The damage threshold of laminated glass structures

P. V. Grant, W. J. Cantwell, H. McKenzie, P. Corkhill

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


The effect of varying the thickness of the individual glass layers on the impact resistance of a range of laminated glass constructions has been examined. Chippings, similar to those used in traditional road construction, have been accelerated to velocities in excess of 20 m/s using a purpose-built catapult system. Tests have been conducted at both normal and 45° angles to the surface of the glass laminate and the critical velocity for damage initiation, Vcrit, determined. The results of this low velocity study indicate that the thickness of the outer glass is the primary parameter in determining Vcrit, whereas the inner thickness has a secondary influence on this threshold. Off-axis impact testing has shown that it is the normal component of the impact velocity that determines the damage threshold. A detailed optical inspection of the failed laminates highlighted a change in fracture mode from flexure-induced star cracking to top surface cone cracking as the overall laminate thickness is increased.

Original languageBritish English
Pages (from-to)737-746
Number of pages10
JournalInternational Journal of Impact Engineering
Issue number9
StatePublished - Oct 1998


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