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    Effects of external hard particles on brake friction characteristics during hard braking

    Access Status
    Fulltext not available
    Authors
    Abdul Hamid, M.K.
    Stachowiak, Gwidon
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Abdul Hamid, M.K. and Stachowiak, G. 2012. Effects of external hard particles on brake friction characteristics during hard braking. Jurnal Teknologi. 58: pp. 53-58.
    Source Title
    Jurnal Teknologi
    ISSN
    01279696
    URI
    http://hdl.handle.net/20.500.11937/26492
    Collection
    • Curtin Research Publications
    Abstract

    The effects of external hard particles on the friction coefficients and its oscillation amplitudes during hard braking were investigated. Silica sands of the size between 180 to 355 µm were used during the experiments. The results were compared to the results obtained without the grit particles present in order to determine the change in friction coefficient and the fluctuation of frictional oscillation amplitude. Different sliding speeds were applied and external hard particle of different size is found to significantly affect the friction coefficient and standard deviation of friction oscillation amplitude values. The friction coefficients increase with hard particle due to the rapid changes of the effective contact area and the abrasion mode. Some embedded particles operating in two body abrasion mode help to increase the disc surface roughness and influence the stopping time of the disc. The standard deviation values of friction oscillation amplitude however were stable due to more wear debris produced and get compacted to form friction films assisting friction and they tend to reduce at medium speeds because many contact plateaus and effective contact area started to stabilize.

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    • Effects of hard particles on friction coefficients and particle embedment in brake system during hard braking
      Abdul Hamid, M.; Stachowiak, Gwidon; Syahrullail, S. (2012)
      The effects of hard particles on the friction coefficients and particle embedment during hard braking were investigated. Silica sands grit of the size between 180 to 355 µm were used during the experiments. The results ...
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      The effect of grit particle size on frictional characteristics was investigated using a vertically oriented brake test rig. Silica sand of grit sizes 50-180 µm, 180-355 µm and 355-500 µm were used in drag mode application. ...
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      The effect of hard particle grit size on friction coefficients and particle embedment of braking system was investigated using a model brake test rig. Silica sand grit sizes ranging from 180 - 355 µm were used in drag and ...
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