NASA Technical Reports Server (NTRS) : Evaluation pdf

NASA Technical Reports Server (NTRS) : Evaluation

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Currently, Hysol adhesive EA-934NA is used to bond the Field Joint Protection System on the Shuttle rocket motors at Kennedy Space Center. However, due to processing problems, an adhesive with a higher viscosity is needed to alleviate these difficulties. One possible solution is to add Cab-O-Sil to the current adhesive. The adhesive strength and bond strengths that can be obtained when 2.5 percent Cab-O-Sil is added to adhesive EA-934NA are examined and tested over a range of test temperatures from -20 to 300 F. Tensile adhesion button and lap shear specimens were bonded to D6AC steel and uniaxial tensile specimens (testing for strength, initial tangent modulus, elongation and Poisson’s ratio) were prepared using Hysol adhesive EA-934NA with 2.5 percent Cab-O-Sil added. These specimens were tested at -20, 20, 75, 100, 125, 150, 200, 250, and 300 F, respectively. Additional tensile adhesion button specimens bonding Rust-Oleum primed and painted D6AC steel to itself and to cork using adhesive EA-934NA with 2.5 percent Cab-O-Sil added were tested at 20, 75, 125, 200, and 300 F, respectively.

Results generally show decreasing strength values with increasing test temperatures. The bond strengths obtained using cork as a substrate were totally dependent on the cohesive strength of the cork

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 6/1/1990
• Year: 1990
• Book Topics/Themes: NASA Technical Reports Server (NTRS), ADHESION TESTS, ADHESIVE BONDING, ADHESIVES, CORK (MATERIALS), JOINTS (JUNCTIONS), PAINTS, STEELS, TEMPERATURE EFFECTS, TENSILE STRENGTH, COHESION, ELONGATION, POISSON RATIO, PROTECTION, SPACE SHUTTLE MAIN ENGINE, SUBSTRATES, TANGENTS, VISCOSITY, Caldwell, Gordon A

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