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Numerical representation of fracture patterns and post-fracture load-bearing performance of thermally prestressed glass with polymer foil
•A thermally prestressed glass panel with a polymer foil (backsheet) is studied.•Its post-fracture load-bearing performance (bending) is numerically assessed.•Digital image processing is used to obtain fracture patterns from experiments.•The panel is modeled by a quadtree mesh with prismatic polyhed...
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Published in: | Engineering structures 2021-01, Vol.226, p.111318, Article 111318 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •A thermally prestressed glass panel with a polymer foil (backsheet) is studied.•Its post-fracture load-bearing performance (bending) is numerically assessed.•Digital image processing is used to obtain fracture patterns from experiments.•The panel is modeled by a quadtree mesh with prismatic polyhedral finite elements.•Cohesive elements represent the structural effect of the polymer foil.
Glass can be thermally prestressed to enhance its load-bearing performance and tensile strength for civil engineering constructions. In such applications, the glass is thermally treated (internal stress state) and polymer foils/interlayers are applied to generate a laminate with a higher resistance to bending (out-of-plane loading) in case of fracture. In this contribution, a thermally prestressed glass panel with polymer foil as a backsheet is investigated as a special configuration of safety glass. In its post-fracture state, the polymer foil still provides a minimum structural integrity. Commonly, the post-fracture load-bearing performance of such polymer-glass assemblies is experimentally assessed by large scale tests related to high costs and testing time. In this research, an approach is presented to numerically assess the post-fracture load-bearing performance (bending) of such a fractured glass panel. The approach is based on A) digital image processing of the fracture pattern of three glass samples, B) the generation of a quadtree finite element (FE) mesh, C) the use of prismatic polyhedral FE to efficiently represent glass fragments in the quadtree FE mesh and D) cohesive elements with a nonlinear traction-separation law (TSL) for finite separation to represent the structural effect of the polymer foil during the post-fracture state. |
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ISSN: | 0141-0296 1873-7323 |
DOI: | 10.1016/j.engstruct.2020.111318 |