Characterization of the Residual Stress State in Commercially Fully Toughened Glass
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 2
Abstract
Toughened glass is often used in load carrying elements due to the relatively high tensile strength compared with float glass. The apparent tensile strength of toughened glass is a combination of the pure material strength and the residual stresses imposed by the toughening process. This paper is concerned with an experimental characterization of the residual stress state for toughened glass. Results for the variation of residual stresses within 32 square specimens with a side length of 300 mm are investigated. The specimens varied in thickness and one group was glass with low iron content. The photoelastic constant was estimated from a four-point bending test. The experimental results revealed large variations in the residual stress state within each specimen and between groups of different thicknesses. The results are compared with a nonstandard fragmentation test, showing that the fragment size does not seem to be dependent on the local variations of the residual stress state in a specimen.
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Acknowledgments
The writers would like to thank the COWI foundation and the Toubro Foundation for sponsoring the photoelastic measuring device.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 2 • February 2010
Pages: 179 - 185
Copyright
© 2010 ASCE.
History
Received: Mar 28, 2008
Accepted: Sep 25, 2009
Published online: Jan 15, 2010
Published in print: Feb 2010
Notes
Note. Associate Editor: Kolluru V. Subramanian
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