A Study on Impact Fracture Behavior of Asymmetrically Laminated Glass.

This paper describes the analysis of impact fracture of asymmetrically laminated glass, which consist of two different thickness glasses and polyvinyl butyral film, using the discrete element method (DEM). Asymmetrically laminated glass beams with both ends fixed are analyzed when a cylindrical rigid body impacts on the center of beams with a certain initial velocity. The DEM is applied to simulate the impact fracture behavior of several asymmetrically laminated glass beams. From the numerical analysis it is obvious that the first peak value of impact force of asymmetrically laminated glass having impact surface at the thinner glass side is less than one of laminated glass and penetration energy of asymmetrically laminated glass is larger than one of laminated glass. From above reasons, it is concluded that asymmetrically laminated glass is in safety than laminated glass as windshield glass.