Damage investigation and assessment due to low-velocity impact on flax/glass hybrid composite plates

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Abstract

There are limited information available in the body of knowledge regarding to the low velocity impact damage characteristics of sustainable bio-based such as flax fibre reinforced composites. This paper presents the results of full investigation of impact damage mechanisms on flax/vinyl ester laminated composite and flax-glass/vinyl ester hybrid composite laminates caused by low-velocity impact using a drop weight impact machine. The specimens were subjected to incident energy levels of 25 J and 50 J, in order to achieve a damage up to perforation and complete penetration. A 3D Finite Element Analysis (FEA) model was also developed using Hashin failure criteria. The damage and the predicted delaminations were compared using a high-resolution micro-Computed Tomography (μ-CT) technique. The results of the numerical analysis correlated well with the experiments and the imaging, which provided a full verification of the exact position of delaminations due to impact within the composite laminates.
Original languageEnglish
Article number111224
Number of pages11
JournalComposite Structures
Volume226
Early online date10 Jul 2019
DOIs
Publication statusPublished - Oct 2019

Keywords

  • Low-velocity impact
  • natural fibre composites
  • finite element analysis
  • delamination
  • μ-CT imaging

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