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    A fundamental study on the heat partition ratio of vehicle disc brakes

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    Publication date
    2013
    Author
    Loizou, Andreas
    Qi, Hong Sheng
    Day, Andrew J.
    Keyword
    Interface tribo-layer, Automotive brakes, Friction, Equivalent thermal conductance, 2-D coupled temperature displacement model, Heat partition
    Peer-Reviewed
    Yes
    
    Metadata
    Show full item record
    Abstract
    The interface tribo-layer (ITL) in an automotive brake friction pair is a layer of material created from transfer films, wear particles, and surface transformations between the rotor and stator. Its presence in a brake friction interface has been proven, e.g. by the existence of a temperature ‘jump’ across the friction interface. In this paper two static transient heat transfer models which force one dimensional heat flow, have been used to investigate the ITL behaviour and obtain an equivalent thermal conductance value. The ITL equivalent thermal conductance value is important as it reduces computational requirements and software restrictions encountered in the physical model of the ITL. This approach is developed into a more realistic two-dimensional coupled temperature-displacement model using commercial FEA software (ABAQUS). A newly developed relationship that utilises the contact pressure, real contact area, and the ITL equivalent thermal conductance, has been used to estimate the effective thermal conductance at the friction interface. Subsequently the effective thermal conductance relationship is combined with the 2-D coupled temperaturedisplacement model. The combination of this relationship with the 2D FE model provides a new method of heat partition prediction in brake friction pairs. Heat partition at a brake friction interface is confirmed to be neither uniform nor constant with time.
    URI
    http://hdl.handle.net/10454/8000
    Version
    published version paper
    Citation
    Loizou A, Qi HS and Day AJ (2013) A Fundamental Study on the Heat Partition Ratio of Vehicle Disk Brakes. Journal of Heat Transfer, 135 (12): Article No. 121302, 8p.
    Link to publisher’s version
    http://dx.doi.org/10.1115/1.4024840
    Type
    Article
    Notes
    The full text will not be made available in Bradford Scholars due to the publisher's copyright policies.
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    Engineering and Informatics Publications

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