Accession Number : AD0870162

Title :   The Effect of Voids on the Mechanical Properties of High Modulus Graphite Fiber/Epoxy - Reinforced Composites.

Descriptive Note : Rept. for 26 Aug 69-26 Mar 70,

Corporate Author : AVCO CORP LOWELL MA SYSTEMS DIV

Personal Author(s) : Lenoe, E. M.

Report Date : 26 MAR 1970

Pagination or Media Count : 191

Abstract : The report presents the results of a detailed investigation of various methods of characterizing voids in graphite epoxy composites. The importance of such studies is the necessity to describe voids for our correlation of destructive and non-destructive measurements and in order to apply current theoretical results. Studies of void effects were extended by fabrication of more than forty laminate panels with void fractions ranging up to 11% and for fiber contents varying from 50 to 73 volume percent. Subsequent destructive and non-destructive testing provided correlations with shear, flexure, and compression response. The main contribution here was the isolation of fiber content and void fraction influences and interactions. Of particular interest are the investigations of shear wave phenomena. (Author)

Descriptors :   (*REINFORCED PLASTICS, CARBON FIBERS), (*COMPOSITE MATERIALS, REINFORCED PLASTICS), (*MECHANICAL PROPERTIES, DEFECTS(MATERIALS)), CLASSIFICATION, GRAPHITE, EPOXY RESINS, NONDESTRUCTIVE TESTING, LAMINATED PLASTICS.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE