METHOD OF DESIGNING A STRONG LIGHTWEIGHT LAMINATE

摘要

Provided herein is a method of designing a strong lightweight laminate. This method uses effective thickness principles to calculate the structure of a laminate that has strength equal to that of a monolith of equal thickness. In a preferred application of the method, safety glass laminates are designed. The safety glass laminates have lower areal weight at equal strength, compared to a monolithic glass sheet of thickness equal to that of the safety glass laminate.

主权项

1. A method of designing a strong lightweight laminate, said method comprising the steps of:
a. selecting a basic material and a thickness of a monolith of the basic material; b. selecting an interlayer material; c. calculating the shear transfer coefficient Γ of a laminate having the structure “material/interlayer/material”, wherein “material” represents an outer layer of the basic material, and wherein “interlayer” represents a layer of the interlayer material having a thickness; d. selecting a ratio k of the thicknesses of the two outer layers, wherein k=1, k=1.5, or k=2; e. selecting a target weight reduction percentage and a target effective thickness; f. when k=1, using the graph of FIG. 1 to select a ratio of interlayer thickness to outer layer thickness, for a laminate having the same deflection as the monolith; g. alternatively when k=1 using the graph of FIG. 2 to select a ratio of interlayer thickness to outer layer thickness, for a laminate having the same breakage resistance as the monolith; h. when k=1, using Eqns. 2′ and 3′ to calculate the thickness of the outer layers and the thickness of the interlayer i. when k=1.5, for a laminate having the same deflection as the monolith, using the graph of FIG. 3(a) for forces applied to the thicker outer layer or the graph of FIG. 3(b) for forces applied to the thinner outer layer to select a ratio of interlayer thickness to outer layer thickness; j. alternatively when k=1.5, for a laminate having the same breakage resistance as the monolith, using the graph of FIG. 4(a) for forces applied to the thicker outer layer or the graph of FIG. 4(b) for forces applied to the thinner outer layer to select a ratio of interlayer thickness to outer layer thickness; k. when k=2, for a laminate having the same deflection as the monolith; using the graph of FIG. 5(a) for forces applied to the thicker outer layer or the graph of FIG. 5(b) for forces applied to the thinner outer layer to select a ratio of interlayer thickness to outer layer thickness l. alternatively when k=2, for a laminate having the same breakage resistance as the monolith, using the graph of FIG. 6(a) for forces applied to the thicker outer layer or the graph of FIG. 6(b) for forces applied to the thinner outer layer to select a ratio of interlayer thickness to outer layer thickness; m. when k=1.5 or when k=2, using Eqns. 5′ and 6′ to calculate the thickness of the outer layers and the thickness of the interlayer.