Long-term Laminated Glass Four Point Bending Test with PVB, EVA and SG Interlayers at Different Temperatures

Serafinavičius, Tomas; Lebet, Jean‐Paul; Louter, Christian; Lenkimas, Tomas; Kuranovas, Artiomas

doi:10.1016/j.proeng.2013.04.126

Cited by 63 publications

(54 citation statements)

References 2 publications

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“…The elastic constants of glass, the Young modulus E (1) = E (2) = 72 GPa and the Poisson ratio ν Table 3, the parameters of the Williams-Landel-Ferry (WLF) equation (8) were set to C 1 = 12.6, C 2 = 74.46, and T 0 = 20 • C. The corresponding shear relaxation functions G (2) are plotted in Figure 2(b). According to the adopted constitutive assumption, we further set the bulk modulus K (2) = 2 GPa, e.g.…”

Section: Methodsmentioning

confidence: 99%

“…. , P ; (23) 2 For three-layered units (glass/foil/glass) we set the value of the shear-effective area to A (i) s = 5/6A (i) for glass layers with i = 1, 3 and A (2) s = A (2) for the foil. For these values, which correspond to a quadratic shear stress variation in glass and to constant shear in the interlayer, e.g.…”

Section: Incremental Formulation For Constant Bulk Modulusmentioning

confidence: 99%

“…Note that the admissible generalized displacements u must satisfy the inter-layer continuity conditions (2) or (5), written compactly as…”

Section: Variational Settingmentioning

confidence: 99%

“…Note that Eq. (A.1) in fact holds only for i = 1, 3, the matrix f (2) int,e related to the interlayer must be obtained with effective values of the Young and shear moduli, E (2) and G (2) , introduced in Section 2.2. In order to derive the expression for the additional contribution to the nodal force matrix ∆ f…”

Section: A1 Von Kármán Beamsmentioning

confidence: 99%

“…(37)]. Therefore, we provide here only the history-dependent contribution: ∆ f (2) int,e,1 = −δN (2) x,e (t n ) cos β (2) e − δV (2) z,e (t n ) sin β (2) e , ∆ f…”

Section: A2 Reissner Beamsmentioning

confidence: 99%

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Comparison of viscoelastic finite element models for laminated glass beams

Zemanová

Zeman

Šejnoha

2017

International Journal of Mechanical Sciences

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Laminated glass elements, which consist of stiff elastic glass layers connected with a compliant viscoelastic polymer foil, exhibit geometrically non-linear and time/temperature-sensitive behavior. In computational modeling, the viscoelastic effects are often neglected or a detailed continuum formulation typically based on the volumetric-deviatoric elastic-viscoelastic split is used for the interlayer. Four layerwise beam theories are introduced in this paper, which differ in the non-linear beam formulation at the layer level (von Kármán/Reissner) and in constitutive assumptions for the interlayer (a viscoelastic solid with the time-independent bulk modulus/Poisson ratio). We perform detailed verification and validation studies at different temperatures and compare the accuracy of the selected formulation with simplified elastic solutions used in practice. We show that all the four formulations predict very similar responses. Therefore, our suggestion is to use the most straightforward formulation that combines the von Kármán model with the assumption of timeindependent Poisson ratio. The simplified elastic model mostly provides response in satisfactory agreement with full viscoelastic solutions. However, it can lead to unsafe or inaccurate predictions for rapid changes of loading. These findings provide a suitable basis for extensions towards laminated plates and glass layer fracture, owing to the modular format of layerwise theories.

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Section: Methodsmentioning

confidence: 99%

Section: Incremental Formulation For Constant Bulk Modulusmentioning

confidence: 99%

“…Note that the admissible generalized displacements u must satisfy the inter-layer continuity conditions (2) or (5), written compactly as…”

Section: Variational Settingmentioning

confidence: 99%

Section: A1 Von Kármán Beamsmentioning

confidence: 99%

“…(37)]. Therefore, we provide here only the history-dependent contribution: ∆ f (2) int,e,1 = −δN (2) x,e (t n ) cos β (2) e − δV (2) z,e (t n ) sin β (2) e , ∆ f…”

Section: A2 Reissner Beamsmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of viscoelastic finite element models for laminated glass beams

Zemanová

Zeman

Šejnoha

2017

International Journal of Mechanical Sciences

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Numerical Analysis of Laminated Glass Panels with Articulared Bolted Point Fixings

et al. 2022

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This paper reports on a finite element numerical investigation for pointed fixed laminated glass panels (PFLGP). The study focused on the influence of the fixing elements and interlayer material. Two mechanical point fixing solutions were studied: i) embedded and ii) countersunk bolt fixings. Two types of interlayers were considered: EVASAFE and PVB. The numerical models were developed with FE software Abaqus. Results are validated with ongoing experimental research, considering a selection of single PFLGP subjected to wind loads. The different numerical modelling techniques for each fixing type are described and detailed, allowing further developments on the characterization of these systems.

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A Robust Triboelectric Nanogenerator Resistant to Humidity and Temperature in Ambient Environment

Shankaregowda

Nanjegowda

Guan

et al. 2023

Physica Rapid Research Ltrs

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Triboelectric nanogenerator (TENG) is an energy harvesting technology from widespread mechanical energy based on the combined effects of triboelectrification and electrostatic induction. TENG devices are promising to be integrated into human daily life and their stability in the ambient environment is quite crucial to guarantee robust output. This requirement is increasing exponentially for powering various wearable/portable electronics and still remains as a challenge. Herein, contact and separation mode‐based, humidity‐ and temperature‐resistant TENG (HT‐TENG) is fabricated utilizing ethylene vinyl acetate and polytetrafluoroethylene tape as frictional layers. By harvesting biomechanical energy, the device could generate peak‐to‐peak open circuit voltage of ≈210 V and short‐circuit current of ≈12.85 μA, respectively. The as‐fabricated device is tolerant to fluctuating relative humidity ranging from 10% to 60% and temperature ranging from 10 to 60 °C. Further, the device is shown to charge 22 and 47 μF commercial capacitors to 3 V using rectifier bridges, glowing light‐emitting diodes, powering digital wrist watches, and a calculator. Thus HT‐TENG as an efficient power source reliably operates not only in typical conditions, but also in desert and frigid environments, thereby extending the applicability and commercialization of the device in the global environments.

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Long-term Laminated Glass Four Point Bending Test with PVB, EVA and SG Interlayers at Different Temperatures

Cited by 63 publications

References 2 publications

Comparison of viscoelastic finite element models for laminated glass beams

Comparison of viscoelastic finite element models for laminated glass beams

Numerical Analysis of Laminated Glass Panels with Articulared Bolted Point Fixings

A Robust Triboelectric Nanogenerator Resistant to Humidity and Temperature in Ambient Environment

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