Buckling of Composite Cylindrical Characterization Specimens

Abstract
Using dimensions which are typical of current laboratory tubular specimens, critical buckling loads are determined'for unidirectional and Jaminated cylinders subjected to torsion and to axial compression. Buckling loads are obtained by using classical Fourier analysis in conjunction with Flugge's shell equations modified for anisotropic laminated materials. Comparison of buckling loads to composite strength, as estimated from maximum strain criterion, suggests that buckling is a potential problem in the use of tubular specimens. A relatively easy method for estimating buckling loads is also presented.

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