Failure analysis of (+/- 55 degrees)(3) filament wound composite pipes with an inclined surface crack under static internal pressure

This study conducts failure analysis of filament wound glass reinforced plastic (GRP) pipes made of E-glass/epoxy with an inclined surface crack under open-ended internal pressure. Test specimens are composed of six antisymmetric layers with (+/- 55 degrees)(3) winding angles. Tests have been performed at seven different crack angles: 0 degrees, 15 degrees, 30 degrees, 60 degrees, 45 degrees, 75 degrees, and 90 degrees, with crack-to-thickness ratio of a/t = 0.50. The burst strengths of the specimens were determined, and the dependence of the burst strength on the crack angle was examined. Published by Elsevier Ltd.