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VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS

Year 2020, Volume: 4 Issue: 4, 37 - 42, 23.10.2020

Abstract



In contemporary
architecture, laminated glass panes are widely used for structural elements loaded
perpendicularly to its surface such as floors, roofing, facades etc. It is
sought-after for its transparency and smooth reflective surface. In this case,
it is advisable to consider the interaction of the individual glass panes in
the cross-section. A conservative approach, that does not take into account the
shear interaction of glass panes, is uneconomical. Various commercial products
based on PVB (polyvinyl butyral), EVA (ethylene vinyl acetate), ionomer, or
thermoplastic polyurethane (TPU) are used. Stiffness of polymers depends on
temperature and duration of a load. Interlayers exhibit the viscoelastic
properties and temperature dependency is usually described by the generalized
Maxwell model and WLF model (Williams-Landel-Ferry). Parameters of these models
are most effectively determined by Dynamic Mechanical Thermal Analysis (DMTA),
where the material is cyclically loaded at different frequencies and
temperatures. Two types of PVB interlayers (Trosifol
® Extra
Strong and Trosifol
® BG-R-20) were investigated using DMTA in the
research carried out at Klokner Institute, CTU in Prague. In addition,
experimental quasi-static loading tests were performed in shear at various loading
rates and temperatures. The testing arrangement was as single lap shear test in
both cases. The experimental stress-strain diagrams from static tests were
compared with the theoretical diagrams derived from material parameters based
on DMTA testing. Although both materials are PVB-based, shear stiffness and
temperature dependence are considerably different due to additives added to the
PVB feedstock. These differences in material behavior are important because the
actual material properties have to be taken into account in the design of laminated
glass structure.

Supporting Institution

MPO ČR

Project Number

FV10295

Thanks

This contribution was prepared with support of the project MPO ČR No. FV10295.

References

  • [1] Serafinavičius, T., Lebet, J., Louter, Ch., Lenkimas, T. and Kuranovas, A.: Long-term laminated glass four point bending test with PVB, EVA and SG interlayers at different temperatures. Procedia Engineering 57 (2013). doi: 10.1016/j.proeng.2013.04.126
  • [2] Serafinavičius, T., Kvedaras, A., Sauciuvenas, G.: Bending behavior of structural glass laminated with different interlayers. Mechanics of Composite Materials, 437-446 (2013)
  • [3] Vokáč, M.; Hána, T.; Vokáč Machalická, K.; Eliášová, M. Viscoelastic Properties of PVB Interlayer for Laminated Glass Structures Used in Building Reconstructions. Key Engineering Materials. 2019, 808 115-122. ISSN 1662-9795.
  • [4] Ferry, J.D.: Viscoelastic properties of polymers; 3rd ed.; New York: Wiley, 1980; ISBN 978-0-471-04894-7
  • [5] Lakes, R.: Viscoelastic Materials; Cambridge: Cambridge University Press, 2009; ISBN 978-0-521-88568-3
  • [6] Williams, M.L.; Landel, R.F.; Ferry, J.D.: The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-forming Liquids; Journal of the American Chemical Society; Vol. 77, 3701-3707 (1955)
  • [7] Kuntsche, Johannes K.: Mechanisches Verhalten von Verbundglas unter zeitabhängiger Belastung und Explosionsbeanspruchung (2015)
Year 2020, Volume: 4 Issue: 4, 37 - 42, 23.10.2020

Abstract

Project Number

FV10295

References

  • [1] Serafinavičius, T., Lebet, J., Louter, Ch., Lenkimas, T. and Kuranovas, A.: Long-term laminated glass four point bending test with PVB, EVA and SG interlayers at different temperatures. Procedia Engineering 57 (2013). doi: 10.1016/j.proeng.2013.04.126
  • [2] Serafinavičius, T., Kvedaras, A., Sauciuvenas, G.: Bending behavior of structural glass laminated with different interlayers. Mechanics of Composite Materials, 437-446 (2013)
  • [3] Vokáč, M.; Hána, T.; Vokáč Machalická, K.; Eliášová, M. Viscoelastic Properties of PVB Interlayer for Laminated Glass Structures Used in Building Reconstructions. Key Engineering Materials. 2019, 808 115-122. ISSN 1662-9795.
  • [4] Ferry, J.D.: Viscoelastic properties of polymers; 3rd ed.; New York: Wiley, 1980; ISBN 978-0-471-04894-7
  • [5] Lakes, R.: Viscoelastic Materials; Cambridge: Cambridge University Press, 2009; ISBN 978-0-521-88568-3
  • [6] Williams, M.L.; Landel, R.F.; Ferry, J.D.: The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-forming Liquids; Journal of the American Chemical Society; Vol. 77, 3701-3707 (1955)
  • [7] Kuntsche, Johannes K.: Mechanisches Verhalten von Verbundglas unter zeitabhängiger Belastung und Explosionsbeanspruchung (2015)
There are 7 citations in total.

Details

Primary Language English
Subjects Mechanical Engineering
Journal Section Research Articles
Authors

Miroslav Vokáč 0000-0001-8233-6373

Tomáš Hána This is me

Klára V. Machalická This is me 0000-0002-1235-9606

Martina Eliášová This is me 0000-0002-3947-5754

Project Number FV10295
Publication Date October 23, 2020
Published in Issue Year 2020 Volume: 4 Issue: 4

Cite

APA Vokáč, M., Hána, T., V. Machalická, K., Eliášová, M. (2020). VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS. Acta Materialia Turcica, 4(4), 37-42.
AMA Vokáč M, Hána T, V. Machalická K, Eliášová M. VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS. ACTAMAT. October 2020;4(4):37-42.
Chicago Vokáč, Miroslav, Tomáš Hána, Klára V. Machalická, and Martina Eliášová. “VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS”. Acta Materialia Turcica 4, no. 4 (October 2020): 37-42.
EndNote Vokáč M, Hána T, V. Machalická K, Eliášová M (October 1, 2020) VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS. Acta Materialia Turcica 4 4 37–42.
IEEE M. Vokáč, T. Hána, K. V. Machalická, and M. Eliášová, “VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS”, ACTAMAT, vol. 4, no. 4, pp. 37–42, 2020.
ISNAD Vokáč, Miroslav et al. “VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS”. Acta Materialia Turcica 4/4 (October 2020), 37-42.
JAMA Vokáč M, Hána T, V. Machalická K, Eliášová M. VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS. ACTAMAT. 2020;4:37–42.
MLA Vokáč, Miroslav et al. “VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS”. Acta Materialia Turcica, vol. 4, no. 4, 2020, pp. 37-42.
Vancouver Vokáč M, Hána T, V. Machalická K, Eliášová M. VISCOELASTIC PROPERTIES OF SELECTED PVB INTERLAYERS FOR LAMINATED GLASS. ACTAMAT. 2020;4(4):37-42.