THE EFFECT OF TEMPERATURE DEVELOPMENT DURING STONE IMPACT ON DAMAGE MORPHOLOGY AND ADHESION OF ORGANIC COATINGS

The influence of the heat generation induced by stone impact events is shown to be significant for the damage process of organic coatings. E xperimental results on different water-soluble coatings are presented, indicating a rise in surface temperature of more than 80 degrees C du ring single impacts with kinetic energies of more than 0.01 J. This te mperature dissipates within a few tens of milliseconds. The damage mor phology is determined by brittle fracture processes and plastic deform ation effects in the case of low and high impact induced temperatures, respectively.