Browsing by Author "Ozcan, AR"

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    Evaluation of the failure responses of filament wound and pre-preg wrapped glass fiber/epoxy composite tubes under quasi-static torsional loading
    Soykok, IF; Ozcan, AR; Tas, H
    This paper introduces an experimental and numerical investigation into hollow cylindrical thin-walled glass fibre reinforced epoxy matrix composite shafts produced by using both pre-preg wrapping and filament winding methods. The filament wound samples were manufactured with four different helix angles ([+/- 30](FW), [+/- 45](FW), [+/- 60](FW), and [+/- 75](FW)), whereas [0, 90]pp pre-pregs was utilised for producing the wrapped kind of samples. In order to assess the quasi-static failure responses, the samples were subjected to increasing amount of torsional load at a fixed angular rotation speed. The experimental findings of [+/- 30](FW), [+/- 45](FW), and [+/- 60](FW) samples were found to be very compatible with those obtained via Finite Element Analysis (FEA). Contrarily, the numerical model were not able to describe accurately the load-displacement behaviour of [+/- 75](FW) and [0, 90](PP) with the exception of the initial loading phase. [+/- 45](FW) was found as the most favourable option for designers in terms of torsional stiffness. Whereas, those characterised by [+/- 30](FW), and [+/- 60](FW) exhibited very close torsional resistances in a difference range of only 5%. [0, 90](P)(P) exhibited the lowest average torsional failure resistant and stiffness but the highest average rotation angle before rupture.