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Elastic waves in fibre composite laminates

Green1, Green

  • 1Mathematical Sciences Department, Loughborough University, Leics, UK. w.a.green@lboro.ac.uk

Ultrasonics
|June 1, 2000
PubMed
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This study models elastic wave propagation in laminates from dislocation sources. Numerical inversion reveals Rayleigh-Lamb wave modes contributing to the laminate

Area of Science:

  • Solid Mechanics
  • Materials Science
  • Wave Propagation

Background:

  • Composite laminates are crucial in aerospace and automotive industries.
  • Understanding elastic wave propagation is key to structural integrity analysis.

Purpose of the Study:

  • To analyze elastic wave propagation in an eight-ply quasi-isotropic laminate.
  • To investigate the effects of line dislocation sources on wave behavior.

Main Methods:

  • Laplace and Fourier transforms were used to solve elastodynamic equations.
  • A system of six first-order differential equations was solved for each layer.
  • Numerical inversion of the double transform was employed to recover time-history responses.

Main Results:

Related Experiment Videos

  • The study successfully obtained transforms of displacement and stress components.
  • Time histories of surface displacement were calculated at various distances from sources.
  • Contributions of individual Rayleigh-Lamb wave modes to the overall response were visualized.

Conclusions:

  • The methodology provides a comprehensive approach to analyzing wave propagation in layered composites.
  • The findings offer insights into the complex behavior of elastic waves generated by dislocations.
  • This research aids in predicting material response and potential failure mechanisms in laminate structures.