A Weibull model for bending failure prediction of polyurea laminated glass under coaxial double-ring test

Abstract

This paper studies the bending capacity of polyurea laminated glass (PLG). The focus of study is to study the influence of sandwich thickness, thickness of two tempered glass plates and loading rate on bending ability. The results were compared with the widely used interlayer models of PVB (Polyvinyl Butyric), SG (SentryGlas®), and EVA (Ethylene Vinyl Acetate). The coaxial double ring (CDR) test was carried out on multiple groups of specimens with different specimen size parameters. The mechanical properties of PLG showed in results are close to the laminated glass which interlayer material is SG, much higher than the laminated glass which interlayer material is PVB or EVA. In addition, an improved method of calculating hw and hσ,i for laminated glass was constructed for CDR testing. A two-parameter Weibull distribution model was used to predict the ultimate load of specimens with a given probability of failure. The results of this study concludes by introducing a novel interlayer material for laminated glass, which effectively fulfills the requirements of safety glass and prevents fragments from falling off or splashing upon destruction. This study can be used as the mechanical basis for it to meet the requirements of building safety glass. And it can promote the application and development of this novel interlayer material.