Caracterizacion de la interfase en un ensayo a doble cortante pull-push usando un problema inverso y la Mecanica de la Fractura Finita

The Coupled Criterion of Finite Fracture Mechanics (CCFFM) applied to the Linear Elastic-(perfectly) Brittle Interface Model (LEBIM) has proven to be a robust and reliable tool for the characterization of interface crack onset and growth at several scales. In the present investigation, this formulation is used to analyse the interface crack behaviour in the adhesive joint between a composite laminate (reinforcement) and a concrete block in the double pull-push shear test. The study includes the use of an analytical solution of the problem (based on a beam model) together with experimental data of several test configurations as input for an inverse problem with the aim to estimate the interface strength and toughness that characterize the interface. Numerical models including previous obtained parameters are also analysed. These models allow the study of interface crack onset and propagation.