Use of carbon/epoxy towpregs during dry filament winding of composite flat specimens and pressure vessels

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Yiğit Kemal Ökten_2035392.pdf

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2022-6-28

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Ökten, Yiğit Kemal

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The main purpose of this thesis is to evaluate the effects of certain processing parameters on the performance of carbon/epoxy towpreg wound composite structures. For this purpose, composite sample productions and their evaluations were conducted in two steps. In the first step, dry winding of carbon/epoxy towpregs was used for the production of flat composite plates. Their evaluation was performed by rheological analysis, interlaminar shear tests and unidirectional tensile tests. In the second step, towpreg dry winding was used for the production of composite pressure vessel samples. Their performance was evaluated by observing the effects of various winding process parameters on the safety of the vessels via hydrostatic burst pressure tests. Compared to the traditional wet filament winding, the main difficulty observed was maintaining the “straight towpreg path” necessary for efficient winding operations. This problem was prevented by applying higher tension forces during dry winding. It was generally concluded that, when the process parameters were properly determined, conventional carbon/epoxy wet filament winding technique could be replaced by carbon/epoxy towpreg dry winding technique for the production of both flat structures and hollow vessel structures.

Subject Keywords

Carbon/epoxy towpreg, Wet filament winding, Dry towpreg winding, Burst pressure

URI

https://hdl.handle.net/11511/98148

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Y. K. Ökten, “Use of carbon/epoxy towpregs during dry filament winding of composite flat specimens and pressure vessels,” M.S. - Master of Science, Middle East Technical University, 2022.