Rayleigh Spectroscopy For Characterizing Surface Cracks

Testa, A. J.; Bürger, Christian

doi:10.1007/978-1-4684-4262-5_70

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…1 Surface waves are suitable for testing structure surfaces or interfaces between materials. 2,3 However, these techniques are limited to short-range inspection, and are quite time consuming for testing large structures. Guided waves like Lamb modes or SH waves are more appropriate when large structures are to be controlled.…”

Section: Introductionmentioning

confidence: 99%

Modal decomposition method for modeling the interaction of Lamb waves with cracks

Castaings

Clézio

Hosten

2002

The Journal of the Acoustical Society of America

161

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The interaction of the low-order antisymmetric (a0) and symmetric (s0) Lamb waves with vertical cracks in aluminum plates is studied. Two types of slots are considered: (a) internal crack symmetrical with respect to the middle plane of the plate and (b) opening crack. The modal decomposition method is used to predict the reflection and transmission coefficients and also the through-thickness displacement fields on both sides of slots of various heights. The model assumes strip plates and cracks, thus considering two-dimensional plane strain conditions. However, mode conversion (a0 into s0 and vice versa) that occurs for single opening cracks is considered. The energy balance is always calculated from the reflection and transmission coefficients, in order to check the validity of the results. These coefficients together with the through-thickness displacement fields are also compared to those predicted using a finite element code widely used in the past for modeling Lamb mode diffraction problems. Experiments are also made for measuring the reflection and transmission coefficients for incident a0 or s0 lamb modes on opening cracks, and compared to the numerical predictions.

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Section: Introductionmentioning

confidence: 99%

Modal decomposition method for modeling the interaction of Lamb waves with cracks

Castaings

Clézio

Hosten

2002

The Journal of the Acoustical Society of America

161

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“…The interference of Rayleigh wave signals diffracted from crack tips have also been used to size surface-breaking cracks [84]. In addition, the change in spectral content of a Rayleigh wave that has had the high-frequency (near-surface) components preferentially absorbed by propagating past a crack has been used effectively [85][86][87].…”

Section: Advanced Techniques For Detecting and Sizing Flawsmentioning

confidence: 99%

Quantitative Ultrasonic Nondestructive Evaluation Methods

Thompson

1983

Journal of Applied Mechanics

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Quantitative ultrasonic techniques for determining the serviceability of structural components are reviewed. Particular emphasis is placed on the use of forward and inverse elastic wave scattering theory as a fundamental foundation for predicting such engineering parameters as the probability of flaw detection and for developing improved techniques for flaw sizing. Ultrasonic measurement techniques for the determination of distributed failure-related properties such as residual stresses are discussed, and the status of the prediction of failure by the detection of acoustic emission precursors is reviewed.

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