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        The wear of PEEK in rolling–sliding contact : Simulation of polymer gear applications

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        Author
        Hoskins, Tom
        Dearn, Karl
        Chen, Yong
        Kukureka, Steve
        Attention
        2299/12568
        Abstract
        The wear and friction in the pitch region of the centre of polymer gear teeth are not well understood. The transition around this point of the tooth between rolling and sliding has an important effect on the durability of polymer gear drives and can be simulated using a twin-disc configuration. This paper investigates the rolling-sliding wear behaviour of two poly-ether-ether-ketone (PEEK) discs running against each other with a simplified method of analysing and understanding the dynamic response of high performance polymeric gear teeth. Tests were conducted without external lubrication over a range of loads and slip ratios, using a twin-disc test rig. The wear and friction mechanisms were closely related to surface morphology, with changes in crystallinity correlating with the severity of operating conditions. Observed failure mechanisms were also related to the structure of the contact surfaces, and included surface melting and contact fatigue. Overall the PEEK discs were capable of running at low slip ratios for both low and high loads. Their performance reduced with an increase of the slip ratio. The results presented can be used in conjunction with the design process to allow the PEEK to be engineered for a specific high performance gear contact conditions.
        Publication date
        2014-01-15
        Published in
        Wear
        Published version
        https://doi.org/10.1016/j.wear.2013.09.014
        Other links
        http://hdl.handle.net/2299/12568
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