Calculation of the moduli of elasticity and tensile strength of oriented glass-reinforced plastics on the basis of a nondestructive determination of their composition and structural parameters

The theoretical basis of the nondestructive determination of the modulus of elasticity and tensile strength of oriented glass-reinforced plastics in the direction of the principal axes of anisotropy from the resin content and porosity of the finished product is examined. The results of an experimental verification are presented.Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, Vol. 5, No. 2, pp. 332–341, March–April, 1969.