NASA Technical Reports Server (NTRS) : Test pdf

NASA Technical Reports Server (NTRS) : Test

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Standard single lap, double lap and symmetric step lap bonded joints of Celion 3000/PMR-15 graphite/polyimide composite were evaluated. Composite to composite and composite to titanium joints were tested at 116K (-250 F), 294K (70 F) and 561K (550 F). Joint parameters evaluated were lap length, adherend thickness, adherend axial stiffness, lamina stacking sequence and adherend tapering. Tests of advanced joint concepts were also conducted to establish the change in performance of preformed adherends, scalloped adherends and hybrid systems. Special tests were conducted to establish material properties of the high temperature adhesive, designated A7F, used for bonding. Most of the bonded joint tests resulted in interlaminar shear or peel failures of the composite. There were very few adhesive failures. Average test results agree with expected performance trends for the various test parameters. Results of finite element analyses and of test/analysis correlations are also presented

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 1/1/1983
• Year: 1983
• Book Topics/Themes: NASA Technical Reports Server (NTRS), FAILURE MODES, GRAPHITE-POLYIMIDE COMPOSITES, HIGH TEMPERATURE, METAL BONDING, METAL JOINTS, STATIC LOADS, DESIGN ANALYSIS, FINITE ELEMENT METHOD, PARAMETER IDENTIFICATION, SPACECRAFT CONSTRUCTION MATERIALS, Cushman, J. B., Mccleskey, S. F., Ward, S. H

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