X-ray microtomographic imaging of kink bands in carbon fibre-epoxy composites

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    The three-dimensional (3-D) morphology of damage modes in kink bands formed in carbon fibre reinforced polymer (CFRP) composites under compression is presented. Specimens comprised unidirectional (UD) cylindrical carbon fibre/epoxy composite samples, fabricated using a small-scale resin infusion (SSRI) method. High-resolution X-ray micro-tomography (µCT), following uniaxial compression testing, has been used to visualise the morphology of kink bands and the associated failure mechanisms in 3-D. 3-D segmented volume and two-dimensional (2-D) orthogonal virtual sections parallel to the loading axis are used to help explain the kink band geometry, including the interaction between fully developed kink-band boundaries (defined by fibre breaks) and splitting along the fibre direction. It is proposed that two narrow bands formed at the points of maximum deflection caused the development of the wide kink band that leads to the final failure.
    Original languageEnglish
    Publication statusPublished - Jun 2014
    Event16th European Conference on Composite Materials - Sevilla, Spain
    Duration: 22 Jun 201426 Jun 2014


    Conference16th European Conference on Composite Materials
    Abbreviated titleECCM16


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