NUMERICAL IMPLEMENTATION OF A HYPERELASTIC-VISCOPLASTIC DAMAGE MODEL FOR ASPHALT CONCRETE MATERIALS AND PAVEMENTS

摘要

The algorithmic aspects and the numerical implementation of a new multidimensional hyperelastic-viscoplastic-damage model for asphalt concrete are presented. A predictor-corrector algorithm is developed, the algorithmic moduli are computed and the model is implemented into the finite element environment ABAQUS~® and is used for the simulation of several experimental results as well as for the analysis of a section of a pavement. The proposed strain energy function is expressed in terms of the invariants of the deviatoric left Cauchy-Green strain tensor as well as of the volume ratio J. A unique feature of the paper is that experiments are treated both as homogeneous (local) and as boundary value problems (global) and the model's simulations for each case are compared.