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Dynamic crack-interface interactions in SGP laminated glass: An experimental investigation

Xu, C; Yuan, Y; Zhao, C; Tan, PJ; Xu, X; Li, Y; (2018) Dynamic crack-interface interactions in SGP laminated glass: An experimental investigation. Mechanics of Materials , 122 pp. 76-84. 10.1016/j.mechmat.2018.04.006. Green open access

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Abstract

The damage mode (crack arrest or bifurcation) that develops in SentryGlas® Plus (SGP) laminated glass under dynamic impact loading is investigated experimentally in this paper. An optical caustic method is employed – which allows simultaneous measurements of the spatial and temporal evolution of crack paths and the dynamic stress intensity factor at the crack tip(s) – to elucidate the effects of interface location and impact kinetic energy upon the fracture morphology, crack propagation velocity and the dynamic stress intensity factor in SENB (single-edge notch bend) test specimens loaded in three-point bending by a drop-weight impact system. Results reveal that there is a critical distance, between the interface and pre-crack tip, below which the propagating mode-I crack is arrested by the interface; otherwise, bifurcated mixed-mode cracks will always appear in the impacted glass layer. A maximum dynamic stress intensity factor criterion is shown to be capable of predicting whether bifurcated mixed-mode cracks would appear in the aforesaid.

Type: Article
Title: Dynamic crack-interface interactions in SGP laminated glass: An experimental investigation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.mechmat.2018.04.006
Publisher version: https://doi.org/10.1016/j.mechmat.2018.04.006
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Dynamic fracture, Crack-interface interaction, Optical caustic method, Laminated glass, Dynamic stress intensity factor
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10046176
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