Micromechanical analysis of damage evolution in splitting test of asphalt mixtures
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- 作者：Ye-kai Chen (1) cheops@scut.edu.cn
Jiang-miao Yu (1)
Xiao-ning Zhang (1) - 关键词：Key words asphalt mixture ; digital image techniques ; X ; ray computerized tomography ; finite element method ; damage behavior
- 刊名：Journal of Central South University of Technology
- 出版时间：June 2010
- 出版年：2010
- 期刊代码：pc528_1005-9784
- 类别：et
- 卷：17
- 期：3
- 页码：628-634
- 数据来源：sp
摘要
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.