Residual stress effects of a fatigue crack on guided lamb waves

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  1. Available on September 4, 2018
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DOIResolve DOI: http://doi.org/10.1088/1361-665X/aa8a0c
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TypeArticle
Journal titleSmart Materials and Structures
ISSN0964-1726
1361-665X
AbstractStructural health monitoring has focused on the use of computational models to capture the effect of crack-like discontinuities on the behaviour of acoustic-ultrasonic signals. However, few models have taken into account the effect of geometric complexity in combination with residual stresses generated during the fatigue crack growth process. In this study, a finite element analysis model of a C-channel type aeronautical structure is evaluated under a pitch-catch scenario. Three different finite element model configurations were considered in order to understand the effects that residual stresses of a fatigue crack emanating from a through-hole have on the guided Lamb wave propagation behaviour. The results demonstrate that numerical modelling is able to capture the change in amplitude and the effect of a phase shift on the guided Lamb wave behaviour due to the presence of the discontinuity and the stress field generated during the fatigue crack growth process.
Publication date
PublisherIOP Publishing
LanguageEnglish
AffiliationNational Research Council Canada; Aerospace
Peer reviewedYes
NPARC number23002233
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Record identifier5a0dd84c-474b-49cc-a59d-a856f096162f
Record created2017-09-12
Record modified2017-09-12
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