Everyday engineering practice in the area of structural glass design is facing some limitations regarding the optimisation of selected glass structures. Since laminated glass is a composite of brittle glass and polymeric interlayer, the behaviour of different types of interlayer, bond between them needs to be investigated. Modelling laminated glass is complex because of the linear elastic material behaviour of the glass in combination with the highly non-linear interlayer which is also a timetemperature-dependent polymer. In this work, numerical analyses of laminated glass panels exposed to four-point bending are performed to observe and compare the stresses and displacements caused by different parameters, such as temperature, load duration, the thickness and type of the interlayers, as well as the symmetrical and nonsymmetrical disposition of the glass plates’ thickness. A parametric study on these influences was performed. To obtain the relationship between the load duration, temperature, and thickness of the interlayer compared to the maximal displacement (as a measure of flexural stiffness) and tension stress in the bottom glass plate, an analytical polynomial of a sixth total order is proposed. Isosurfaces are created, showing the dependence of stresses and displacements on the specified parameters as well as clearly showing differences in the behavior of laminated glass panels for the same conditions but with different interlayers such as ethylene vinyl acetate (EVA), polyvinyl butyral (PVB) and Ionoplast. Based on the findings of the parametric study, conclusions are derived about the flexural stiffness and stress distribution in two-plate laminated glass with EVA, PVB and Ionoplast.
Milica Slipcevic
Numerical study of laminated glass with PVB, EVA and Ionoplast exposed to out-of-plane bending under the influence of different parameters
Company: University of the Bundeswehr, Germany
About the speaker:
Mr.Sc. Milica Slipcevic is a research assistant at the University of the Bundeswehr Munich, focusing on laminated glass and its structural applications, particularly with varying interlayers. Alongside academic research, she works as a structural engineer in an engineering office, applying practical design solutions in glass construction. Her dual role bridges research and practice, aligning well with GPD 2025’s emphasis on the visible and invisible impacts of glass.