Review of stress distribution situation and fracture mechanism in flexible pavements using Finite Element Method

Subject Areas : Creep, Fatigue and Fracture Mechanic

علی بابائی ¹ (عضو هیأت علمی و رییس دانشکده مهندسی عمران)

Received: 2015-10-11 Accepted : 2015-10-30 Published : 2015-02-20

Keywords: Finite Element, Stress, Flexible pavement, fracture mechanism,

Abstract :

This paper reviews possible mechanisms of stress distribution and the effect of uniform horizontal and vertical pressures as well as major stress between tire and asphalt in the layers of flexible pavements surface using Finite Element Method. A model of pavement with these layers is made: asphalt concrete course, base course, subbase course and subgrade. Load applied by dual wheel with standard pressure. Results show that when compressive stresses and tension between wheels are very high, fatigue occurred in places that top-down stress have maximum values. While vertical stress is important in all layers, horizontal stress is important only in the contact of surface and base courses.