Experimental Study on Different Interlayer Materials for Laminated Glass

Bernhard Weller, Jan Wuensch & Kristina Haerth, Technische Universität Dresden, Institute of Building Construction

The influence of interlayer on the stiffness and thus on the load-bearing capacity of laminated glass is well known. Most of the published investigations are about the standard application of laminated safety glass with interlayer of polyvinyl butyral films (PVB). Among PVB, the investigations presented in this paper deal with interlayer consisting of ethylene vinyl acetate (EVA).

All investigated materials (PVB film, EVA film) are polymers with distinct viscous-elastic behaviour. This material behaviour is characterized by dependence on temperature, time, kind and height of the load. Furthermore, these materials do not spontaneously react on loads but with some time delay. At partly crystalline thermoplastics (e. g. PVB), nonlinear (irreversible) distortions can occur. The occurrence depends considerably on the height of the load.

The experimental study shows the results of comparative shear tests at laminated glass samples with the interlayer materials mentioned above. The shear tests were executed at small cylindrical samples, which were produced by core drilling. The load-bearing capacity of laminated glass was investigated at different temperature and different load-duration.

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The Authors

Prof. Dr. Bernhard Weller Technische Universität Dresden, Institute of Building Construction Bernhard Weller is Professor of Civil Engineering at the Technische Universitaet Dresden and Director of the Institute of Building Construction. He has expertise in design, testing and use of glass. T... Read more