Low Velocity Impact Behaviors of a Laminated Glass

Dynamic behaviors of a laminated glass subjected to foreign object impact are studied by the use of the developed finite element program. A finite element simulation based on a higher-order beam finite element and a PVB interlayer model is applied to compute the dynamic responses of laminated glass panel. In this analysis, the glass plies and PVB interlayer are modeled as linear elastic. The results such as the histories of contact force and deflection, and the distribution for strains, stresses through the beam thickness during impact are obtained. The impact behaviors of laminated glass panel are compared with those of the monolithic glass of the same total thickness. It shows that PVB interlayer can be prevented inner glass ply of LG beam from damage by reducing the stress to zero. Specially, stress distribution through the thickness except PVB interlayer in impact analysis shows nearly linear unlike that of static analysis in spite of its discontinuity of the short time shear modulus of PVB in a laminated glass.