Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Numerical analysis and 1D/2D sensitivity study for monolithic and laminated structural glass elements under thermal exposure

Kozlowski, Marcin LU ; Bedon, Chiara and Honfi, Dániel LU (2018) In Materials 11(8).
Abstract

Glass is largely used in architectural and engineering applications (i.e., buildings and vehicles) as a structural material, especially in the form of laminated glass (LG) sections. To achieve adequate and controlled safety levels in these applications, the well-known temperature-dependent behavior of viscoelastic interlayers for LG sections should be properly accounted for during the design process. Furthermore, the materials' thermomechanical degradation with increases of temperature could severely affect the load-bearing performance of glass assemblies. In this context, uncoupled thermomechanical finite element (FE) numerical models could represent a robust tool and support for design engineers. Key input parameters and possible... (More)

Glass is largely used in architectural and engineering applications (i.e., buildings and vehicles) as a structural material, especially in the form of laminated glass (LG) sections. To achieve adequate and controlled safety levels in these applications, the well-known temperature-dependent behavior of viscoelastic interlayers for LG sections should be properly accounted for during the design process. Furthermore, the materials' thermomechanical degradation with increases of temperature could severely affect the load-bearing performance of glass assemblies. In this context, uncoupled thermomechanical finite element (FE) numerical models could represent a robust tool and support for design engineers. Key input parameters and possible limits of the FE method, however, should be properly calibrated and assessed, so as to enable reliable estimations for the real behavior of glazing systems. In this paper, FE simulations are proposed for monolithic (MG) and LG specimens under radiant heating, based on one-dimensional (1D) and two-dimensional (2D) models. A special attention is focused on thermal effects, being representative of the first step for conventional uncoupled, thermomechanical analyses. Based on experimental results available in the literature, FE parametric studies are discussed, giving evidence of limits and issues due to several modeling assumptions. In particular, careful consideration is paid for various thermal material properties (conductivity, specific heat) and thermal boundaries (conductivity, emissivity), but also for other influencing parameters like the geometrical features of samples (thickness tolerances, cross-sectional properties, etc.), the composition of LG sections (interlayer type, thickness), the loading pattern (heat transfer distribution) and the presence of additional mechanical restraints (i.e., supports of different materials). Comparative FE results are hence critically discussed, highlighting the major effects of such influencing parameters.

(Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Experiments, Finite element (FE) numerical modeling, Laminated glass, Material properties, One-dimensional (1D) models, Sensitivity study, Structural glass, Thermal loading, Thermal performance assessment, Two-dimensional (2D) models
in
Materials
volume
11
issue
8
article number
1447
publisher
MDPI AG
external identifiers
  • scopus:85051817629
  • pmid:30115824
ISSN
1996-1944
DOI
10.3390/ma11081447
language
English
LU publication?
yes
id
6766d821-5487-4d90-a12f-00b18bcbd3f1
date added to LUP
2018-09-07 12:54:37
date last changed
2021-09-29 04:00:39
@article{6766d821-5487-4d90-a12f-00b18bcbd3f1,
  abstract     = {<p>Glass is largely used in architectural and engineering applications (i.e., buildings and vehicles) as a structural material, especially in the form of laminated glass (LG) sections. To achieve adequate and controlled safety levels in these applications, the well-known temperature-dependent behavior of viscoelastic interlayers for LG sections should be properly accounted for during the design process. Furthermore, the materials' thermomechanical degradation with increases of temperature could severely affect the load-bearing performance of glass assemblies. In this context, uncoupled thermomechanical finite element (FE) numerical models could represent a robust tool and support for design engineers. Key input parameters and possible limits of the FE method, however, should be properly calibrated and assessed, so as to enable reliable estimations for the real behavior of glazing systems. In this paper, FE simulations are proposed for monolithic (MG) and LG specimens under radiant heating, based on one-dimensional (1D) and two-dimensional (2D) models. A special attention is focused on thermal effects, being representative of the first step for conventional uncoupled, thermomechanical analyses. Based on experimental results available in the literature, FE parametric studies are discussed, giving evidence of limits and issues due to several modeling assumptions. In particular, careful consideration is paid for various thermal material properties (conductivity, specific heat) and thermal boundaries (conductivity, emissivity), but also for other influencing parameters like the geometrical features of samples (thickness tolerances, cross-sectional properties, etc.), the composition of LG sections (interlayer type, thickness), the loading pattern (heat transfer distribution) and the presence of additional mechanical restraints (i.e., supports of different materials). Comparative FE results are hence critically discussed, highlighting the major effects of such influencing parameters.</p>},
  author       = {Kozlowski, Marcin and Bedon, Chiara and Honfi, Dániel},
  issn         = {1996-1944},
  language     = {eng},
  month        = {08},
  number       = {8},
  publisher    = {MDPI AG},
  series       = {Materials},
  title        = {Numerical analysis and 1D/2D sensitivity study for monolithic and laminated structural glass elements under thermal exposure},
  url          = {http://dx.doi.org/10.3390/ma11081447},
  doi          = {10.3390/ma11081447},
  volume       = {11},
  year         = {2018},
}