Numerical simulation of splitting test of asphalt mixture based on DIP-FEM

作者：Wang, Duan-Yi; Wu, Wen-Liang^*; Zhang, Xiao-Ning; Yu, Jiang-Miao; Li, Zhi

来源：Journal of Jilin University (Engineering and Technology Edition), 2011, 41(4): 968-973.

• Digital image processing (DIP)
• Finite element analysis model
• Indirect tensile test
• Loading direction
• Road engineering
• Specimen images
• Splitting tests
• Stress concentration factors

A finite element analysis model was built for the asphalt mixture including the aggregate, the air void, and the asphalt mastic using the specimen images acquired by industrial CT and the digital image processing (DIP) as well as the finite element modeling (FEM) technique. The splitting tests (indirect tensile tests) of the asphalt mixture were simulated in consideration of the air void distribution, different loading directions, and different aggregate asphalt modulus ratios. The results indicate that the stress concentration factor can be used to describe the distribution of stress inside the asphalt mixture, and the mixture gradation, the modulus ratio, the air void and the loading position affect the simulation results significantly. By the DIP-FEM method the microstructure and the macromechanics of the asphalt mixture can be interrelated well.

• 出版日期2011-7
• 单位华南理工大学