Accession Number : ADA303217
Title : Design, Fabrication and Test of Graphite/Polyimide Composite Joints and Attachments - Summary.
Descriptive Note : Contractor rept.,
Corporate Author : BOEING AEROSPACE CO SEATTLE WA
Personal Author(s) : Cushman, J. B. ; McCleskey, S. F. ; Ward, S. H.
PDF Url : ADA303217
Report Date : JAN 1983
Pagination or Media Count : 93
Abstract : This report summarizes the design, analysis and testing performed to develop four types of graphite/polyimide (Gr/PI) bonded and bolted composite joints for lightly loaded control surfaces on advanced space transportation systems that operate at temperatures up to 561K (550 deg F). Material properties and 'Small Specimen' tests were conducted to establish design data and to evaluate specific design details. 'Static Discriminator' tests were conducted on preliminary designs to verify structural adequacy. Scaled-up specimens of the final joint designs, representative of production size requirements, were subjected to a series of static and fatigue tests to evaluate joint strength. Effects of environmental conditioning were determined by testing aged (125 hours 589K (600 deg F)) and thermal cycled (116K to 589K (-250 deg F to 600 deg F), 125 times) specimens. It is concluded Gr/PI joints can be designed and fabricated to carry the specified loads. Test results also indicate a possible resin loss or degradation of laminates after exposure to 589K (600 deg F) for 125 hours. jg p93
Descriptors : *GRAPHITE, *JOINTS, *POLYIMIDE RESINS, TEST AND EVALUATION, REQUIREMENTS, PRODUCTION, DEGRADATION, SIZES(DIMENSIONS), POLYMERS, COMPOSITE MATERIALS, LAMINATES, FABRICATION, COMPOSITE STRUCTURES, STRENGTH(MECHANICS), BONDED JOINTS, SCALING FACTOR, LOSSES, DESIGN CRITERIA, SPACE TRANSPORTATION, STATIC TESTS, FATIGUE TESTS(MECHANICS), CONTROL SURFACES, DISCRIMINATORS, BOLTED JOINTS.
Subject Categories : Polymer Chemistry
Laminates and Composite Materials
Couplers, Fasteners, and Joints
Distribution Statement : APPROVED FOR PUBLIC RELEASE