Damage detection in bent plates using shear horizontal guided waves

Nakash Nazeer, Madis Ratassepp, Zheng Fan

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Study of the interaction of shear horizontal guided mode with defects in the bend region of an isotropic top hat stiffener is presented. Compared with the SH0 wave in a plate, the shear mode in the bend is dispersive and its wavefield characteristics are affected by the curvature of the bend. The scattering studies showed that the sensitivity of the wave to outer surface cracks in the bend increases with increasing frequency compared to inner surface cracks. Further numerical simulations demonstrated that the shear mode is sensitive to the delamination in the bend due to non-zero transverse shear stress. Results of finite element modeling were validated by experiments and reasonably good agreements were obtained.
Original languageEnglish
Pages (from-to)155-163
JournalUltrasonics
Volume75
DOIs
Publication statusPublished - Mar 2017
Externally publishedYes

Keywords

  • Shear horizontal mode
  • Defect scattering
  • Curvature effect

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