Accession Number : ADA305006

Title :   Bolted Joints In Graphite-Epoxy Composites.

Descriptive Note : Contract rept.,

Corporate Author : MCDONNELL DOUGLAS CORP LONG BEACH CA DOUGLAS AIRCRAFT DIV

Personal Author(s) : Hart-Smith, L. J.

PDF Url : ADA305006

Report Date : JUN 1976

Pagination or Media Count : 157

Abstract : The purpose of this investigation was to conduct a series of tests on bolted joints in graphite-epoxy composites and develop empirical analysis methods. The fiber patterns tested include the quasi-isotropic pattern and two near-isotropic patterns. The graphite-epoxy used (Thornel 300/ Narmco 5208) is a current high-strength material of moderate modulus and is used widely throughout the composites industry. About one half of the specimens tested were from laminates that had the fibers aligned with the load direction replaced by S-glass. These hybrid laminates exhibited greater stress concentration relief at bolt holes than did the all-graphite materials. The findings of this investigation are supplemented with those from prior work.

Descriptors :   *LAMINATES, *GRAPHITE EPOXY COMPOSITES, *BOLTED JOINTS, TENSILE STRESS, FIBER REINFORCED COMPOSITES, ORIENTATION(DIRECTION), BEARING STRENGTH, HIGH STRENGTH.

Subject Categories : Laminates and Composite Materials
      Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE