Damageability Assessment of Impact-Resistant Glass for Transparent Armor Systems

Currently, much effort is being devoted to developing experimental research methods to determine damage and fracture resistance of brittle materials under local contact load conditions using various indenters and punches. The paper offers an experimental approach for studying the damageability and residual impact resistance of structural elements made of laminated bullet-resistant glass with ballistic damage. The glass is considered as a laminated plate. The approach takes into account the influence of the location of the punch indentation zones relative to the epicenters of ballistic impacts, the network of branched surface and subsurface cracks with glass chips, as well as the influence of the glass edges on the destructive load. Damage to laminated impact-resistant plates was assessed during ballistic tests under conditions close to full-scale ones. The practical significance of the proposed approach lies in the possibility of its use for assessing the damageability and service life of the aircraft laminated impact-resistant glazing with ballistic damage for the period of repair, restoration and modernization of transparent armor systems.