ABSTRACT
Three point bending test is an important laboratory experiment for asphalt mixture. In this paper, a Finite Element Model (FEM) simulation of this test is done. Bilinear Cohesive Zone Model (CZM) elements are settled in the mid-span of the beam to simulate the damage and fracture of the beam. The result of the simulation is in agreement with the laboratory experiment. Finally, the sensibilities of CZM parameters are studied and the fracture process of the beam is discussed. The result shows that the critical value of traction and the fracture energy of CZM have a great effect on the FEM simulation, while the effect of the initial stiffness of the CZM is not obvious. And it is found that, during the process of the test, the decrease of the bearing capacity of the beam happens after the damage has occurred at the bottom of mid-span.
