Wave interaction with nonlinear damage and generation of harmonics in composite structures

R. K. Apalowo*, D. Chronopoulos, S. Cantero-Chinchilla

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

1 Citation (Scopus)

Abstract

This work presents a generic Finite Element (FE) based computational scheme for quantifying guided wave interaction with Localised Nonlinear Structural Damage (LNSD) within structures of arbitrary layering and geometric complexity. The through-thickness mode-shape of the structure is obtained through a wave and finite element method. This is applied in a time domain FE simulation in order to generate time harmonic excitation for a specific wave mode. Interaction of the wave with LNSD within the system is computed through an element activation and deactivation iteration. The scheme is validated against experimental measurements and a WFE-FE methodology for calculating wave interaction with damage. Case studies for guided wave interaction with crack and delamination are presented to exhibit the robustness of the proposed method in classifying and identifying damage.

Original languageEnglish
Article number111495
JournalComposite Structures
Volume230
DOIs
Publication statusPublished - 15 Dec 2019

Keywords

  • Composite structures
  • Finite element modelling
  • Nonlinear ultrasound
  • Wave finite element method
  • Wave interaction with nonlinear damage

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