FILLER-MATRIX DEBONDING IN GLASS BEAD-FILLED POLYSTYRENE

The debonding process in a glassy polymer filled with glass beads duri ng constant strain rate tensile loading has been analysed both theoret ically and experimentally. A model which combines concepts of damage m echanics and the time dependence of interfacial strength has been prop osed and compared with experimental results on glass bead-filled polys tyrene. The stress-strain behaviour and the debonding could be modelle d using a Bartenev-type relation for the destruction of the interfacia l bond and by considering the gradual transformation on the initially well-bonded composite into foam. A good agreement between calculated a nd experimental data was achieved.