Fibre direction and stacking sequence measurement in carbon fibre composites using Radon transforms of ultrasonic data

L. J. Nelson*, R. A. Smith

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

10 Citations (Scopus)
125 Downloads (Pure)

Abstract

Stacking sequence and, more generally, fibre orientation, are critical parameters in fibrous composite materials since they govern mechanical performance. This paper presents a method, based on the ultrasonic pulse-echo non-destructive technique, that can map the stacking sequence in unidirectional carbon-fibre composites. In-plane fibre orientation is measured using a Radon-transform method applied to local 2D images extracted from the 3D dataset formed from a 2D scan of pulse-echo responses. The ability to align these local 2D images to the plies in the region being assessed makes this technique suitable even in laminates where out-of-plane ply wrinkling is present. The Radon-transform method is shown to provide interpretable stacking-sequence maps, allowing ply lay-up sequence and both in-plane waviness and out-of-plane wrinkling to be visualised and quantified.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume118
Early online date11 Dec 2018
DOIs
Publication statusPublished - Mar 2019

Keywords

  • Layered structures
  • Directional orientation
  • Non-destructive testing
  • Ultrasonics

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