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This paper addresses thick-walled composite tubes under axisymmetric loading (axial and torsional). A thick-walled tube is manufactured from glass/epoxy composite material, having thickness to outer diameter ratio greater than 0.1. For this highly thick-walled tube, a developed test rig is built to apply a pure torsional load and measure the torsional stiffness of the tube. Adding to that, the tube is tested under a compressive axial load. This is done to validate the existence of the axial-torsional coupling and to experimentally complete the understanding of the tube structural behavior under axisymmetric loading conditions. The testing results are also used to validate the available theoretical methods used in analysis and design of composite tubes under torsion.

EXPERIMENTAL INVESTIGATION OF THICK-WALLED COMPOSITE TUBES UNDER AXISYMMETRIC LOADING