Effect of fibre orientation on impact damage resistance of S2/FM94 glass fibre composites for aerospace applications: an experimental evaluation and numerical validation

Khaled Giasin*, Hom Dhakal, Carol Featherson, Danil Yurievich Pimenov, Colin Lupton, Chulin Jiang, Antigoni Barouni, Ugur Koklu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

This study aims to investigate the influence of fibre orientation and varied incident energy levels on the impact-induced damage of S2/FM94, a kind of aerospace glass fibre epoxy/composite regularly used in aircraft components and often subjected to low-velocity impact loadings. Effects of varying parameters on the impact resistance behaviour and damage modes are evaluated experimentally and numerically. Laminates fabricated with four different fibre orientations [0/90/+45/−45]8s, [0/90/90/0]8s, [+45/−45]16s, and [0]32 were impacted using three energy levels. Experimental results showed that plates with unidirectional fibre orientation failed due to shear stresses, while no penetration occurred for the [0/90/90/0]8s and [+45/−45]16s plates due to the energy transfer back to the plate at the point of maximum displacement. The impact energy and resulting damage were modelled using Abaqus/Explicit. The Finite Element (FE) results could accurately predict the maximum impact load on the plates with an accuracy of 0.52% to 13%. The FE model was also able to predict the onset of damage initiation, evolution, and the subsequent reduction of the strength of the impacted laminates. The results obtained on the relationship of fibre geometry and varying incident impact energy on the impact damage modes can provide design guidance of S2/FM94 glass composites for aerospace applications where impact toughness is critical.
Original languageEnglish
Article number95
Number of pages25
JournalPolymers
Volume14
Issue number1
DOIs
Publication statusPublished - 27 Dec 2021

Keywords

  • S2/FM94
  • composites
  • low-velocity impact
  • finite element modelling
  • composite damage
  • computed tomography

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