtain better curve fitting results in the

Get PriceConstitutive Modeling of Asphalt-Aggregate Mixes with Damage and Healing. By Eyal Levenberg. Uniqueness of the Viscoelastic Time-Function for Asphalt-Aggregate Mixes . By Eyal Levenberg. Multiscale testing-analysis of asphaltic materials considering viscoelastic and viscoplastic deformation. By Taesun You. A thermodynamic framework for constitutive

Get PriceThe model combines a generalized Maxwell model with an elastoplastic one. Then from the creep theory, the linear and nonlinear constitutive equations of the generalized Maxwell model are obtained. From the nonlinear finite element method for the rutting of the asphalt pavement, the rut depths of 4 asphalt-aggregate mixtures are obtained. And ...

Get PriceDevelopment and selection of a constitutive law that embodies the different aspects of the observed behavior of asphalt-aggregate mixes-recognizing that these mixes are not isotropic linear elastic materials (which can be fully char acterized with a Young's modulus and a Poisson's ratio), the definition of a constitutive relationship incorporating the most important aspects of

Get PriceThe non-linear diﬀerential constitutive relationships of such a model arepresented in the paper. The results of computer simulations are also visualized. Finally, 3D viscoelasticplastic models of asphalt aggregate-mixes are proposed. The models are based on a generalized macroscopic theory taking into account the eﬀect of pressure-dependency onyielding.

Get PriceThe theories of continuum damage mechanics and plasticity are combined in a strain‐based phenomenological approach to yield an effective constitutive model for plain concrete. The model reproduces the majority of the typical behavior exhibited by plain concrete: anisotropic stiffness evolution, pressure‐dependent ductility and strength, postpeak dilation, recovery of

Get PricePolyurethane-mixed ballast is a new track structure wherein the ballast particles are bonded or glued by polyurethane binder , . After the reinforcement, the integrity and stability of the ballast bed are significantly improved. In China, it is mainly used in transition zones between ballast track and slab track, and it can also be used to prevent flying ballast in high-speed lines , , , , as ...

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