Inversion technique for an all-optical inspection of materials' elastic properties

B.L. Sorazu, B. Culshaw, S.H. Atique

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

In this paper we present a complete non-contact, all-optical inspection tool, for the extraction of the principal mechanical characteristics of plate-like structural materials (effective stiffness, Poisson ratio and plate's thickness). Broadband ultrasonic guided waves - Lamb waves - are optically generated and detected for incremental source detector distances. A two dimensional Fourier transform is applied to these measured time signals in order to extract dispersion information, which is highly affected by elastic properties as well as by sample geometry. The elastic properties and thickness of the structure under test are obtained from this experimentally extracted dispersion information, by an inversion technique which is presented and analysed in the paper. These values are verified with a complementary experiment. Monitoring changes in the estimated material properties could be used to indicate changes in the structural condition.

Conference

ConferenceSPIE Smart Structures and Materials 2006
CountryUnited States
CitySan Diego, CA
Period27/02/0627/02/06

Fingerprint

inspection
elastic properties
inversions
time signals
Lamb waves
Poisson ratio
stiffness
ultrasonics
broadband
detectors
geometry

Keywords

  • mechanical characteristics
  • lamb waves
  • inversion technique
  • optical

Cite this

Sorazu, B. L., Culshaw, B., & Atique, S. H. (2006). Inversion technique for an all-optical inspection of materials' elastic properties. Paper presented at SPIE Smart Structures and Materials 2006, San Diego, CA, United States. https://doi.org/dx.doi.org/10.1117/12.658433
Sorazu, B.L. ; Culshaw, B. ; Atique, S.H. / Inversion technique for an all-optical inspection of materials' elastic properties. Paper presented at SPIE Smart Structures and Materials 2006, San Diego, CA, United States.
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Sorazu, BL, Culshaw, B & Atique, SH 2006, 'Inversion technique for an all-optical inspection of materials' elastic properties' Paper presented at SPIE Smart Structures and Materials 2006, San Diego, CA, United States, 27/02/06 - 27/02/06, . https://doi.org/dx.doi.org/10.1117/12.658433

Inversion technique for an all-optical inspection of materials' elastic properties. / Sorazu, B.L.; Culshaw, B.; Atique, S.H.

2006. Paper presented at SPIE Smart Structures and Materials 2006, San Diego, CA, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Inversion technique for an all-optical inspection of materials' elastic properties

AU - Sorazu, B.L.

AU - Culshaw, B.

AU - Atique, S.H.

PY - 2006/3/30

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N2 - In this paper we present a complete non-contact, all-optical inspection tool, for the extraction of the principal mechanical characteristics of plate-like structural materials (effective stiffness, Poisson ratio and plate's thickness). Broadband ultrasonic guided waves - Lamb waves - are optically generated and detected for incremental source detector distances. A two dimensional Fourier transform is applied to these measured time signals in order to extract dispersion information, which is highly affected by elastic properties as well as by sample geometry. The elastic properties and thickness of the structure under test are obtained from this experimentally extracted dispersion information, by an inversion technique which is presented and analysed in the paper. These values are verified with a complementary experiment. Monitoring changes in the estimated material properties could be used to indicate changes in the structural condition.

AB - In this paper we present a complete non-contact, all-optical inspection tool, for the extraction of the principal mechanical characteristics of plate-like structural materials (effective stiffness, Poisson ratio and plate's thickness). Broadband ultrasonic guided waves - Lamb waves - are optically generated and detected for incremental source detector distances. A two dimensional Fourier transform is applied to these measured time signals in order to extract dispersion information, which is highly affected by elastic properties as well as by sample geometry. The elastic properties and thickness of the structure under test are obtained from this experimentally extracted dispersion information, by an inversion technique which is presented and analysed in the paper. These values are verified with a complementary experiment. Monitoring changes in the estimated material properties could be used to indicate changes in the structural condition.

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KW - optical

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Sorazu BL, Culshaw B, Atique SH. Inversion technique for an all-optical inspection of materials' elastic properties. 2006. Paper presented at SPIE Smart Structures and Materials 2006, San Diego, CA, United States. https://doi.org/dx.doi.org/10.1117/12.658433