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exposing the nonlinear viscoelastic behavior of asphalt

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Exposing the nonlinear viscoelastic behavior of asphalt ...

高达12%返现  Apr 16, 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

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Exposing the nonlinear viscoelastic behavior of asphalt ...

The nonlinear viscoelastic correspondence principle developed by Schapery is applied to separate the influences of these two mechanisms to the stress-strain hysteresis behavior of asphalt concrete.

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Exposing the nonlinear viscoelastic behavior of asphalt ...

May 01, 2012  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 introduced; it is defined as ...

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Exposing the nonlinear viscoelastic behavior of asphalt ...

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'.

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Nonlinear viscoelastic analysis of unaged and aged

Nov 01, 2008  Haj-Ali and Muliana developed a recursive-iterative integration algorithm to analyze the nonlinear viscoelastic behavior of polymeric materials. 2. Objectives and scope of the studyPrevious work has shown that asphalt binders exhibit nonlinear viscoelastic behavior especially under high strain levels that binders may experience in the mix.

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Analysis of Nonlinear Viscoelastic Properties of Asphalt ...

Apr 26, 2012  This study presents characterization of the nonlinear viscoelastic behavior of hot mix asphalt (HMA) at different temperatures and strain levels using the Schapery nonlinear viscoelastic model. This model is employed to describe experimental measurements of two asphalt mixes under several combined temperatures and strain levels.

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Nonlinear viscoelastic response of asphalt binders: An ...

Jul 01, 2012  1. Introduction. The viscoelastic response of asphalt binders, that is exhibited over a range of temperature starting from the binders’ glass transition temperature to about 70–80 °C, is nonlinear.Several experimental investigations have documented this nonlinearity of the viscoelastic response of asphalt binders.

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Nonlinear viscoelastic analysis of unaged and aged asphalt ...

Nov 01, 2008  Haj-Ali and Muliana developed a recursive-iterative integration algorithm to analyze the nonlinear viscoelastic behavior of polymeric materials. 2. Objectives and scope of the studyPrevious work has shown that asphalt binders exhibit nonlinear viscoelastic behavior especially under high strain levels that binders may experience in the mix.

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IRRECOVERABLE AND RECOVERABLE NONLINEAR

nonlinear viscoelastic behavior of the asphalt concrete can be represented by a nonlinear generalized Kelvin model that consists of a nonlinear dash­ pot connected in series with a nonlinear Kelvin chain. Thus, the nonlinear creep strains are separated into irrecoverable and recoverable strains.

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Nonlinearly viscoelastic analysis of asphalt mixes ...

Aug 23, 2007  This study presents the characterization of the nonlinearly viscoelastic behavior of hot mix asphalt (HMA) at different temperatures and strain levels using Schapery’s model. A recursive-iterative numerical algorithm is generated for the nonlinearly viscoelastic response and implemented in a displacement-based finite element (FE) code. Then, this model is employed to describe experimental ...

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NONLINEAR VISOELASTIC BEHAVIOR OF ASPHALT CONCRETE

Mar 16, 1998  The actual nonlinear properties, the practical effects of the nonlinearity, and the best way to characterize asphalt concrete remain obscure. This study is to investigate the nonlinear viscoelastic behavior of asphalt concrete in stress relaxation under uniaxial-stress conditions at temperatures and at strains that a pavement might undergo.

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Viscoelastic Tension-Compression Nonlinearity in Asphalt ...

It has been shown that the nonlinear viscoelastic behavior of the asphalt concrete can be represented by a nonlinear generalized Kelvin model that consists of a nonlinear dashpot connected in ...

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Viscoelastic Nonlinear Multilayered Model for Asphalt ...

Feb 14, 2014  Flexible pavements are multilayer structures, typically with a viscoelastic asphalt layer followed by nonlinear unbound/bound layers. Conventionally, multilayered elastic analysis is performed to obtain the response of flexible pavements for design and inverse analyses; however, assuming asphalt pavement to be a linear elastic material is an oversimplification of its actual behavior.

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Difference between Nonlinear viscoelasticty and ...

That behavior can be linear or non-linear. ... I'm trying to simulate asphalt layers with Viscoelastic behavior in ABAQUS. First of all, we must define a elastic property of asphalt, E and v ...

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Nonlinear dynamic moduli in asphalt SpringerLink

It is probable that asphalt as a part of paving mixture is exposed to large deformations. Hence a better understanding of asphalt behavior in large amplitude oscillations (LAOS) is needed. LAOS experimental results for a base asphalt and its blend with radial SBS polymer are

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Viscoelastic, Viscoplastic, and Damage Modeling of Asphalt ...

The behaviour under load of asphalt concrete (AC) was viewed as additively separable into viscoelastic and viscoplastic components, and the study focused on modelling the pre-peak response of the ...

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Viscoelastic analysis of flexible pavement — Ansys ...

Jun 19, 2019  The pavement have 5 different soil layers: asphalt, base, subbase, compacted subgrade and subgrade (native soil). This is why I created separate discussion topics" one for viscoelastic and another for nonlinear. I can continue to discuss both on this

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A UNIFIED METHOD FOR THE ANALYSIS OF NONLINEAR ...

binder nonlinear viscoelastic behavior, (vi) effects of binder oxidative aging as a function of time, and (vii) micro crack healing during rest periods. Different methods to assess fatigue cracking in asphalt materials are available in the literature. However, there

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(PDF) Viscoelastic Response of Asphalt-Aggregate Mixes to ...

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 modeling of time- and rate-dependent materials. Part I: Theory

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基于拉压模量同步测试的岩沥青改性沥青混合料疲劳损伤特性

[9] LEVENBERG E, UZAN J. Exposing the Nonlinear Viscoelastic Behavior of Asphalt-aggregate Mixes[J]. Mechanics of Time-dependent Materials, 2012, 16(2):129-143. [10] LIU F, MENG L Y, NING G F, et al. Fatigue Performance of Rubber-modified Recycled Aggregate Concrete (RRAC) for Pavement[J].

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Dali’s melted pocket watch and the behavior of polymer ...

Mar 10, 2018  The linear viscoelastic behavior of conventional asphalt is relatively simple (Polacco et al. 2006), and it resembles the behavior of a low molecular weight polymer. The behavior of such polymers is very well discussed in Baumgardner et al. and in many theoretical and experimental papers dealing with the viscoelasticity of materials.

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Characterizing Nonlinear Viscoelastic Response of ...

Characterizing Nonlinear Viscoelastic Response of Asphaltic Materials May, 2010 University of Texas at Austin Amit Bhasin Arash Motamed Computational models of asphalt composites are increasingly being used to: •investigate relationship between constituent and mixture properties •predict damage evolution in composites

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Non-Linear Viscoelastic and Fatigue Properties of Asphalt ...

non-linear behavior. The non-linear study was expanded to include fatigue performance of binders at varies strain levels in the linear and non-linear range. This paper is intended to simulate the research on the non-linear behavior of binders and to suggest that non-linear properties are essential for effective estimation of role of binders in ...

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The Nonlinear Viscoelastic Behavior for Asphalt Mixture ...

Compressive behavior of asphalt mixture is studied in creep and strain recovery tests observing large nonlinear viscoelastic strains. The nonlinear viscoelastic material model for asphalt mixture is presented, based on a modified version of Schapery’s constitutive relationship. For the description of the nonlinear viscoelastic response of the material, simple creep and recovery tests for ...

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Viscoelastic Tension-Compression Nonlinearity in Asphalt ...

Dec 12, 2015  A new one-dimensional (1D) viscoelastic creep formulation is proposed for modeling the recoverable deformation component in asphalt concrete (AC). The formulation is designed to accommodate different tensile and compressive properties in analogy with bimodular elasticity.

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Understanding Viscoelastic Behavior of Asphalt Binders ...

Asphalt binder is a complex viscoelastic hydrocarbon, whose performance depends upon interaction between its physical and chemical properties, both of which are equally important to the successful understanding of the material. Researchers have proposed various models linking linear viscoelastic (LVE) and microstructural parameters.

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CHARACTERIZATION OF THE NONLINEAR BEHAVIOR OF

The nonlinear viscoelastic behavior of Asphalt Concrete is simulated in Finite Element Analysis (FEA). The X-Ray Computed Tomography scans of the laboratory specimen are converted to a 3D virtual model in image processing software (Simpleware Scan IP). The 3D model is used in FEA by applying boundary conditions and giving mechanical properties ...

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Viscoelastic-based approach to evaluate low temperature ...

Dec 15, 2016  Schapery’s nonlinear viscoelastic model was implemented to characterize viscoelastic behavior of asphalt binders. The finite element (FE) method was carried out to integrate the viscoelastic constitutive equations and simulate BBR test in short and long time creep loading. 4.1. Numerical Implementation of Schapery’s Nonlinear Viscoelastic Model

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A new nonlinear viscoelastic model and mathematical ...

Feb 10, 2020  A simplified nonlinear generalized Maxwell model for predicting the time dependent behavior of viscoelastic materials. World Journal of Mechanics 1 ,

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Experimental Characterization of Viscoelastic Behaviors of ...

Jan 04, 2021  The DSR test developed by SHRP is employed to analyze the dynamic characteristics and evaluate the viscoelastic behavior of asphalt materials [44,45,46]. Compared to static experiments (penetration, softening point, etc.), the DSR test has more intuitive and real advantages to assess the properties of bituminous materials.

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Fatigue response and damage accumulation law of asphalt ...

May 01, 2021  To select these fatigue loads, some researchers used the linear viscoelastic (LVE) limit of asphalt materials as a reference. For instance, Shan el al., selected three stress levels within the nonlinear viscoelastic (NLVE) region of asphalt binder to

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A Nonlinear Fractional Viscoelastic-Plastic Creep Model of ...

The mechanical behavior of asphalt mixture under high stresses presents nonlinear viscoelasticity and permanent deformation. In this paper, a nonlinear fractional viscoelastic plastic (NFVEP) creep model for asphalt mixture is proposed based on the Nishihara model, with a Koeller spring-pot replacing the Newton dashpot.

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A Nonlinear Fractional Viscoelastic-Plastic Creep Model of ...

The mechanical behavior of asphalt mixture under high stresses presents nonlinear viscoelasticity and permanent deformation. In this paper, a nonlinear fractional viscoelastic plastic (NFVEP) creep model for asphalt mixture is proposed based on the Nishihara model, with a Koeller spring-pot replacing the Newton dashpot. The NFVEP model considers the instantaneous elasticity, viscoelasticity ...

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ISSN using ABAQUS software - heighpubs

The introduced another method for determining the viscoelastic behavior of asphalt, for the modeling of inite element. The results of this limited component model in ABAQUS were consistent with ield measurements. Viscoelastic properties of asphalt were obtained using a creep yield test [11].

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Nonlinear dynamic moduli in asphalt, Materials and ...

Aug 08, 2006  It is probable that asphalt as a part of paving mixture is exposed to large deformations. Hence a better understanding of asphalt behavior in large amplitude oscillations (LAOS) is needed. LAOS experimental results for a base asphalt and its blend with radial SBS polymer are discussed in terms of nonlinear dynamic moduli.

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