Abstract

The in-plane shear behaviour of an uncured composite material (i.e. prepreg sheet, dry fibre preforms etc) is one of the key parameters that influences wrinkles generation in advanced composites manufacturing processes such as automated fibre placement (AFP) and thermoforming. However, there is no standardised test method for the characterisation of uncured unidirectional prepreg subjected to pure shear loading. In this paper, a 10 off-axis tensile test is developed, and the method’s suitability is demonstrated on two different materials. The mechanical response is analysed over a range of testing rates and temperatures that are consistent with the real manufacturing process parameters. The results demonstrate the feasibility of the test method for extracting relevant material characteristics and the strain-rate and temperature dependency of the material response.
Original languageEnglish
Article number105865
JournalComposites Part A: Applied Science and Manufacturing
Volume133
Early online date9 Mar 2020
DOIs
Publication statusE-pub ahead of print - 9 Mar 2020

Keywords

  • Prepreg
  • Rheological properties
  • Mechanical testing

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