The effective thickness of laminated glass: Inconsistency of the formulation in a proposal of EN-standards

2013 ◽  
Vol 55 ◽  
pp. 109-118 ◽  
Author(s):  
Laura Galuppi ◽  
Gianni Royer-Carfagni
Keyword(s):  
Effective Thickness ◽  
Laminated Glass

scholarly journals Buckling of multilayered laminated glass beams: Validation of the effective thickness concept

2017 ◽  
Vol 169 ◽  
pp. 2-9 ◽  
Author(s):  
F. Pelayo ◽  
M. López-Aenlle ◽  
G. Ismael ◽  
A. Fernández-Canteli
Keyword(s):  
Effective Thickness ◽  
Laminated Glass

scholarly journals The effective thickness of laminated glass plates

2012 ◽  
Vol 7 (4) ◽  
pp. 375-400 ◽  
Author(s):  
Laura Galuppi ◽  
Gianni Royer-Carfagni
Keyword(s):  
Effective Thickness ◽  
Laminated Glass ◽  
Glass Plates

scholarly journals VARIATIONALLY-BASED EFFECTIVE DYNAMIC THICKNESS FOR LAMINATED GLASS BEAMS

2017 ◽  
Vol 13 ◽  
pp. 109
Author(s):  
Jaroslav Schmidt ◽  
Alena Zemanová ◽  
Tomáš Janda ◽  
Jan Zeman ◽  
Michal Šejnoha
Keyword(s):  
Mechanical Response ◽  
Natural Frequencies ◽  
Free Vibrations ◽  
Effective Thickness ◽  
Laminated Glass ◽  
New Approach ◽  
Acceptable Accuracy ◽  
Modal Damping ◽  
Effective Dynamic ◽  
Marine Engineering

Laminated glass, consisting of glass layers connected with transparent foils, has found its applications in civil, automotive, or marine engineering. Due to a high contrast in layer properties, mechanical response of laminated glass structures cannot be predicted using classical laminate theories. On the other hand, engineering applications demand easy-to-use formulas of acceptable accuracy. This contribution addresses such simplified models for free vibrations of laminated glass beams, with the goal to determine their natural frequencies and modal damping properties. Our strategy is to approximate the complex behavior of a laminated structure with that of an equivalent monolithic beam. Its effective thickness is determined by the variational method proposed by Galuppi and Royer-Carfagni for static problems, which we extended for modal analysis. We show that this new approach overcomes inaccuracies of the currently used dynamic effective thickness model by López-Aenlle and Pelayo.

Enhanced Effective Thickness (EET) of curved laminated glass

2015 ◽  
Vol 7 (1-2) ◽  
pp. 71-92 ◽  
Author(s):  
Laura Galuppi ◽  
Gianni Royer-Carfagni
Keyword(s):  
Effective Thickness ◽  
Laminated Glass

scholarly journals Enhanced Effective Thickness of multi-layered laminated glass

2014 ◽  
Vol 64 ◽  
pp. 202-213 ◽  
Author(s):  
Laura Galuppi ◽  
Gianni Royer-Carfagni
Keyword(s):  
Effective Thickness ◽  
Laminated Glass

Frequency Response of Laminated Glass Elements: Analytical Modeling and Effective Thickness

2013 ◽  
Vol 65 (2) ◽  
Author(s):  
M. L. Aenlle ◽  
F. Pelayo
Keyword(s):  
Unit Length ◽  
Thermal Conditions ◽  
Effective Thickness ◽  
Analytical Models ◽  
Elastic Behavior ◽  
Elastic Model ◽  
Laminated Glass ◽  
Exponential Decay Rate ◽  
Linear Viscoelastic Material ◽  
Different Temperatures

Laminated glass elements are sandwich structures where the glass presents linear-elastic behavior, whereas the polymer interlayer is, in general, a linear-viscoelastic material. Several analytical models have been proposed since the 1950s to determine the response of laminated glass elements to both frequency and thermal conditions. In this paper, it is proved that Ross, Kerwin, and Ungar's model can be considered as a particular case of the Mead and Markus model when the exponential decay rate per unit length is neglected. The predictions of these models are compared with those obtained from operational modal tests carried out on a laminated glass beam at different temperatures. Finally, a new effective thickness for the dynamic behavior of laminated glass beams, which allows the determination of the dynamic response using a simple monolithic elastic model, is proposed.

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