Simulation Analysis of Cracking Process of Asphalt Concrete Beam Specimen Based on Cohesive Zone Model and Extended Finite Element

Abstract

In order to simulate and analyze the cracking process of asphalt concrete beam specimens under loading, the elastic modulus, cracking strength and fracture energy of asphalt concrete were measured through direct tensile test and three-point bending test. Then, the Cohesive zone model (CZM) and extended finite element method (XFEM) were utilized to simulate the crack propagation process of the specimen under three-point bending loading, and the numerical simulation results were compared and analyzed. The results show that the crack propagation process can be well simulated by using the XFEM and CZM. During the cracking process, the propagation angle was related to the crack position, and the release rate of damage dissipation energy reflected the crack propagation rate.