Analysis of Surface Crack Propagation of Asphalt Pavement

The usage limit of road decreases with the appearance of asphalt pavement early crack.In order to study the propagation behavior of asphalt pavement surface crack in use,the change law of the stress intensity factor K11 of surface crack was analyzed under moving load with the commerce FEM software ABAQUS based on fracture mechanics theory.The response of asphalt pavement with surface crack was studied under the condition of different crack depth and different frictional contact status between layers.The effects of pavement parameters such as surface thickness and surface modulus and base modulus on the crack propagation were discussed.Some theoretical reference was provided for the rational design of semi-rigid asphalt pavement and for the maintenance and rehabilitation of asphalt pavement.