Change in the degree of anisotropy of unidirectional glass-reinforced plastics during winding

The change in the degree of anisotropy of the principal elastic and strength properties of unidirectional glass-reinforced plastics during the winding process is described. Two such materials — LSB-F and LSO-R-2M — have been experimentally investigated. The anisotropy of the elastic properties is characterized by the parameter and that of the strength properties by the parameter =/_r.Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 5, pp. 953–956, September–October, 1970.