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The Fracture Process of Tempered Soda-Lime-Silica Glass

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Abstract

This work presents experimental observations of the characteristic fracture process of tempered glass. Square specimens with a side length of 300 mm, various thicknesses and a residual stress state characterized by photoelastic measurements were used. Fracture was initiated using a 2.5 mm diamond drill and the fragmentation process was captured using High-Speed digital cameras. From the images, the average speed of the fracture front propagation was determined within an accuracy of 1.0%. Two characteristic fragments were found to form on each side of the initiation point and are named “Whirl-fragments” referring to the way they are generated. An earlier estimation of the in-plane shape of the fracture front is corrected and a hypothesis on the development for the fracture front is offered. The hypothesis is supported by investigations of the fragments using a Scanning Electron Microscope (SEM) which also revealed a micro scale crack bridging effect.

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Acknowledgements

The authors would like to thank Mads Bonde at ScanGlas (DK) for providing the glass specimens, The Villum Kann Rasmussen foundation for sponsoring the digital high-speed cameras, and Ebba Cederberg Schnell at DTU Byg for assisting with the SEM images.

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Authors and Affiliations

  1. Department of Civil Engineering, Technical University of Denmark, Brovej building 118, 2800 Kgs., Lyngby, Denmark

    J. H. Nielsen, J. F. Olesen & H. Stang

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  1. J. H. Nielsen
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  2. J. F. Olesen
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  3. H. Stang
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Correspondence to J. H. Nielsen.

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Nielsen, J.H., Olesen, J.F. & Stang, H. The Fracture Process of Tempered Soda-Lime-Silica Glass. Exp Mech 49, 855–870 (2009). https://doi.org/10.1007/s11340-008-9200-y

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  • DOI: https://doi.org/10.1007/s11340-008-9200-y

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