Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/111066
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Implication of changing loading conditions on structural health monitoring utilising guided waves
Author: Mohabuth, M.
Kotousov, A.
Ng, C.-.T.
Rose, L.
Citation: Smart Materials and Structures, 2018; 27(2):025003-1-025003-12
Publisher: IOP Publishing
Issue Date: 2018
ISSN: 0964-1726
1361-665X
Statement of
Responsibility: 
Munawwar Mohabuth, Andrei Kotousov, Ching-Tai Ng and LR Francis Rose
Abstract: Structural health monitoring systems based on guided waves typically utilise a network of embedded or permanently attached sensors, allowing for the continuous detection of damage remote from a sensor location. The presence of damage is often diagnosed by analysing the residual signals from the structure after subtracting damage-free reference data. However, variations in environmental and operational conditions such as temperature, humidity, applied or thermally-induced stresses affect the measured residuals. A previously developed acoustoelastic formulation is here extended and employed as the basis for a simplified analytical model to estimate the effect of applied or thermally-induced stresses on the propagation characteristics of the fundamental Lamb wave modes. It is noted that there are special combinations of frequency, biaxial stress ratio and direction of wave propagation for which there is no change in the phase velocity of the fundamental anti-symmetric mode. The implication of these results in devising effective strategies to mitigate the effect of stress induced variations in guided-wave damage diagnostics is briefly discussed.
Keywords: Structural health monitoring; damage detection; acoustoelasticity; Lamb waves; environment and operational conditions; stress mitigation
Rights: © 2018 IOP Publishing Ltd
RMID: 0030080567
DOI: 10.1088/1361-665X/aa9f89
Grant ID: http://purl.org/au-research/grants/arc/DP160102233
Appears in Collections:Medicine publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.