Modelo para Materiales Compuestos con Deslizamiento de Fibras

Abstract

A constitutive model for long fiber reinforced composites that takes into account fiber debonding is presented in this paper. The model is formulated in the context of mixture theory, with two components: matrix and fiber. The fiber response is linked to the interface behavior. In this way, bonding mechanism experimentally observed can be simulated at macroscopic level. As there is no need to dicretisize the fibers or the interface, the resultant model is useful to simulate structural problems at the macroscopic level. A return mapping algorithm that simultaneously integrates the constitutive equations of the fibers and the interface is developed. The paper is completed with application examples and comparisons with experimental results of reinforced concrete elements that show the ability of the proposed model.