Locating delaminations in laminated composite beams using nonlinear guided waves

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dc.contributor.authorSoleimanpour, R.
dc.contributor.authorNg, C.
dc.date.issued2017
dc.descriptionAvailable online 14 November 2016
dc.description.abstractThis paper proposes a new method for detecting and locating delaminations in laminated composite beams using nonlinear guided wave. It is shown that when incident wave interacts at the delamination, the nonlinear effect of wave interaction with contact interfaces at the delamination generates higher harmonic guided waves due to contact acoustic nonlinearity (CAN). The proposed method employs a transducer network to detect and locate the delamination using the higher harmonic guided waves. A sequential scan is used to inspect the laminated composite beams by actuating the fundamental anti-symmetric mode (A<inf>0</inf>) of guided wave at one of the transducers while the rest of the transducers are used for measuring the impinging waves. A series of numerical case studies are performed using three-dimensional explicit finite element simulations, which consider different delamination locations, lengths and through-thickness locations. Experimental case studies are carried out to further validate and demonstrate the capability of the proposed method. The results show that the proposed method is able to accurately detect and locate the delamination in the laminated composite beams using the higher harmonic guided waves. One of the advantages of the proposed method is that it does not rely on baseline data to detect and locate the delamination, and hence, it has less influence by varying operational and environmental conditions.
dc.description.statementofresponsibilityReza Soleimanpour, Ching-Tai Ng
dc.identifier.citationEngineering Structures, 2017; 131:207-219
dc.identifier.doi10.1016/j.engstruct.2016.11.010
dc.identifier.issn0141-0296
dc.identifier.issn1873-7323
dc.identifier.urihttp://hdl.handle.net/2440/103882
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160102233
dc.rights© 2016 Elsevier Ltd. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.engstruct.2016.11.010
dc.subjectNonlinear guided wave; Contact acoustic nonlinearity; Higher harmonic; Delamination; Laminated composite beam; Baseline-free method; Transducer network
dc.titleLocating delaminations in laminated composite beams using nonlinear guided waves
dc.typeJournal article
pubs.publication-statusPublished

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