The Effects of Cold Warping on Glass Stiffness

Significant progress has been made during the past two decades to advance the use of cold warped glazing (glass that has been elastically twisted out of plane) to achieve architectural vision. As with most new technologies, a full understanding of the mechanics of elastic cold warping has lagged i...

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Autor principal:	Austin Bensend
Formato:	article
Lenguaje:	EN
Publicado:	Challenging Glass Conference 2018
Materias:	Cold Warped Glass Deflection Stiffness Clay industries. Ceramics. Glass TP785-869
Acceso en línea:	https://doaj.org/article/31bef9a0d0344c87bc3a3ebfb3bc6361
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spelling	oai:doaj.org-article:31bef9a0d0344c87bc3a3ebfb3bc63612021-12-04T05:12:22ZThe Effects of Cold Warping on Glass Stiffness10.7480/cgc.6.21192589-8019https://doaj.org/article/31bef9a0d0344c87bc3a3ebfb3bc63612018-05-01T00:00:00Zhttps://proceedings.challengingglass.com/index.php/cgc/article/view/95https://doaj.org/toc/2589-8019 Significant progress has been made during the past two decades to advance the use of cold warped glazing (glass that has been elastically twisted out of plane) to achieve architectural vision. As with most new technologies, a full understanding of the mechanics of elastic cold warping has lagged its adoption and increasing specification for use in new construction. As a contractor whose aim is to turn vision into reality, Enclos has been invested in research and development related to the structural and performance implications of cold warped glazing. One of the most recent discoveries from this work at Enclos has been to relate cold warping of glass to its effect on plate stiffness. In particular, transverse stiffness to resist load may be negatively affected by the operation of cold warping glass supported by a perimeter frame. This loss in stiffness has been observed in cold warped glass when compared to flat glass of equal size and thickness. Recent work at Enclos indicates deflection due to transverse load increases with an increasing degree of warping. This phenomenon is especially pronounced for thin plates that resist load through significant large-deformation, non-linear plate behavior. As the degree of warp increases, the loss of stiffness becomes increasingly apparent, to the point at which the glass buckles. As a result of the warping operation, compressive membrane stresses are generated in the center region of the glass. These compressive stresses counteract the tension that normally arises during large-deformation plate behavior and that contributes to its deflection performance. As such, a membrane compression due to warping leads to the loss in stiffness when membrane effects appreciably contribute to overall bending stiffness (as they do in plates that fall within the large-deflection regime of bending). An exploration of this phenomena using a series of finite element tests, coupled with observations from previous testing are the basis for these findings. Austin BensendChallenging Glass ConferencearticleCold Warped GlassDeflectionStiffnessClay industries. Ceramics. GlassTP785-869ENChallenging Glass Conference Proceedings, Vol 6, Iss 1 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cold Warped Glass Deflection Stiffness Clay industries. Ceramics. Glass TP785-869
spellingShingle	Cold Warped Glass Deflection Stiffness Clay industries. Ceramics. Glass TP785-869 Austin Bensend The Effects of Cold Warping on Glass Stiffness
description	Significant progress has been made during the past two decades to advance the use of cold warped glazing (glass that has been elastically twisted out of plane) to achieve architectural vision. As with most new technologies, a full understanding of the mechanics of elastic cold warping has lagged its adoption and increasing specification for use in new construction. As a contractor whose aim is to turn vision into reality, Enclos has been invested in research and development related to the structural and performance implications of cold warped glazing. One of the most recent discoveries from this work at Enclos has been to relate cold warping of glass to its effect on plate stiffness. In particular, transverse stiffness to resist load may be negatively affected by the operation of cold warping glass supported by a perimeter frame. This loss in stiffness has been observed in cold warped glass when compared to flat glass of equal size and thickness. Recent work at Enclos indicates deflection due to transverse load increases with an increasing degree of warping. This phenomenon is especially pronounced for thin plates that resist load through significant large-deformation, non-linear plate behavior. As the degree of warp increases, the loss of stiffness becomes increasingly apparent, to the point at which the glass buckles. As a result of the warping operation, compressive membrane stresses are generated in the center region of the glass. These compressive stresses counteract the tension that normally arises during large-deformation plate behavior and that contributes to its deflection performance. As such, a membrane compression due to warping leads to the loss in stiffness when membrane effects appreciably contribute to overall bending stiffness (as they do in plates that fall within the large-deflection regime of bending). An exploration of this phenomena using a series of finite element tests, coupled with observations from previous testing are the basis for these findings.
format	article
author	Austin Bensend
author_facet	Austin Bensend
author_sort	Austin Bensend
title	The Effects of Cold Warping on Glass Stiffness
title_short	The Effects of Cold Warping on Glass Stiffness
title_full	The Effects of Cold Warping on Glass Stiffness
title_fullStr	The Effects of Cold Warping on Glass Stiffness
title_full_unstemmed	The Effects of Cold Warping on Glass Stiffness
title_sort	effects of cold warping on glass stiffness
publisher	Challenging Glass Conference
publishDate	2018
url	https://doaj.org/article/31bef9a0d0344c87bc3a3ebfb3bc6361
work_keys_str_mv	AT austinbensend theeffectsofcoldwarpingonglassstiffness AT austinbensend effectsofcoldwarpingonglassstiffness
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The Effects of Cold Warping on Glass Stiffness

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