Abstract: A process for manufacturing a laminated glazing, in which a lamination interlayer is interposed between two substrates having a glass function, including: making a measurement of Young's modulus E on a sample of the interlayer, using a viscoanalyzer, by varying temperature and frequency while imposing a constant dynamic displacement; making a numerical treatment of curves obtained, using WLF (Williams-Landel-Ferry) equations, to establish a law E(f) governing behavior of a material constituting the interlayer sample at a given temperature; producing a numerical model based on a finite-element method in bending of a laminated glazing panel, wherein mechanical properties of the sample result from the preceding operations; comparing results of the numerical calculation with those obtained with analytical formulae in which participation of the interlayer in transferring shear in the laminated glazing is represented by a transfer coefficient ?; varying the transfer coefficient ? in the analytical formulae until re

Abstract: A process for manufacturing a laminated glazing unit so that it withstands a predetermined load, in which the unit includes at least one substrate having a glass function and at least one layer of polymeric interlayer. The process: obtains viscoelastic behavior of constituent material of the interlayer; calculates maximum value of at least one quantity representative of the loading resistance of the laminated glazing unit subjected to the predetermined load; adjusts dimensions of the unit such that the calculated maximum value of the quantity representative of the loading resistance of the unit is less than or equal to a permissible maximum value; and the or each substrate and the or each layer of interlayer are prepared and assembled to the adjusted dimensions.

Abstract: A process for manufacturing a laminated glazing, in which a lamination interlayer is interposed between two substrates having a glass function, including: making a measurement of Young's modulus E on a sample of the interlayer, using a viscoanalyzer, by varying temperature and frequency while imposing a constant dynamic displacement; making a numerical treatment of curves obtained, using WLF (Williams-Landel-Ferry) equations, to establish a law E(f) governing behavior of a material constituting the interlayer sample at a given temperature; producing a numerical model based on a finite-element method in bending of a laminated glazing panel, wherein mechanical properties of the sample result from the preceding operations; comparing results of the numerical calculation with those obtained with analytical formulae in which participation of the interlayer in transferring shear in the laminated glazing is represented by a transfer coefficient ?; varying the transfer coefficient ? in the analytical formulae until re