2014
DOI: 10.1121/1.4869684
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The interaction of Rayleigh waves with delaminations in composite laminates

Abstract: In the present work, the interaction of Rayleigh waves with a delamination in a fiber reinforced composite plate was analyzed. Rayleigh waves, upon interacting with delamination mode, convert into Lamb waves in the delamination zone. These guided Lamb modes have the capability to mode convert back into Rayleigh modes when they interact with the edge of the delamination. A unidirectional glass/epoxy laminate with a delamination of known size was fabricated and tested using air-coupled ultrasonics. Finite elemen… Show more

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Cited by 24 publications
(21 citation statements)
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“…The wavelength is the relative measure to determine if the spar-core is a half-space. This type of mode conversion from Rayleigh waves to Lamb waves and vice versa has been documented both numerically and experimentally [13,14]. http Rayleigh wave interaction with surface and sub-surface defects is well documented in the literature [15][16][17][18].…”
Section: Introductionmentioning
confidence: 92%
See 1 more Smart Citation
“…The wavelength is the relative measure to determine if the spar-core is a half-space. This type of mode conversion from Rayleigh waves to Lamb waves and vice versa has been documented both numerically and experimentally [13,14]. http Rayleigh wave interaction with surface and sub-surface defects is well documented in the literature [15][16][17][18].…”
Section: Introductionmentioning
confidence: 92%
“…Notch analysis was performed by varying the length of the notch and studying the reflection and transmission factors. The approach and FE modeling used in the current study is very similar to the approach used earlier by the authors [11,12,14] to observe good experiment-numerical correlation. Hence, the confidence in the numerical results is at the same level as that for the previous published works.…”
Section: Introductionmentioning
confidence: 93%
“…Shkerdin and Glorieux [14] used an analytical method to study Lamb mode conversion at delaminations in plates, focusing on the influence of the size and location of the delamination on the scattering coefficients. Chakrapani and Dayal [15] studied Rayleigh to Lamb mode conversion in a laminate numerically and experimentally, and proposed that the size and location of the delamination can be identified through a comprehensive analysis of the wave signals. A similar study has been performed by Tian et al [16] using a frequency-wavenumber domain analysis approach.…”
Section: Introductionmentioning
confidence: 99%
“…ACUS and LUT, both, are useful for Lamb wave applications for plates (270), rods (271), and tubes (267,272), or surface (Rayleigh) waves (273). The combination of recording guided ultrasonic waves with numerical backcalculation of wave propagation for detecting indications of defects in PMC pipes also looks promising (274).…”
Section: Sonic and Ultrasonic Test Methodsmentioning
confidence: 98%