DYNAMIC STRENGTH OF FIBER GLASS SHELLS

This paper presents generalization of results, obtained by experimenta l investigations of dynamic response, strength, and load-bearing abili ty of cylindrical and spherical shells, manufactured from composite ma terials on the basis of fiber glass, under loading them by explosion o f compact high-explosive charges on the inside. The paper describes me chanisms and criteria of destruction of such shells, methods to improv e their specific load-bearing ability. Results of experiments concerni ng investigation of dependence of specific load-bearing ability on loa ding rate, absolute sizes of samples, structural and technological pec uliarities of the material are considered. On the basis of considered results it is suggested to use limiting strains of the most stressed c omposite layers as the general criterion of dynamic strength for mater ials of this class. We draw a conclusion that application of fiber gla sses in load-bearing shells of protective structures has considerable promise.