13th International Conference on Fracture June 16–21, 2013, Beijing, China -8- (d) RVEs for 0mm (e) RVEs for 20mm (f) RVEs for 40mm Figure 3. Crack paths for different crack location 0 10 20 30 40 50 10 15 20 25 30 35 Y(mm) X(mm) Experiment Simulation Simulation by Yin et al[20] 0 10 20 30 40 50 10 15 20 25 30 35 Y(mm) X(mm) Experiment Simulation Simulation by Yin et al.[20] (a) 0mm off-center crack (b) 20mm off-center crack 0 10 20 30 40 50 10 15 20 25 30 35 Y(mm) X(mm) Experiment Simulation Simulation by Yin et al[20] 10 15 20 25 30 35 40 45 50 55 10 15 20 25 30 35 Y(mm) X(mm) Experiment(0mm) Simulation(0mm) Simulation by Yin et al.[20](0mm) Experiment(20mm) Simulation(20mm) Simulation byYin et al.[20](20mm) Experiment(40mm) Simulation(40mm) Simulation byYin et al.[20](40mm) 40mm off-center crack Total merged plot for three crack locations Figure 4. Experimental and numerical crack paths of three kinds of crack A numerical two-dimensional micromechanical modeling frame considering the heterogeneity feature has been developed to simulate the cracking behavior of asphalt concrete based on the aggregate generation and packing algorithm. Incorporating a damage mechanics approach with this solution allowed the development of a softening model capable of predicting typical global inelastic behavior found in asphalt materials, the proposed model used to compare between the computer simulated results and experimental data of the cracked three-point bending beam, the results showed that the overall agreement is satisfactory. Acknowledgements This work is supported by the National Natural Science Foundation of China (Grant No.
RkJQdWJsaXNoZXIy MjM0NDE=