A macroscopic constitutive law for elasto-plastic multilayered materials with imperfect interfaces : application to reinforced soils
Résumé
This paper concerns the formulation of a macroscopic constitutive relation for multilayered materials with imperfect interface, which allows taking into consideration the possibility of slipping at the interface of constituents. The model is developed using the homogenization approach assuming elasto-plastic behavior for constituents. The paper is composed of three parts. The first one presents the mathematical formulation of the macroscopic constitutive relation. The second describes the numerical implementation of this relation in a finite element program. The last part concerns the use of this constitutive relation to study the influence of the interface properties on the behavior of reinforced soils. Results of numerical simulations show the necessity of the consideration of slipping at the soil-reinforcement interface in the calculation of reinforced earth structures.