Calculation of debonding strength at the interface of particles with different shapes and matrix

The debonding process at the interface of filler-matrix is studied. The relevance of this process lays in its triggering effect of toughening mechanisms in polymer based composites. Based on a micromechanical model, a general approach of the debonding condition was derived. The proposed expression was applied for different particle shapes: spherical, ellipsoid, cubic, rectangular and fiber. Results of debonding strength versus geometric parameters of the different particles showed that oblate ellipsoids and cubic particles can be easily analyzed as spherical filler.