Fatigue crack growth of filament wound GRP pipes with a surface crack under cyclic internal pressure
作者： Ahmet Samanci , Ahmet Avci , Necmettin Tarakcioglu , Ömer Sinan Şahin
DOI: 10.1007/S10853-008-2820-X
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摘要: In this study, fatigue damage behavior of (±753) filament wound composite pipes with a surface crack under alternating internal pressure was investigated. The specimens were tested at room temperature and exposed to open ended tests in which the pipe can be deformed freely axial direction. carried out accordance ASTM D-2992 standard. generated by conventional hydraulic oil. low cycle performed 0.42 Hz frequency R = 0.05 stress ratio. Glass reinforced polymer (GRP) are made E-glass/epoxy have configuration. Surface cracks machined direction depth-to-thickness ratios a/t 0.25–0.38–0.50 depth length ratio a/c 0.2. Tests three different loads 50%, 40%, 30% ultimate hoop strength unnotched pipes. failure GRP during test observed results presented means (S–N) curves delamination zone area-cycle (A–N) curves.
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