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    The meshing of timing belt teeth in pulley grooves

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    Publication date
    1997
    Author
    Childs, T.H.C.
    Dalgarno, K.W.
    Hojjati, M.H.
    Tutt, M.J.
    Day, Andrew J.
    Keyword
    Power transmission
    Timing belts
    Failure analysis
    Tooth root cracking
    Rights
    © 1997 IMechE. Reproduced in accordance with the publisher's self-archiving policy.
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    The work described here has been carried out to obtain a better understanding of the tooth root cracking failure mode of timing belts. Previous work has demonstrated the close dependence of this on the tooth deflections of fully meshed teeth, generated by torque transmission, but has not considered the additional distortions generated in the partially meshed conditions at entry to and exit from a pulley groove. Approximate compatibility and constitutive equations are combined with a rigorous consideration of tooth equilibrium in partial meshing to show how bending moments are generated at both exit from a driven pulley and entry to a driving pulley. Experimentally determined belt lives correlate very well with a combined measure of fully meshed tooth strain and strain due to bending at entry or exit. The analysis also shows that this strain measure reduces with increasing belt tooth stiffness, confirming the importance of a high tooth stiffness for a long belt life. Tooth force variations through the partial meshing cycle have also been predicted and compared with measurements obtained from a special strain gauge instrumented pulley. A greater pulley rotation than is predicted is required for a belt tooth to seat in a pulley groove. There is room for improvement in the modelling
    URI
    http://hdl.handle.net/10454/2378
    Version
    published version paper
    Citation
    Childs, T. C. H., Dalgarno, K. W., Hojjati, M. H., Tutt, M. J. and Day, A. J. (1997) The meshing of timing belt teeth in pulley grooves. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. Vol. 211, No. 3, pp. 205-218.
    Link to publisher’s version
    http://journals.pepublishing.com/home/main.mpx
    Type
    Article
    Collections
    Engineering and Informatics Publications

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