Simulação do comportamento mecânico de misturas asfálticas usando um modelo computacional multi-escala

Abstract

iven that asphalt mixtures are composite materials, their behavior is fundamentally determined by the local behavior of their constituents, their volume fraction and their physical-chemical interactions. Thus, in order to better understand the mechanical response of asphalt mixtures, it is necessary the use of methodologies that accurately consider the characteristics and phenomena that occur in smaller scales. A methodology that has been very studied and applied by the international scientific community is the so-called multi-scale modeling. The aim of the present paper is to describe and apply a computational multi-scale model to the numerical simulation of commonly used tests, such as the indirect tension test (Brazilian test) and the fatigue beam test. From the simulations of the indirect tension test, it was observed that the numerical results are in agreement with the experimental ones. In the case of cyclic loading, no experiments were performed, but the numerical results show that the model may qualitatively simulate both fatigue cracking and accumulation of permanent deformations.