Effects of winding angles on the strength of filament wound composite ribes subjected to different loading modes

Filament wound pipes constructed from a corrosion resistant epoxy resin and E-glass filament fiber wound at nine different wind angles were tested. Experimental data are presented to show the effects of winding angle on the strength of 46.05 mm diameter tube and 300 mm length under three different loading modes. The pipes were tested to failure under hoop pressure loading (mode I) biaxial pressure loading (mode II), and biaxial pressure with axial compressive loading (mode III). Stress/strain response up to fracture for three different winding angles under different loading modes were obtained. The test results show the effect of the winding angle on elastic constants and on non linear stress strain behaviour. The test results also show that the optimum winding angles for filament wounded pipes depend on the loading modes applied. It shows that for loading mode I the filament wound pipe should be wound at 55 degrees, for loading mode H the filament wound pipe should be wound at 75 degrees, while for loading mode III the filament wound pipe should be wound at 85 degrees.