Computational study of scattering elastic waves due to a teredo marine borer-like cylindrical defect embedded in an isotropic solid cylinder

Ahmed Murgab Mohammed Mahil, Wing Kong Chiu, Benjamin Vien

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

Abstract

This paper showcases a quantitative investigation of scattering of ultrasonic waves experiences when impinging on a cylindrical defect inside a solid cylinder. Such cylindrical bores reduce the structural capacity of the cylinder, these defects constitute an even greater risk as they cannot be observed from the surface. The focal point investigated herein is to develop a better understanding of the wave’s scattering when interacting with defects of cylindrical bore, mimicking the Teredo marine borer, within the solid cylinder. Two-dimensional Finite Element simulations are carried out using ABAQUS software. A 200 kHz 5.5 cycle Hann windowed excitation on an isotropic cylinder is simulated a point source excitation at the circumference of the cylinder is used. The scattering wave fields from a range of defect diameters through the solid cylinder are presented. Using Two-Dimensional Fast Fourier Transform, the wave mode and velocity of the scattered wavefield along various directions was identified in cylindrical coordinates, to decouple the wave modes. Computational results are presented for the scattering pattern as a function of cylindrical bore diameter size relative to wavelength. This study serves as an efficient approach when choosing an input for ultrasonic imaging, with the aim to obtain high fidelity imaging resolution for structural health monitoring applications.

Original languageEnglish
Title of host publicationStructural Health Monitoring - 8th Asia Pacific Workshop on Structural Health Monitoring, 8APWSHM 2020, proceedings
EditorsN. Rajic, M. Veidt, A. Mita, N. Takeda, W.K. Chiu
PublisherAssociation of American Publishers
Pages105-112
Number of pages8
ISBN (Print)9781644901304
DOIs
Publication statusPublished - 2021
EventAsia-Pacific Workshop on Structural Health Monitoring 2020 - Cairns, Australia
Duration: 9 Dec 202011 Dec 2020
Conference number: 8th
https://www.monash.edu/engineering/shm (Website)

Publication series

NameMaterials Research Proceedings
Volume18
ISSN (Print)2474-3941
ISSN (Electronic)2474-395X

Conference

ConferenceAsia-Pacific Workshop on Structural Health Monitoring 2020
Abbreviated titleAPWSHM 2020
Country/TerritoryAustralia
CityCairns
Period9/12/2011/12/20
Internet address

Keywords

  • Bulk Waves
  • Cylindrical Defect
  • Finite Element Analysis
  • Group Velocity
  • Scattered Field

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