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Abstract

Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-isotropic carbon/epoxy laminates is reported. Oblique (45°) impacts between 100 m/s and 350 m/s were carried out using 3mm steel cubes on the edge and the centre of the laminates, mounted as a cantilever beam. Impact induced damage was characterised using X-ray Computed Tomography (CT) and the residual strength of impacted laminates was determined through quasi-static tensile tests. The residual strength shows a strong dependence on the impact damage size, characterised in terms of fibre fracture width and delamination area. Machined notches were then investigated and compared to impacted laminates in terms of residual strength.
Original languageEnglish
Article number107772
Number of pages9
JournalComposites Science and Technology
Volume182
Early online date6 Aug 2019
DOIs
Publication statusPublished - 29 Sep 2019

Structured keywords

  • Composites UTC
  • Bristol Composites Institute ACCIS

Keywords

  • Laminate
  • Impact behaviour
  • Strength
  • Notch

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