Tarakcioğlu, NecmettinSamancı, A.Arıkan, HüseyinAkdemir, Ahmet2020-03-262020-03-2620070263-8223https://dx.doi.org/10.1016/j.compstruct.2006.05.015https://hdl.handle.net/20.500.12395/21684In this study, the fatigue behavior of (+/- 55 degrees)(3) filament wound composite pipes with a surface crack under alternating internal pressure has been investigated. Glass reinforced plastic (GRP) pipes were made of E-glass/epoxy and tested in an open-ended condition. For this study, a PLC controlled hydraulic test stand has been established. Test specimens have antisymmetric six layers which have +/- 55 degrees winding angles. Fatigue tests of the pipes with a surface crack which have notch aspect ratio a/c = 0.2 and notch-to-thickness ratios a/t = 0.25, 0.38 and 0.50 in the axial direction have been carried out in accordance with ASTM D-2992. This standard allows a frequency of 25 cycles per minute and an R = 0.05 stress ratio. Tests have been performed at three different maximum stress levels, which were 50%, 40% and 30% of the ultimate hoop stress. Final failure of the GRP pipes has been examined and fatigue test results are presented by means of (S-N) curves and delamination damage zone area-cycle (A-N) curves. (C) 2006 Elsevier Ltd. All rights reserved.en10.1016/j.compstruct.2006.05.015info:eu-repo/semantics/closedAccesspolymer-matrix composites (PMCs)fatiguefilament windingsurface crackArticle802207211Q1WOS:000247163300005Q1