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    An experimental study of the effect of back rake angle in rock cutting

    267778.pdf (17.13Mb)
    Access Status
    Open access
    Authors
    Rostamsowlat, I.
    Richard, Thomas
    Evans, Brian
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Rostamsowlat, I. and Richard, T. and Evans, B. 2018. An experimental study of the effect of back rake angle in rock cutting. International Journal of Rock Mechanics and Mining Sciences. 107: pp. 224-232.
    Source Title
    International Journal of Rock Mechanics and Mining Sciences
    DOI
    10.1016/j.ijrmms.2018.04.046
    ISSN
    1365-1609
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/69956
    Collection
    • Curtin Research Publications
    Abstract

    The objective of this paper is to investigate the influence of the rake angle on the magnitude of the intrinsic specific energy and the inclination of the force acting on the cutting face of a Polycrystalline Diamond Compact (PDC) sharp cutter while tracing a groove on the surface of a rock sample. An extensive and comprehensive set of cutting experiments was performed on a wide range of quarry rock samples using a state of the art rock cutting equipment (Wombat). The results conform with the previous studies by other researchers; the intrinsic specific energy is in good agreement with the uni-axial compressive strength of the rock samples when the cutter is positioned at back rake angles between 5° to 20°. New results on a few rock samples were also obtained by performing novel experimental tests at very large rake angles (θ > 70°) as well as negative rake angles, showing that the intrinsic specific energy increases dramatically once the back rake angle exceeds 75°. Results also indicate that the decrease of the apparent interfacial friction angle with increasing back rake angle seems to follow a “universal trend” weakly dependent on the rock sample.

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