Mechanical characterization of filament wound composite tubes by internal pressure testing

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2005

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Karpuz, Pınar

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The aim of this study is to determine the mechanical characteristics of the filament wound composite tubes working under internal pressure loads, generating data for further investigation with a view of estimating the remaining life cycle of the tubes during service. Data is generated experimentally by measuring the mechanical behavior like strains in hoop direction, maximum hoop stresses that are formed during internal pressure loading. Results have been used to identify and generate the necessary data to be adopted in the design applications. In order to determine these parameters, internal pressure tests are done on the filament wound composite tube specimens according to ASTM D 1599-99 standard. The test tubes are manufactured by wet filament winding method, employing two different fiber types, two different fiber tension settings and five different winding angle configurations. The internal pressure test results of these specimens are studied in order to determine the mechanical characteristics, and the effects of the production variables on the behavior of the tubes. Pressure tests revealed that the carbon fiber reinforced composite tubes exhibited a better burst performance compared to the glass fiber reinforced tubes, and the maximum burst performance is achieved at a winding angle configuration of [±54°]3[90°]1. In addition, the tension setting is found not to have a significant effect on the burst performance. The burst pressure data and the final failure modes are compared with the results of the ASME Boiler and Pressure Vessel Code laminate analysis, and it was observed that there is a good agreement between the laminate analysis results and the experimental data. The stress ا strain behavior in hoop direction are also studied and hoop elastic constants are determined for the tubes.

Subject Keywords

General Technology.

URI

http://etd.lib.metu.edu.tr/upload/12606128/index.pdf
https://hdl.handle.net/11511/15125

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

P. Karpuz, “Mechanical characterization of filament wound composite tubes by internal pressure testing,” M.S. - Master of Science, Middle East Technical University, 2005.