Mesomechanical modeling of the thermo-viscoelastic, thermo-viscoplastic, and thermo-viscodamage response of asphalt concrete

Al‐Rub, Rashid K. Abu; You, Taesun; Masad, Eyad; Little, Dallas N.

doi:10.1007/s12572-011-0028-9

Cited by 30 publications

(15 citation statements)

References 29 publications

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“…The understanding of the plastic behavior of amorphous composites thus appears to be crucial in the design of modern materials. Efforts in theoretical and numerical modelling have been recently performed to study the effects of micro-alloying in metallic glasses [8,9] and of the addition of aggregates in asphalt mixtures [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Finite-size effects in a model for plasticity of amorphous composites

et al. 2016

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We discuss the plastic behavior of an amorphous matrix reinforced by hard particles. A mesoscopic depinning-like model accounting for Eshelby elastic interactions is implemented. Only the effect of a plastic disorder is considered. Numerical results show a complex size dependence of the effective flow stress of the amorphous composite. In particular, the departure from the mixing law shows opposite trends associated to the competing effects of the matrix and the reinforcing particles, respectively. The reinforcing mechanisms and their effects on localization are discussed. Plastic strain is shown to gradually concentrate on the weakest band of the system. This correlation of the plastic behavior with the material structure is used to design a simple analytical model. The latter nicely captures reinforcement size effects in (logN/N)(1/2), where N is the linear size of the system, observed numerically. Predictions of the effective flow stress accounting for further logarithmic corrections show a very good agreement with numerical results.

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Section: Introductionmentioning

confidence: 99%

Finite-size effects in a model for plasticity of amorphous composites

et al. 2016

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“…The general software ANSYS was adopted to establish the finite element model. Direct tensile test and uniaxial creep test have been used to evaluate the elastic performance and viscoelastic property of asphalt concrete [12,24,26,37]. Therefore, they were adopted to investigate the stress state and effective properties of FRAC in this paper.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Fortunately, micromechanical method is an effective technique to evaluate the internal mechanical behaviors of composites. It had been applied in asphalt concrete successfully [26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Reinforced Mechanism of Fiber Reinforced Asphalt Concrete Based on Micromechanical Modeling

Gao

Guo

et al. 2017

Advances in Materials Science and Engineering

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Short fibers have been widely used to prepare the fiber reinforced asphalt concrete (FRAC). However, internal interactions between fiber and other phases of asphalt concrete are unclear although experimental methods have been used to design the FRAC successfully. In this paper, numerical method was used to investigate the reinforced mechanism of FRAC from microperspective. 2D micromechanical model of FRAC was established based on Monte Carlo theory. Effects of fiber length and content on stress state of asphalt mortar, effective modulus, and viscoelastic deformation of asphalt concrete were investigated. Indirect tensile stiffness modulus (ITSM) test and uniaxial creep test were carried out to verify the numerical results. Results show that maximum stress of asphalt mortar is lower compared to the control concrete when the fiber length is longer than 12 mm. Fiber reduces the stress level of asphalt mortar significantly. Fiber length has no significant influence on the effective modulus of asphalt concrete. Fiber length and content both have notable impacts on the viscoelastic performance of FRAC. Fiber length should be given more attention in the future design of FRAC except the content.

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“…A development of the material models for the mastic/binder is a very active field of science. Inelastic analyses of AC can be found, e.g., in [2][3][4][5][6][7][8][9][10][11][12][13][14]. For the sake of brevity, we restrict ourselves in this paper only to the linear elastic computations, since we focus in this paper on the synthetic microstructure generation and the multiscale computations.…”

Section: Introductionmentioning

confidence: 99%

Synthetic Microstructure Generation and Multiscale Analysis of Asphalt Concrete

Klimczak

Cecot

2020

Applied Sciences

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In this paper, we present an enhanced framework for the synthetic asphalt concrete (AC) microstructure generation for the numerical analysis purposes. It is based on the Voronoi tessellation concept with some necessary extensions that allow for the reliable generation of the aggregate particles of the given size distribution. The synthetic microstructure generation allows for faster numerical modeling of the novel materials. It can partially replace the X-ray computed tomography approach, which is frequently used in such analysis. Our framework is a kind of compilation of the known techniques with the enhancements applied to expedite the microstructure modeling process. Therefore, the generated microstructure is used in the numerical upscaling to model the macroscale asphalt concrete properties. We restrict ourselves (in this paper only) to the 2D elastic computations. We also assume the perfect bonding between these two materials and the static load for the sake of simplicity. The upscaling is performed by the multiscale finite element method (MsFEM). A short recapitulation of the MsFEM foundations as well as the numerical test comparing the overkill mesh solution with the upscaled one is provided in the paper. The test results confirm that the whole presented methodology can serve as a fast and reliable tool for the tests on novel asphalt mixtures and other heterogeneous materials. It can reduce the cost of the design process substituting some of the laboratory experiments, giving the opportunity to test the developed constitutive models and expedite the numerical analysis itself.

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Mesomechanical modeling of the thermo-viscoelastic, thermo-viscoplastic, and thermo-viscodamage response of asphalt concrete

Cited by 30 publications

References 29 publications

Finite-size effects in a model for plasticity of amorphous composites

Finite-size effects in a model for plasticity of amorphous composites

Investigation on Reinforced Mechanism of Fiber Reinforced Asphalt Concrete Based on Micromechanical Modeling

Synthetic Microstructure Generation and Multiscale Analysis of Asphalt Concrete

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