Damage assessment of NCF, 2D and 3D Woven Composites under Compression After Multiple-Impact using Acoustic Emission

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Abstract

This study is devoted to the damage characterization of Non-Crimp Fabric (NCF), 2D plain-woven (2D-PW) and 3D orthogonal plain-woven (ORT-PW) carbon/epoxy laminates, subjected to compression after multiple-impact loading, using Acoustic Emission (AE). The ultrasonic C-scan images showed that the interlaminar damage area induced by the single and 3-impact in ORT-PW architecture is 3 and 2 times smaller than NCF and 2D-PW architectures respectively. The impacted specimens were then subjected to the in-plane compression load. Two indices, one based on the mechanical response and another one based on the AE behavior of the laminates, were proposed to compare the performance of different architectures. These indices showed that the ORT-PW had the best performance among all the architectures. Finally, AE was used to distinguish the different damage mechanisms including: matrix cracking, intra and inter-yarn debonding, defected-fiber breakage, intact-fiber breakage and z-binder fiber breakage in the CAI tests of the architectures.
Original languageEnglish
Article number105833
Pages (from-to)105833
Number of pages15
JournalComposites Part A: Applied Science and Manufacturing
Volume132
DOIs
Publication statusPublished - May 2020

Keywords

  • Carbon fibers
  • 3-Dimensional reinforcement
  • Acoustic emission
  • Compression after impact
  • A. Carbon fibers
  • B. Compression after impact
  • A. 3-Dimensional reinforcement
  • D. Acoustic emission

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