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Impact damage in layered glass

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Abstract

High-velocity impact onto a layered glass target produces a very extensive damage pattern exhibiting many distinct morphologies. Material around the penetration cavity is finely comminuted. Under the arrested projectile, the glass is largely intact with spoke-like fracture regions. Around the projectile cavity, needle fragments are formed; they are radial in outer layers and circumferential in inner layers. Extensive radial cracks occur in all layers, but the spacing and frequency of transverse fractures change in each layer. Damage from radial cracks also progresses from being hoop-stress-induced to flexural-induced through the depth of the target. Fan and dicing cracks occur near the periphery of the target. Mesoscale damage features include conventional mist and hackle markings indicating very fast cracks. The map of damage presented herein should be a valuable reference for attempts to model impact damage of glass.

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Authors and Affiliations

  1. Institute for Advanced Technology, The University of Texas at Austin, 3925 West Braker Lane, Suite 400, Austin, TX, 78759, USA

    Stephan Bless & Tiffany Chen

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  1. Stephan Bless
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  2. Tiffany Chen
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Correspondence to Stephan Bless.

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Bless, S., Chen, T. Impact damage in layered glass. Int J Fract 162, 151–158 (2010). https://doi.org/10.1007/s10704-009-9379-7

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  • DOI: https://doi.org/10.1007/s10704-009-9379-7

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