Elastic–Adhesive Interface Effect on Effective Elastic Moduli of Fiber-Reinforced Asphalt Concrete with Large Deformation

Abstract

A methodology has been developed to account for the elastic–adhesive interface effect on the effective elastic moduli of fiber-reinforced asphalt concrete. To consider the large deformation of asphalt mixtures, the nonlinear factor related to the second-order term of strain was first proposed. The effective medium method was introduced to obtain the closed form for the elastic moduli of isotropic asphalt concrete reinforced by unidirectional isotropic fibers of a circular cross section. The elastic and adhesive coefficients were used to describe the interface effect. To reveal the influence of interface microstructure in asphalt concrete quantitatively, some numerical examples are given. It was found that the effective elastic moduli showed significant variation with the interface microstructure in asphalt concrete, especially with the small radius of fibers. The interface effect with a large deformation of asphalt concrete was also examined in detail.