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Role of skin/core structure and inclusions in the fatigue crack initiation and propagation in organic fibres

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Abstract

High performance polyamide and polyester thermoplastic fibres fail by a distinct fatigue process but the microstructural phenomena involved in crack initiation, have, until now, been difficult to interpret. The process of crack initiation has been revealed as being associated with the presence of small solid inclusions, observed in all the studied fibres. The position of the inclusions is seen to be important and this may be explained in terms of fibre macroscopic morphology linked to the manufacturing process. The presence of a skin/core structure is revealed. The mechanical experiments used throughout this study were performed on single fibres with, numerous analyses being carried out using SEM, optical microscopy and birefringence techniques.

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Acknowledgement

The authors wish to thank F. Grillon for his support for SEM observation.

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Authors and Affiliations

  1. Centre des Matériaux Pierre et Marie Fourt, Ecole des Mines de Paris, U.M.R. CNRS 7633, BP 87, Evry Cedex, 91003, France

    C. Le Clerc, A. R. Bunsell & A. Piant

  2. Centre de Mise en Forme des Matériaux, Ecole des Mines de Paris, Rue Claude Daunesse, Sophia Antipolis Cedex, F-06904, France

    B. Monasse

Authors
  1. C. Le Clerc
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  2. A. R. Bunsell
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  3. A. Piant
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  4. B. Monasse
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Correspondence to C. Le Clerc.

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Le Clerc, C., Bunsell, A.R., Piant, A. et al. Role of skin/core structure and inclusions in the fatigue crack initiation and propagation in organic fibres. J Mater Sci 41, 6830–6842 (2006). https://doi.org/10.1007/s10853-006-0374-3

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  • DOI: https://doi.org/10.1007/s10853-006-0374-3

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