Novel methods of Lamb wave detection for material damage detection and location

G.J. Thursby, B.L. Sorazu, D. Betz, B. Culshaw

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

We describe and compare two novel methods of detecting ultrasonic Lamb waves used for damage detection and location, and then go on to compare their characteristics with those of more conventional PZT transducers. The two methods are measurements of the change in polarization state of the light in an optical fibre and the changes in reflected power from a fibre Bragg grating. Since different transducers measure different properties of Lamb waves by different methods, their relative sensitivities to the S0 and A0 modes can also vary. This can be of interest because, for instance, the A0 mode is more sensitive to the presence of delaminations in a sheet due to the larger shear strain component that this mode contains. We also describe the directional properties of the sensors and demonstrate the ways in which these can be used to advantage in the detection and location of damage.

Conference

ConferenceSPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring
Period9/05/05 → …

Fingerprint

Lamb waves
damage
transducers
shear strain
Bragg gratings
ultrasonics
optical fibers
fibers
sensitivity
sensors
polarization

Keywords

  • ultrasonic Lamb waves
  • material damage detection
  • polarimetric detection
  • fibre bragg gratings
  • ultrasound

Cite this

Thursby, G. J., Sorazu, B. L., Betz, D., & Culshaw, B. (2005). Novel methods of Lamb wave detection for material damage detection and location. 313 - 222. Paper presented at SPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, . https://doi.org/10.1117/12.600545
Thursby, G.J. ; Sorazu, B.L. ; Betz, D. ; Culshaw, B. / Novel methods of Lamb wave detection for material damage detection and location. Paper presented at SPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, .10 p.
@conference{eb465c343d5847279db5a4f7f5e7efb7,
title = "Novel methods of Lamb wave detection for material damage detection and location",
abstract = "We describe and compare two novel methods of detecting ultrasonic Lamb waves used for damage detection and location, and then go on to compare their characteristics with those of more conventional PZT transducers. The two methods are measurements of the change in polarization state of the light in an optical fibre and the changes in reflected power from a fibre Bragg grating. Since different transducers measure different properties of Lamb waves by different methods, their relative sensitivities to the S0 and A0 modes can also vary. This can be of interest because, for instance, the A0 mode is more sensitive to the presence of delaminations in a sheet due to the larger shear strain component that this mode contains. We also describe the directional properties of the sensors and demonstrate the ways in which these can be used to advantage in the detection and location of damage.",
keywords = "ultrasonic Lamb waves , material damage detection , polarimetric detection, fibre bragg gratings, ultrasound",
author = "G.J. Thursby and B.L. Sorazu and D. Betz and B. Culshaw",
year = "2005",
month = "5",
day = "13",
doi = "10.1117/12.600545",
language = "English",
pages = "313 -- 222",
note = "SPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring ; Conference date: 09-05-2005",

}

Thursby, GJ, Sorazu, BL, Betz, D & Culshaw, B 2005, 'Novel methods of Lamb wave detection for material damage detection and location' Paper presented at SPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, 9/05/05, pp. 313 - 222. https://doi.org/10.1117/12.600545

Novel methods of Lamb wave detection for material damage detection and location. / Thursby, G.J.; Sorazu, B.L.; Betz, D.; Culshaw, B.

2005. 313 - 222 Paper presented at SPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Novel methods of Lamb wave detection for material damage detection and location

AU - Thursby, G.J.

AU - Sorazu, B.L.

AU - Betz, D.

AU - Culshaw, B.

PY - 2005/5/13

Y1 - 2005/5/13

N2 - We describe and compare two novel methods of detecting ultrasonic Lamb waves used for damage detection and location, and then go on to compare their characteristics with those of more conventional PZT transducers. The two methods are measurements of the change in polarization state of the light in an optical fibre and the changes in reflected power from a fibre Bragg grating. Since different transducers measure different properties of Lamb waves by different methods, their relative sensitivities to the S0 and A0 modes can also vary. This can be of interest because, for instance, the A0 mode is more sensitive to the presence of delaminations in a sheet due to the larger shear strain component that this mode contains. We also describe the directional properties of the sensors and demonstrate the ways in which these can be used to advantage in the detection and location of damage.

AB - We describe and compare two novel methods of detecting ultrasonic Lamb waves used for damage detection and location, and then go on to compare their characteristics with those of more conventional PZT transducers. The two methods are measurements of the change in polarization state of the light in an optical fibre and the changes in reflected power from a fibre Bragg grating. Since different transducers measure different properties of Lamb waves by different methods, their relative sensitivities to the S0 and A0 modes can also vary. This can be of interest because, for instance, the A0 mode is more sensitive to the presence of delaminations in a sheet due to the larger shear strain component that this mode contains. We also describe the directional properties of the sensors and demonstrate the ways in which these can be used to advantage in the detection and location of damage.

KW - ultrasonic Lamb waves

KW - material damage detection

KW - polarimetric detection

KW - fibre bragg gratings

KW - ultrasound

U2 - 10.1117/12.600545

DO - 10.1117/12.600545

M3 - Paper

SP - 313

EP - 222

ER -

Thursby GJ, Sorazu BL, Betz D, Culshaw B. Novel methods of Lamb wave detection for material damage detection and location. 2005. Paper presented at SPIE 15th Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, . https://doi.org/10.1117/12.600545