Numerical simulation of interface debonding during fibre Pull-Out tests

The Pull-Out experiment is used for determination of the bond strength betw een fiber and matrix in fiber reinforced composites. An interface crack gro wth between both constituents and a contact friction behaviour on the crack ed area can be observed in the experiment. In our contribution this mechani cal behaviour of the interface is simulated in the framework of Interface D amage Mechanics. The displacement discontinuities during the progressive de cohesion are related to constitutive equations extended by a damage model. The contact/friction behaviour after complete separation is described by a friction model analogous to the classical theory of plasticity.