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Experimental Study of Bending Behaviour of Reinforcements

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Abstract

In composite reinforcement shaping, textile preform undergo biaxial tensile deformation, in plane shear deformation, transverse compaction and out-of-plane bending deformations. Bending deformations have been neglected in some simulation codes up to now, but taking into account them would give more accurate simulations of forming especially for stiff and thick textiles. Bending behaviour is specific because the reinforcements are structural parts and out of plane properties cannot be directly deduced from in-plane properties, like for continuous material. Because the standard tests are not adapted for stiff reinforcements with non linear behaviour a new flexometer using optical measurements has been developed to test such reinforcements. This new device enables to carry out a set of cantilever tests with different histories of load. A series of tests has been performed to validate the test method and to show the capacities of the new flexometer to identify non linear non elastic behaviour.

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Notes

  1. but non necessarily linear

  2. but it can be elastic nevertheless

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Acknowledgements

The authors thank Laurence Schacher of the Laboratoire de Physique et Mécanique Textiles de Mulhouse (ENSISA) to have allowed us to perform the KES bending tests. The authors acknowledge also the support of the ITOOL European project: “Integrated Tool for Simulation of Textile Composites”, European Specific Targeted, Research Project, SIXTH FRAMEWORK PROGRAMME, Aeronautics and Space, http://www.itool.eu.

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  1. Institut PRISME/MMH, University of Orléans, Polytech’Orléans, 8 rue Leonard de Vinci, 45072, ORLÉANS Cedex 2, France

    E. de Bilbao, D. Soulat, G. Hivet & A. Gasser

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  1. E. de Bilbao
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  2. D. Soulat
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  3. G. Hivet
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  4. A. Gasser
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Correspondence to E. de Bilbao.

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de Bilbao, E., Soulat, D., Hivet, G. et al. Experimental Study of Bending Behaviour of Reinforcements. Exp Mech 50, 333–351 (2010). https://doi.org/10.1007/s11340-009-9234-9

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