The concept of integral flange for filament wound pipe is to build the end flanges during pipe winding process. While this technique has great economic potential compared with currently used flange fabrication methods, it creates many technical difficulties in both manufacturing and analysis. In this paper experimental and analytical studies are conducted in developing integral flange technology. A pattern generator, which is a computer program, has been developed to create the desired winding patterns for pipe and flange. Several integral flange samples have been fabricated using a computer controlled filament winder. A tensile test has been conducted to evaluate the strength of the samples. Theoretically, a 3-D finite element analysis has been performed using anisotropic solid layer elements (for pipe and hub) and equivalent solid elements (for flange ring with bolt hole). Prediction has also been made using the modified stress formulas based on plate and shell theory. A good agreement has been found among experimental, finite element results, and analytical prediction. Efforts are being made to optimize winding patterns and improve the strength of the flange.
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