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Viscoelastic Properties of Selected PVB Interlayers for Laminated Glass

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00343558" target="_blank" >RIV/68407700:21110/20:00343558 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/68407700:21610/20:00343558

  • Výsledek na webu

    <a href="https://dergipark.org.tr/tr/download/article-file/845449" target="_blank" >https://dergipark.org.tr/tr/download/article-file/845449</a>

  • DOI - Digital Object Identifier

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Viscoelastic Properties of Selected PVB Interlayers for Laminated Glass

  • Popis výsledku v původním jazyce

    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.

  • Název v anglickém jazyce

    Viscoelastic Properties of Selected PVB Interlayers for Laminated Glass

  • Popis výsledku anglicky

    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.

Klasifikace

  • Druh

    J<sub>ost</sub> - Ostatní články v recenzovaných periodicích

  • CEP obor

  • OECD FORD obor

    20501 - Materials engineering

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/FV10295" target="_blank" >FV10295: Vrstvené bezpečnostní sklo s výztuží</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2020

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Acta Materialia Turcica

  • ISSN

    2630-5909

  • e-ISSN

    2630-5909

  • Svazek periodika

    4

  • Číslo periodika v rámci svazku

    October

  • Stát vydavatele periodika

    TR - Turecká republika

  • Počet stran výsledku

    6

  • Strana od-do

    37-42

  • Kód UT WoS článku

  • EID výsledku v databázi Scopus