Three-Dimensional Discrete Element Models for Asphalt Mixtures

You, Zhanping; Adhikari, Sanjeev; Dai, Qingli

doi:10.1061/(asce)0733-9399(2008)134:12(1053)

Cited by 161 publications

(56 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A 4-node bilinear plane strain quadrilateral element (CPE4) was used in the simulations. The main motivation for simulating the RVEs as a 20 Int J Adv Eng Sci Appl Math (March-December 2011) 3(1-4): [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] plane strain problem instead of a plane stress problem is that roads and pavements can be assumed as a plane strain. However, both plane stress and plane strain have limitations.…”

Section: Effect Of Changing the Asphalt Concrete Microstructural Morpmentioning

confidence: 99%

“…The majority of these models have Int J Adv Eng Sci Appl Math (March-December 2011) 3(1-4): 14-33 15 combined simple linear facture mechanics principles with the DEM, but very few have considered linear viscoelasticity together with damage in these DEM simulations. See You et al [33] and the reference quoted therein for a complete review on the use of DEM in modeling asphalt concrete mixtures. None of the above aforementioned studies considered the coupled thermoviscoelastic, thermo-viscoplastic, and thermo-viscodamage behavior of asphalt mixes which are very important for predicting the overall thermo-mechanical response of asphaltic mixtures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Al‐Rub

You

Masad

et al. 2011

Int J Adv Eng Sci Appl Math

View full text Add to dashboard Cite

This paper focuses on the meso-scale computational modeling of the thermo-mechanical response of asphalt concrete mixes using for the first time a compressive coupled thermo-viscoelastic, thermo-viscoplastic, and thermo-viscodamage constitutive model. Asphalt concrete is represented by two-dimensional images of the microstructure that consist of three phases: aggregate, matrix, and interfacial transmission zone (ITZ). The matrix and ITZ are considered as thermo-viscoelastic, thermo-viscoplastic, and thermo-viscodamaged materials, while the aggregate is considered to be elastic. The effects of variation in aggregate shape, distribution, volume fraction, ITZ strength, strain rate, and temperature on the degradation and micro-damage patterns in asphalt concrete are investigated under uniaxial tension, compression, and repeated creep-recovery loading conditions. It is concluded that the aggregate volume fraction and distribution significantly influence the micromechanical response of asphalt concrete. Additionally, the results indicate that the constitutive model presented in this paper can provide a computational tool for predicting the overall macroscopic behavior of asphalt concrete based on the distribution of the microstructure constituents and the properties of these constituents. As such, the results of this computational model can be used to guide the design of asphalt concrete mixtures.

show abstract

Section: Effect Of Changing the Asphalt Concrete Microstructural Morpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Al‐Rub

You

Masad

et al. 2011

Int J Adv Eng Sci Appl Math

View full text Add to dashboard Cite

show abstract

“…Lu et al proposed a modeling method in which overlapping balls were used to form clumps using a simple procedure that controls the sphericity, angularity and surface texture of the clump to model the real ballast particles (Lu and McDowell 2007). Using a high-resolution scanner, You et al (2008) captured the 2D microstructure of the asphalt concrete mixture, and a 3D model at a depth of 32 mm was generated by using four 2D models, each of which was duplicated 12 times, approximately 8 mm deep. To simulate the real asphalt mixtures of different aggregate gradations, shapes and angularity distributions, Yu and Shen established a DEM particle library with representative particles that were generated by clumping tens of balls together in PFC3D to match the scanning image obtained from the tests Shen 2012, 2013).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the failure process of soil–rock mixtures through computed tomography and PFC3D models

Sun

Xing

et al. 2018

Int J Coal Sci Technol

View full text Add to dashboard Cite

Soil-rock mixture (SRM) is a unique type of geomaterial characterized by a heterogeneous composition and a complicated structure. It is intractable for the continuum-based soil and rock mechanics theories to accurately characterize and predict the SRM's mechanical properties. This study reports a novel numerical method incorporating microfocus computed tomography and PFC3D codes to probe the deformation and failure processes of SRM. The three-dimensional (3D) PFC models that represent the SRM's complex structures were built. By simulating the entire failure process in PFC3D, the SRM's strength, elastic modulus and crack growth were obtained. The influence of rock ratios on the SRM's strength, deformation and failure processes, as well as its internal mesoscale mechanism, were analyzed. By comparing simulation results with experimental data, it was verified that the 3D PFC models were in good agreement with SRM's real structure and the SRM's compression process, deformation and failure patterns; its intrinsic mesomechanism can be effectively analyzed based on such 3D PFC models.

show abstract

“…DEM is, therefore, mostly used to model grains, soil, fractured rock, masonry structures like domes and arches. DEM is used extensively to study granular media of no cohesion (Cundall, Strack, 1979), soils with cohesion (Liu et al, 2003;Yao, Anandarajah, 2003), rock (Moon et al, 2007;Potyondy, Cundall, 2004), asphalt (You, Buttlar, 2004;You et al, 2008;Liu, You, 2009), geotechnical and geological studies (Campbell et al, 1995;Hardy, Finch, 2006;Hazzard, Young, 2004), for the interaction of granular media (soil and rock) (Kanou et al, 2003). In the last two decades the DEM has been successfully applied in various areas of mining, powder metallurgy, civil engineering and in the oil industry.…”

Section: Introduction Of the Discrete Element Methodsmentioning

confidence: 99%