Study of the internal mechanical response of an asphalt mixture by 3-D discrete element modeling

Feng, Huan; Pettinari, Matteo; Hofko, Bernhard; Stang, Henrik

doi:10.1016/j.conbuildmat.2014.12.022

Cited by 38 publications

(14 citation statements)

References 14 publications

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“…The parameters of the macroscopic Burger's model can then be converted into the microscopic model parameters. In this study, it was also chosen to equate the normal and shear direction parameters of Burger's contact model (Liu and You 2008;Adhikari and You 2010;Feng et al 2015).…”

Section: Calibrations Of Burger's Modelmentioning

confidence: 99%

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Three Different Ways of Calibrating Burger’s Contact Model for Viscoelastic Model of Asphalt Mixtures by Discrete Element Method

2015

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In this paper the viscoelastic behavior of asphalt mixture was investigated by employing a three-dimensional discrete element method. Combined with Burger's model, three contact models were used for the construction of constitutive asphalt mixture model with viscoelastic properties in the commercial software PFC 3D , including the slip model, linear stiffness-contact model, and contact bond model. A macro-scale Burger's model was first established and the input parameters of Burger's contact model were calibrated by adjusting them so that the model fitted the experimental data for the complex modulus. Three different approaches have been used and compared for calibrating the Burger's contact model. Values of the dynamic modulus and phase angle of asphalt mixtures were predicted by conducting DE simulation under dynamic strain control loading. The excellent agreement between the predicted and the laboratory test values for the complex modulus shows that DEM can be used to reliably predict the viscoelastic properties of asphalt mixtures.

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Section: Calibrations Of Burger's Modelmentioning

confidence: 99%

“…However, the same conventional approach of calibrating the Burger's model has been used by many different researchers. Based on previous research (Feng et al 2015), three different ways of calibrating the Burger's model were further investigated in this paper.…”

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confidence: 99%

Three Different Ways of Calibrating Burger’s Contact Model for Viscoelastic Model of Asphalt Mixtures by Discrete Element Method

2015

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“…Among them, the finite element method is suitable for a simulation situation when the strain level is small (i.e., small deformation), and the discrete element method has the advantage of simulating large deformation or cracking problems; this method is especially used for the study of discontinuous particulate materials such as asphalt mixtures. For example, the discrete element method was used to simulate the splitting test [5][6][7], the virtual uniaxial creep test [8], the virtual fatigue test of the trabecular specimen [9], and the prediction of the asphalt mixture dynamic modulus [10], creep stiffness [11], and so on. ese studies mainly focused on the splitting, modulus, and fatigue properties of an asphalt mixture, and the content of the shear test simulation of an asphalt mixture was relatively rare.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Virtual Test of Torsion Shear for Asphalt Mixture

Xie

Yang

2019

Advances in Materials Science and Engineering

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In order to analyze the torsional shear process of asphalt mixtures in a microscopic view, the numerical simulation of a torsional shear test of an asphalt mixture was carried out by discrete element method. Based on the defects of existing algorithms, the method of random reconstruction of the existing 3D model of the asphalt mixture was improved, and a new reconstruction method was proposed. A 3D numerical model of the asphalt mixture contained irregular-shaped coarse aggregate, mineral gradation, and asphalt mortar; furthermore, the particle algorithm established the air void distribution. Then, the numerical simulation of the asphalt mixture’s torsional shear was completed; in addition, the stress, displacement, and contact of the specimens at each stage were analyzed. The results showed that the stress and displacement in different stages changed greatly with the loading, i.e., the crack generated from a weak point on the surface and then spread to the ends with an oblique angle of about 45°. At the same time, the shear failure process of the asphalt mixture was studied. The virtual test method could accomplish the implementation of the numerical simulation of torsional shear; it also provided a good research method for analysis of the asphalt mixture’s shear failure process.

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“…Advanced particulate numerical modeling methods, such as discrete element modeling (DEM) and molecular dynamics, have helped in understanding the microscopic origin of shear strength in particulate assemblies [4,11,14,15,20,29,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44]. Although DEM is very closely related to molecular dynamics; hence this method has generally been distinguished by its inclusion of rotational degree-offreedom as well as stateful contact and often complicated geometries.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Analysis of Compaction and Drilling of Granular Media- A Review

Okorie¹

2017

J Geol Geophys

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Granular matter is ubiquitous in our daily life yet far from completely understood. These granular materials have constituted a class of complex systems which exhibit global behaviors been reminiscent of solids, liquids, gases, or otherwise uniquely their own. The key to achieve good properties lies in the material structure from the molecules, via structures on nano and micro levels to the macroscopic material. This paper also reviewed selected approaches and models that have been developed for granular media prediction. However, development of new approaches at the micro and nano scales to sense the stress distribution characteristics of complex rock media, especially the grounds bearing petroleum resources of Nigeria has been of vital concern/importance to the area of petroleum drilling and exploration. By conducting such fundamental level research, development of highly efficient drilling processes with potentially much less energy inputs and minimizing the carbon blue prints is the best approach.

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Study of the internal mechanical response of an asphalt mixture by 3-D discrete element modeling

Cited by 38 publications

References 14 publications

Three Different Ways of Calibrating Burger’s Contact Model for Viscoelastic Model of Asphalt Mixtures by Discrete Element Method

Three Different Ways of Calibrating Burger’s Contact Model for Viscoelastic Model of Asphalt Mixtures by Discrete Element Method

Numerical Simulation Virtual Test of Torsion Shear for Asphalt Mixture

Micromechanical Analysis of Compaction and Drilling of Granular Media- A Review

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