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Laminated glass behaviour under perforating impact

Emmanuel Nourry 
Abstract : Laminated glass, as used in building applications (protection for shops and commercial building, guarding and balustrading...), is essentially designed for the protection against accidental shocks, against the risk of injury and against intruders and vandalism. Shock and penetration resistance, residual strength, reduction of fragments projection and laceration risk are evaluated by standard tests. This work is a contribution to the experimental investigation of the impact behaviour until perforation of laminated glass. From an experimental study of the hard body impact, the chronology and phenomenology of the damage evolution were identified and made it possible to define the energy balance of the impact. Then, the mechanical phenomena responsible for input energy dissipation (fragmentation, projection of fragments, interlayer deformation and glass/polymer debonding) were described and quantified. This investigation showed, for the impacts categories used, the preponderance of the interlayer deformation for energy dissipation and the necessity to consider jointly this mechanism with the adhesion conditions. Finally, with an original interrupted impact facility which discretizes damage evolution, the glazing ability to degrade impact energy was evaluated, versus time. The principle of this device is to vary the perforation distance of the projectile for the same input energy. Instrumentation of the latter gives us displacement evolution during the impact. Thus, the damage evolution can be described and compared with the energy dissipation in order to characterize the impact resistance of laminated glass.
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Submitted on : Tuesday, February 21, 2006 - 8:00:00 AM
Last modification on : Tuesday, February 21, 2006 - 8:00:00 AM
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  • HAL Id : pastel-00001608, version 1



Emmanuel Nourry. Laminated glass behaviour under perforating impact. Engineering Sciences [physics]. Arts et Métiers ParisTech, 2005. English. ⟨NNT : 2005ENAM0003⟩. ⟨pastel-00001608⟩



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