Predictive numerical simulation of lamb wave scattering from a wing skin defect for structural health monitoring system design

Nik Rajic, C. Rosalie, W. Ong, W. K. Chiu

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

2 Citations (Scopus)


This paper reports on an investigation into the accuracy of numerical finite element simulations of elastic wave scattering from a structural defect in a metallic wing skin component. The work forms part of a broader research program that seeks to develop a validated predictive modelling capability for optimal design of acousto-ultrasonic systems for health monitoring of structural hot spots. The present investigation examines the efficacy of simplified representations of the acoustic transduction process whereby piezoelectric coupling is replaced by a set of traction forces with appropriate time modulation. The motivation for the work is the prospect of a significant gain in computational efficiency. Several different approximation schemes are considered and assessed on the basis of how closely the resulting simulations match experimental observations of the scattered field. Some of the approximation schemes are shown to produce simulation results with an accuracy comparable to that of a piezoelectrically coupled solution, suggesting that improved computational efficiency can be achieved without compromising simulation accuracy.

Original languageEnglish
Title of host publication6th European Workshop on Structural Health Monitoring 2012, EWSHM 2012
Subtitle of host publicationDresden, Germany 3 - 6 July 2012
PublisherNDT Internet Publishing
Number of pages9
ISBN (Electronic)9783940283412
ISBN (Print)9781510829480
Publication statusPublished - 2012
EventEuropean Workshop on Structural Health Monitoring 2012 - Dresden, Germany
Duration: 3 Jul 20126 Jul 2012
Conference number: 6th


ConferenceEuropean Workshop on Structural Health Monitoring 2012
Abbreviated titleEWSHM 2012

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