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Measuring Strains through the Thickness of a Composite Structural Specimen Subjected to Bending

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Abstract

This study concerns the central reinforced zone of a composite structural specimen. In order to estimate the strain distribution during a series of three and four-point bending tests, several optical fiber Bragg grating sensors have been embedded in various levels of the ply stack. Simultaneously, surface strain field measurements by 3-D digital image correlation are undertaken. Both techniques show a general linear distribution of longitudinal strains through the thickness of the thick zone but values are slightly different. A numerical model is developed and a test-calculation dialogue is carried out. The complementary information given by the two optical techniques for in-core and surface measurements reveals the importance of considering structural and edge effects.

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Authors and Affiliations

  1. Laboratoire de Génie Mécanique de Toulouse (LGMT), University of Toulouse, INSA, UPS, 133, Avenue de Rangueil, 31077, Toulouse, France

    M. Mulle, R. Zitoune & F. Collombet

  2. CROMeP, Ecole Mines Albi, 81013, Albi CT Cedex 09, France

    L. Robert

  3. DDL Consultants, Pas de Pouyen, 83330, Le Beausset, France

    Y.-H. Grunevald

Authors
  1. M. Mulle
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  2. R. Zitoune
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  3. F. Collombet
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  4. L. Robert
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  5. Y.-H. Grunevald
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Correspondence to M. Mulle.

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Mulle, M., Zitoune, R., Collombet, F. et al. Measuring Strains through the Thickness of a Composite Structural Specimen Subjected to Bending. Exp Mech 49, 877–880 (2009). https://doi.org/10.1007/s11340-008-9209-2

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  • DOI: https://doi.org/10.1007/s11340-008-9209-2

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