Viscoelastic characterization of seven laminated glass interlayer materials from static tests

Centelles, Xavier; Pelayo, F.; Lamela-Rey, María Jesús; Fernández, A. Inés; Salgado-Pizarro, Rebeca; Castro, J. Ramon; Cabeza, Luisa F.

doi:10.1016/j.conbuildmat.2021.122503

Cited by 22 publications

(9 citation statements)

References 29 publications

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“…To determine the mechanical properties of viscoelastic materials [ 22 ], it is necessary to combine elastic behavior governed by Hooke’s law and viscous behavior governed by Newton’s law [ 23 ]. During the static test, two approaches are carried out: creep test and stress relaxation test ( Figure 2 ).…”

Section: Methodsmentioning

confidence: 99%

“… Stress and strain diagrams of viscoelastic material: ( a ) when constant stress is applied; ( b ) constant strain is applied. Adapted from [ 23 ], Elsevier, 2021. …”

Section: Figurementioning

confidence: 99%

“… Temporal offset of stress and strain diagram of a viscoelastic material under dynamic load. Adapted from [ 23 ], Elsevier, 2021. …”

Section: Figurementioning

confidence: 99%

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Influence of PVB Interlayer Mechanical Properties on Laminated Glass Elements Design in Dependence of Real Time-Temperature Changes

et al. 2022

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Most used laminated glass is composed of float glass plies bonded together with a viscoelastic Polyvinyl Butyral (PVB) interlayer. The shear stiffness of the polymeric interlayer is the key factor in the behavior of laminated glass. Structural engineers in the past were designing laminated glass regardless of the shear coupling of the plies. This approach with a high level of reliability led to expensive laminated glass structures due to insufficient knowledge of foil properties. Most of the current standards suggest methods that consider the shear coupling of the plies. This paper presents the experimental data from a static loading test performed on a laminated glass panel exposed to changing temperatures. The deformations were observed for 48 h. The measured results were compared with the known analytical design approaches and in addition with the finite element modeling (FEM) analysis in the available software for laminated glass design. A simplified design approach that simulates foil behavior in dependence on load duration and temperature change was adopted in this study. Design approaches that use effective thickness calculations are used with the Young and shear relaxation modulus provided by the foil producer. The imprecision of the Eurocode standards for glass design, and the propensity to change the approach to the calculation by introducing more precise parameters were expounded. The results when combining the time-temperature superposition (TTS) and the Wölfel–Bennison approach were found to be in very good agreement with the FEM analysis of 3D solid elements in Abaqus and measured data.

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Section: Methodsmentioning

confidence: 99%

“… Stress and strain diagrams of viscoelastic material: ( a ) when constant stress is applied; ( b ) constant strain is applied. Adapted from [ 23 ], Elsevier, 2021. …”

Section: Figurementioning

confidence: 99%

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Influence of PVB Interlayer Mechanical Properties on Laminated Glass Elements Design in Dependence of Real Time-Temperature Changes

et al. 2022

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“…Polymeric materials are widely used in engineering applications and many studies on their mechanical behaviour are available [1][2][3]. The characterisation of polymeric materials is a recurrent topic of research, and many contributions are being developed continuously [4][5][6]. Determining the damping of a polymeric material is of special importance for applications aimed at reducing vibrations.…”

Section: Introductionmentioning

confidence: 99%

A Robust Technique for Polymer Damping Identification Using Experimental Transmissibility Data

et al. 2022

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This paper presents a robust method to estimate polymers’ damping, based on modal identification methods on frequency functions. The proposed method presents great advantages compared to other traditional methods such as the HPB method for polymeric materials where high damping or noise levels can limit their use. Specifically, this new method is applied on an experimental transmissibility function measured in a composite cantilever beam and the complex modulus is determined as a function of frequency. From this, a regenerated function is obtained based on the Euler–Bernoulli beam theory, and it is compared with experimental data. It can be concluded that the best way to apply the curve-fitting method for further testing of polymeric materials is when it is used with the whole frequency range by means of the MDOF method considering the residuals. In addition, this has the added advantage that the number of experimental tests to be carried out is much lower compared to using the SDOF method.

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“…Therefore, structural laminated glass (LG) products, which comprise more than two glass plies and one polymeric interlayers to achieve better post-fracture performance, have been increasingly used in glass buildings [3]. The most commonly used polymeric interlayers in glass buildings are Polyvinyl Butyral (PVB) [4] and ionoplast interlayers [5]. The impact resistance is one essential factor in the design of glass structures, as glass materials (even thermally toughened glass) present high vulnerability under impacts [6,7].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear analytical study of structural laminated glass under hard body impact in the pre-crack stage

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Wang

Yang

et al. 2021

Thin-Walled Structures

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Viscoelastic characterization of seven laminated glass interlayer materials from static tests

Cited by 22 publications

References 29 publications

Influence of PVB Interlayer Mechanical Properties on Laminated Glass Elements Design in Dependence of Real Time-Temperature Changes

Influence of PVB Interlayer Mechanical Properties on Laminated Glass Elements Design in Dependence of Real Time-Temperature Changes

A Robust Technique for Polymer Damping Identification Using Experimental Transmissibility Data

Nonlinear analytical study of structural laminated glass under hard body impact in the pre-crack stage

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