Abstract
In the design of the asphalt pavement or asphalt overlay, consider about the viscoelastic fracture mechanics behavior of asphalt mixture is significant in researching the asphalt pavement craze or the extending behavior of reflective crack. This paper employs nonlinear finite element software ABAQUS to analysis about the viscoelastic of asphalt mixture in the basis of the vicoelastic breaking theory, analyze the Traffic dynamic loading different speeds, different grassroots modulus to contain crack pavement structure system of the displacement field and stress field of influence.The calculation results show that the curve of the stress intensity factor in the crack tip moves as the increase of the speed, but the maximum is virtually unchanged; and it is proportional to the grassroots modulus variations, that is the stress intensity factor increases as the increase of grassroots modulus. With the effect of partial load, the stress intensity factor is formed by KⅠ、KⅡ. It is mainly assumed by KⅡ when grassroots modulus is low, and as the grassroots modulus increases, the KⅠ is increases, But KⅡ changes little.
Published Version
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