Accession Number : ADA308724

Title :   Evaluation of Boron-Epoxy-Reinforced Titanium Tubular Truss for Application to a Space Shuttle Booster Thrust Structure.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Corvelli, Nicholas ; Carri, Robert

PDF Url : ADA308724

Report Date : JUN 1972

Pagination or Media Count : 51

Abstract : Results of a study to demonstrate the applicability of boron-epoxy-composite-reinforced titanium tubular members to a space shuttle booster thrust structure are presented and discussed. The experimental results include local buckling of all-composite and composite-reinforced-metal cylinders with low values of diameter-thickness ratio, static tests on composite-to-metal bonded step joints, and a test to failure of a boron-epoxy-reinforced titanium demonstration truss. The demonstration truss failed at 118 percent of design ultimate load. Test results and analysis for all specimens and the truss are compared. Comparing an all-titanium design and a boron-epoxy-reinforced-titanium (75 percent B-E and 25 percent Ti) design for application to the space shuttle booster thrust structure indicates that the latter would weigh approximately 24 percent less. Experimental data on the local buckling strength of cylinders with a diameter-thickness ratio of approximately 50 are needed to insure that undue conservatism is not used in future designs.

Descriptors :   *SPACE SHUTTLES, *REINFORCING MATERIALS, *TITANIUM ALLOYS, COMPOSITE MATERIALS, LAMINATES, MODULUS OF ELASTICITY, STRENGTH(MECHANICS), BONDED JOINTS, BUCKLING, TUBULAR STRUCTURES, TRUSSES, EPOXY COMPOSITES, BORON, FAILURE(MECHANICS), THRUST, LAUNCH VEHICLES, POISSON RATIO.

Subject Categories : Laminates and Composite Materials
      Properties of Metals and Alloys
      Manned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE