Abstract
Polyamide and polyester fibres have been subjected to flex fatigue by pulling to and fro over a pin, in order to investigate the alternative damage modes, namely cracks along kink-bands due to compression, and axial splitting due to shear stresses. Initial studies determined the conditions that were sufficiently severe to give a short enough test time but not so severe that abrasion on the pin was dominant. Fibres were then cycled for varying periods, the damage viewed in a scanning electron microscope, and the change in tensile properties, including residual strength, determined.
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References
J. W. S. Hearle and M. Miraftab, J. Mater. Sci 26 (1991) 2861.
J. W. S. Hearle, B. Lomas, W. D. Cooke and I. J. Duerden, “Fibre Failure and Wear of Materials” (Ellis Horwood, Chichester, 1989).
J. P. Den Hartog, “Strength of Materials” (McGraw-Hill, 1949; Dover, 1961).
M. Miraftab, PhD thesis, University of Manchester (1986).
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Hearle, J.W.S., Miraftab, M. The flex fatigue of polyamide and polyester fibres. JOURNAL OF MATERIALS SCIENCE 30, 1661–1670 (1995). https://doi.org/10.1007/BF00351594
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DOI: https://doi.org/10.1007/BF00351594