Abstract
Laminated glass plates were used for the crime prevention glass of a house and the windshield of a vehicle. In this study, the fracture mechanism of the crime prevention glass was made clear by the impact fracture experiments and commercial distinct element method (DEM) software (PFC3D). The laminated glass plate which was superior in the impact and penetration resistance was examined. From the results of the fracture experiments and simulations, the reflection time of the striker was shorted so that the tensile strength of the interlayer constructed poly vinyl butyral (PVB) is higher. After the fracture, it was understood that a lot of cracks of the glass were occurred to the circumference direction and the fragment of the glass became small.
