Identification and Modeling of Permanent Deformations of Asphalt Concrete

The accumulation of permanent deformations in asphalt concrete under repeated loading is studied in detail; and a new, multidimensional nonlinear hyperelastic nonassociative plastic model is proposed. The equations describing the model are solved by using a predictor-corrector algorithm. The results of the model are compared with actual experimental data, and the comparison is very favorable. A remarkable result is that the model parameters obtained from experiments at one stress level correctly predict experimental results at another stress level.