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A platform for research: civil engineering, architecture and urbanism
Micromechanical Analysis on Asphalt Mixture Fatigue Damage Considering Volumetric Property
This paper presents a microstructural level finite element (FE) model of asphalt mixture for four point bending beam fatigue analysis. Digital image processing techniques were applied to convert a conventional image into numerical model of asphalt mixture, which contains the actual material heterogeneity and microstructure. The digital model was modified and designed with different volumetric properties. Subsequently, FE analysis on fatigue damage was conducted with the consideration of 5 levels of air-void and asphalt contents. It was found that the volumetric properties have significant effects on fatigue behaviour of asphalt mixture, the change in asphalt content is more sensitive than air void content change if a controlled strain fatigue loading mode is performed, which proved the traditional research results under laboratory fatigue tests. However, the FE analysis also indicate the difference in results under different loading direction and loading mode when material heterogeneity was take into account. The analysis indicate that the proposed method and model can be extended to other performance analysis such as rutting and low temperature cracking due to its convenience to redesign and to retest with different loading conditions and material properties.
Micromechanical Analysis on Asphalt Mixture Fatigue Damage Considering Volumetric Property
This paper presents a microstructural level finite element (FE) model of asphalt mixture for four point bending beam fatigue analysis. Digital image processing techniques were applied to convert a conventional image into numerical model of asphalt mixture, which contains the actual material heterogeneity and microstructure. The digital model was modified and designed with different volumetric properties. Subsequently, FE analysis on fatigue damage was conducted with the consideration of 5 levels of air-void and asphalt contents. It was found that the volumetric properties have significant effects on fatigue behaviour of asphalt mixture, the change in asphalt content is more sensitive than air void content change if a controlled strain fatigue loading mode is performed, which proved the traditional research results under laboratory fatigue tests. However, the FE analysis also indicate the difference in results under different loading direction and loading mode when material heterogeneity was take into account. The analysis indicate that the proposed method and model can be extended to other performance analysis such as rutting and low temperature cracking due to its convenience to redesign and to retest with different loading conditions and material properties.
Micromechanical Analysis on Asphalt Mixture Fatigue Damage Considering Volumetric Property
Yu, Jiangmiao (author) / Chen, Yekai (author) / Zhang, Xiaoning (author)
2015 International Symposium on Frontiers of Road and Airport Engineering ; 2015 ; Shanghai, China
2015-10-22
Conference paper
Electronic Resource
English
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