Micromechanical analysis of damage evolution in splitting test of asphalt mixtures

Abstract

A methodology was presented relating the microstructure of asphalt mixtures to their damage behavior. Digital image techniques were used to capture the asphalt mixture microstructure, and the finite element method was used to simulate the damage evolution of asphalt mixture through splitting test. Aggregates were modeled to be linearly elastic, and the mastics were modeled to be plastically damaged. The splitting test simulation results show that the material heterogeneity, the properties of aggregates and air voids have significant effects on the damage evolution approach. The damage behavior of asphalt mixture considering material heterogeneity is quite different from that of the conventional hypothesis of homogeneous material. The results indicate that the proposed method can be extended to the numerical analysis for the other micromechanical behaviors of asphalt concrete.

Keywords

asphalt mixture / digital image techniques / X-ray computerized tomography / finite element method / damage behavior

References

[1] HashinZ.. The elastic moduli of heterogeneous materials [J]. Journal of Applied Mechanics, 1962, 29: 143-192

[2] HashinZ., ShtrikmanS.. A variational approach to the theory of the elastic behaviour of multiphase materials [J]. Journal of the Mechanics and Physics of Solids, 1963, 11: 127-167

[3] SOARES J B, COLARES F A, ALLEN D H. Considering material heterogeneity in crack modeling of asphaltic mixture [J]. Journal of the Transportation Research Board, 2003: 113–120.

[4] YouZ., ButtlarW. G.. Discrete-element modeling to predict the modulus of asphalt concrete mixtures [J]. Journal of Materials in Civil Engineering, 2004, 16(2): 140-146

[5] LiuY., DaiQ.-l., YouZ.-ping.. Viscoelastic model for discrete element simulation of asphalt mixture [J]. Journal of Engineering Mechanics, 2009, 135(4): 324-333

[6] AbbasA., MasadE., PapagiannakisT., HarmanT.. Micromechanical modeling of the viscoelastic behavior of asphalt mixtures using the discrete-element method [J]. International Journal of Geomechanics, 2007, 7(2): 131-139

[7] DaiQ.-l., YouZ.-ping.. Prediction of creep stiffness of asphalt mixture with micromechanical finite-element and discrete-element models [J]. Journal of Engineering Mechanics, 2007, 133(2): 163-173

[8] MasadE., SomadevanN.. Microstructural finite-element analysis of influence of localized strain distribution on asphalt mix properties [J]. Journal of Engineering Mechanics, 2002, 128(2): 1105-1114

[9] KOSE S, GULER M, BAHIA H U, MASAD E. Distribution of strains within hot-mix asphalt binders [J]. Journal of the Transportation Research Board, 2000: 21–27.

[10] PAPAGIANNAKIS A T, ABBAS A, MASAD E. Micromechanical analysis of viscoelastic properties of asphalt concretes [J]. Journal of the Transportation Research Board, 2002: 113–120.

[11] BIRGISSON B, SANGPETNGAM B, ROQUE R. Predicting viscoelastic response and crack growth in asphalt mixtures with the boundary element method [J]. Journal of the Transportation Research Board, 2002: 129–135.

[12] MasadE., JandhyalaV. K., DasguptaN., SomadevanN., ShashidharN.. Characterization of air void distribution in asphalt mixes using X-ray computed tomography [J]. Journal of Materials in Civil Engineering, 2002, 14(2): 122-129

[13] TashmanL., MasadE., AngeloJ. D., BukowskiJ., HarmanT.. X-ray tomography to characterize air void distribution in superpave gyratory compacted specimens [J]. International Journal of Pavement Engineering, 2002, 3(1): 19-28

[14] WangL. B., PaulH. S., HarmanT., AngeloJ. D.. Characterization of aggregates and asphalt concrete using X-ray computerized tomography: A state-of-the-art report [J]. Journal of the Association of Asphalt Paving Technologists, 2004, 73: 467-500

[15] YuJ.-m., LiX.-j., WangD.-y., ZhangX.-ning.. Finite element modeling of asphalt mix with X-ray computerized tomograph processing [J]. Journal of Chang’an University: Natural Science Edition, 2006, 26(1): 16-19

[16] LublinerJ., OliverJ., OllerS., OñateE.. A plastic-damage model for concrete [J]. International Journal of Solids and Structures, 1989, 25: 299-329

[17] HillerborgA., ModeerM., PeterssonP. E.. Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements [J]. Cement and Concrete Research, 1976, 6: 773-782

[18] SorensonH. K.ABAQUS Theory and Users Manual Version 6.8 [M], 2008, Rhode Island, Pawttucket, Inc.