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This paper demonstrates the statistical relationships which exist between test specimens of different designs and how these relationships can be utilized in strength predictions. The specimens selected were the straight-sided tension coupon, uniaxial sandwich beam, and the acceptance-type flexure coupons. Experimental data were obtained for the c, c, [02/±45]c, [±45/902]c, and [0/±45/90]c laminates fabricated from Narmco 5505 boron-epoxy at various temperatures ranging from -65 to 420 F.
composite materials, sandwich structures, laminates, stressstrain diagrams, tests, fibers
Senior structures engineer, Convair Aerospace Division, General Dynamics, Fort Worth, Tex.