Wave propagation in composite materials with fibre waviness

Shi Chang Wooh*, Isaac M Daniel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

A discrete ray tracing model based on elastodynamic ray theory was developed and applied to a composite material with fibre waviness. The varying anisotropy of this composite causes the ultrasonic waves to travel along curved paths. Particular attention was paid to the comparison with experimental measurements in order to check the applicability of the method for non-destructive characterization of fibre waviness, especially in the high frequency regime. A specimen with intentional fibre waviness was fabricated by winding prepreg tape around a specially designed mandrel. The specimen was tested in the through-transmission mode using special ultrasonic techniques for thick composites. The theoretical model and experimental results agree, at least with regard to the period of fibre waviness.

Original languageEnglish (US)
Pages (from-to)3-10
Number of pages8
JournalUltrasonics
Volume33
Issue number1
DOIs
StatePublished - Jan 1 1995

Keywords

  • anisotropy
  • composite materials
  • fibre waviness
  • ultrasonic ray tracing
  • wave velocity

ASJC Scopus subject areas

  • Medicine(all)
  • Acoustics and Ultrasonics

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