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Boron filament-epoxy composite tubes were evaluated for use as long column members in a spacecraft. Struts, 8 ft long and 3.2 in. in diameter, were designed, fabricated, and tested. After evaluation of test results, three-ply and four-ply laminates were selected to satisfy design load requirements of 5000 and 7000 lb., respectively. These designs were 33 and 45 percent lighter than 6061-T6 aluminum tubes with the same column design load. Effects of eccentricities were considered for column design as well as theoretical Euler buckling and local crippling failure loads.
boron, column, epoxy laminates, composite materials, compression, design, evaluation, tests
Goodman, J. W.
Member of Technical StaffPersonal member ASTM, Applied Materials, Redondo Beach, Calif.
Gliksman, J. A.
Member of Technical Staff, Structural Analysis, Redondo Beach, Calif.