An acoustic nonlinearity measurement technique with built-in couplant effect elimination

L. Sun; S. S. Kulkarni; B. Moran; S. Krishnaswamy; J. D. Achenbach

doi:10.1117/12.598058

An acoustic nonlinearity measurement technique with built-in couplant effect elimination

L. Sun^*, S. S. Kulkarni, B. Moran, S. Krishnaswamy, J. D. Achenbach

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

Abstract

A modified technique to measure acoustic nonlinearity in fatigued components is proposed in this paper. As opposed to the conventional technique to measure acoustic nonlinearity, the proposed technique eliminates the couplant effects between the transducers and the specimen. The proposed technique is compared with the conventional technique by performing nonlinearity measurements on a fatigued aluminum alloy specimen and calculating the coefficient of variation (COV) of the nonlinearity parameter. Preliminary results show that the COV of the nonlinearity parameter obtained using the modified technique is approximately half of that obtained using conventional technique. It is therefore felt that the proposed technique will help to reduce the variability in the nonlinearity measurements in fatigued components.

Original language	English (US)
Article number	42
Pages (from-to)	363-368
Number of pages	6
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5768
DOIs	https://doi.org/10.1117/12.598058
State	Published - 2005
Externally published	Yes
Event	Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV - San Diego, CA, United States Duration: Mar 7 2005 → Mar 9 2005

Keywords

Couplant effect elimination
Fatigue
Nonlinearity measurements

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.598058

Cite this

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title = "An acoustic nonlinearity measurement technique with built-in couplant effect elimination",

abstract = "A modified technique to measure acoustic nonlinearity in fatigued components is proposed in this paper. As opposed to the conventional technique to measure acoustic nonlinearity, the proposed technique eliminates the couplant effects between the transducers and the specimen. The proposed technique is compared with the conventional technique by performing nonlinearity measurements on a fatigued aluminum alloy specimen and calculating the coefficient of variation (COV) of the nonlinearity parameter. Preliminary results show that the COV of the nonlinearity parameter obtained using the modified technique is approximately half of that obtained using conventional technique. It is therefore felt that the proposed technique will help to reduce the variability in the nonlinearity measurements in fatigued components.",

keywords = "Couplant effect elimination, Fatigue, Nonlinearity measurements",

author = "L. Sun and Kulkarni, {S. S.} and B. Moran and S. Krishnaswamy and Achenbach, {J. D.}",

year = "2005",

doi = "10.1117/12.598058",

language = "English (US)",

volume = "5768",

pages = "363--368",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV ; Conference date: 07-03-2005 Through 09-03-2005",

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T1 - An acoustic nonlinearity measurement technique with built-in couplant effect elimination

AU - Sun, L.

AU - Kulkarni, S. S.

AU - Moran, B.

AU - Krishnaswamy, S.

AU - Achenbach, J. D.

PY - 2005

Y1 - 2005

N2 - A modified technique to measure acoustic nonlinearity in fatigued components is proposed in this paper. As opposed to the conventional technique to measure acoustic nonlinearity, the proposed technique eliminates the couplant effects between the transducers and the specimen. The proposed technique is compared with the conventional technique by performing nonlinearity measurements on a fatigued aluminum alloy specimen and calculating the coefficient of variation (COV) of the nonlinearity parameter. Preliminary results show that the COV of the nonlinearity parameter obtained using the modified technique is approximately half of that obtained using conventional technique. It is therefore felt that the proposed technique will help to reduce the variability in the nonlinearity measurements in fatigued components.

AB - A modified technique to measure acoustic nonlinearity in fatigued components is proposed in this paper. As opposed to the conventional technique to measure acoustic nonlinearity, the proposed technique eliminates the couplant effects between the transducers and the specimen. The proposed technique is compared with the conventional technique by performing nonlinearity measurements on a fatigued aluminum alloy specimen and calculating the coefficient of variation (COV) of the nonlinearity parameter. Preliminary results show that the COV of the nonlinearity parameter obtained using the modified technique is approximately half of that obtained using conventional technique. It is therefore felt that the proposed technique will help to reduce the variability in the nonlinearity measurements in fatigued components.

KW - Couplant effect elimination

KW - Fatigue

KW - Nonlinearity measurements

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

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T2 - Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV

Y2 - 7 March 2005 through 9 March 2005

ER -

An acoustic nonlinearity measurement technique with built-in couplant effect elimination

Abstract

Keywords

ASJC Scopus subject areas

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