Accession Number : AD0695348

Title :   EFFECT OF FIBER MISALIGNMENT ON ELASTICITY MODULUS IN EXTENSION OF UNIDIRECTIONAL GLASS-REINFORCED PLASTICS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Tarnopolskii,Yu. M. ; Portnov,G. G. ; Zhigun,I. G.

Report Date : 26 MAR 1969

Pagination or Media Count : 15

Abstract : On the basis of the theory of laminated reinforced media with random original irregularities the effect of fiber misalignment on the elasticity modulus during the extension of unidirectional glass-reinforced plastics has been studied. It has been shown experimentally that comparatively low technological fiber misalignments can be the cause of a considerable change of the elasticity modulus. A model is proposed for determining the effect of fiber misalignment on Young's modulus; experiments on specimens with set regular fiber misalignment revealed good coincidence with theory. On the series-manufactured material AG-4S the effect of the preliminary strain of the fibers on the elasticity modulus was studied and the magnitude of optimum stretching was established. (Author)

Descriptors :   (*REINFORCED PLASTICS, MODULUS OF ELASTICITY), (*GLASS TEXTILES, ALIGNMENT), MICROSTRUCTURE, STRESSES, TENSILE PROPERTIES, DEFECTS(MATERIALS), DEFORMATION, USSR

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE