The paper presents the results of an experimental research on the viscoelastic behavior of laminated glasses with polyvinyl-butyral interlayers. The problem is investigated with double lap joints under compressive loadings over a temperature range between 20 C and 50 C. The viscoelastic mechanical parameters of polyvinyl-butyral play a fundamental role in determining the response of laminated glass and consequently, their knowledge is required for a reliable design, especially in structural application, such as beams, plates, fins, columns, walls, façade and roofs. Tests were performed on specimens made of three glass plies under long-term loads in different conditions of temperature and relative humidity. Shear stresses and relative displacements among the glass-interlayer interfaces were measured. The response is presented and discussed. To obtain a long term creep model using time???temperature superposition, an eight terms Prony series and the shift factors obtained from the Williams, Landel and Ferry equation were considered.

Long term response of glass-PVB double-lap joints

BIOLZI, LUIGI;ROSATI, GIANPAOLO
2014

Abstract

The paper presents the results of an experimental research on the viscoelastic behavior of laminated glasses with polyvinyl-butyral interlayers. The problem is investigated with double lap joints under compressive loadings over a temperature range between 20 C and 50 C. The viscoelastic mechanical parameters of polyvinyl-butyral play a fundamental role in determining the response of laminated glass and consequently, their knowledge is required for a reliable design, especially in structural application, such as beams, plates, fins, columns, walls, façade and roofs. Tests were performed on specimens made of three glass plies under long-term loads in different conditions of temperature and relative humidity. Shear stresses and relative displacements among the glass-interlayer interfaces were measured. The response is presented and discussed. To obtain a long term creep model using time???temperature superposition, an eight terms Prony series and the shift factors obtained from the Williams, Landel and Ferry equation were considered.
laminates; glasses; creep; mechanical properties
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/801322
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