Laminated glass, a composite made by bonding glass plies with polymeric interlayers, can maintain a significant load bearing capacity even when glass is broken, because of the adhesion of the glass shards to the interlayer. The post-breakage response is strongly associated with the safety performance, but it is not as well studied as the pre-glass breakage stage. Here, the tension stiffening of the interlayer due to the adhesive contact with the shards is considered as a stress perturbation, determined though a variational approach by minimizing the complementary energy functional. This allows to reach a simple but accurate estimate of the effective stiffness of the cracked laminate, which results to be strongly dependent, besides the interlayer elastic properties, upon the fragment size and the glass-to-polymer adhesion. An energetic competition à la Griffith determines the expected load vs. displacement response in a tensile test. Comparisons with numerical experiments confirm the good accuracy of the proposed approach.

A homogenized model for the post-breakage tensile behavior of laminated glass / Galuppi, Laura; ROYER CARFAGNI, Gianni. - In: COMPOSITE STRUCTURES. - ISSN 0263-8223. - 154:(2016), pp. 600-615. [10.1016/j.compstruct.2016.07.052]

A homogenized model for the post-breakage tensile behavior of laminated glass

GALUPPI, Laura;ROYER CARFAGNI, Gianni
2016-01-01

Abstract

Laminated glass, a composite made by bonding glass plies with polymeric interlayers, can maintain a significant load bearing capacity even when glass is broken, because of the adhesion of the glass shards to the interlayer. The post-breakage response is strongly associated with the safety performance, but it is not as well studied as the pre-glass breakage stage. Here, the tension stiffening of the interlayer due to the adhesive contact with the shards is considered as a stress perturbation, determined though a variational approach by minimizing the complementary energy functional. This allows to reach a simple but accurate estimate of the effective stiffness of the cracked laminate, which results to be strongly dependent, besides the interlayer elastic properties, upon the fragment size and the glass-to-polymer adhesion. An energetic competition à la Griffith determines the expected load vs. displacement response in a tensile test. Comparisons with numerical experiments confirm the good accuracy of the proposed approach.
2016
A homogenized model for the post-breakage tensile behavior of laminated glass / Galuppi, Laura; ROYER CARFAGNI, Gianni. - In: COMPOSITE STRUCTURES. - ISSN 0263-8223. - 154:(2016), pp. 600-615. [10.1016/j.compstruct.2016.07.052]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2812186
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