Structural damage identification using multifunctional bragg grating sensors part I: theory and implementation

D. Betz, G.J. Thursby, B. Culshaw, W. Staszewski

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Structural health monitoring has become a respected and established discipline in engineering. Health monitoring involves the development of autonomous systems for continuous monitoring, inspection and damage detection of structures with minimum involvement of labour. The ultimate goal of structural health monitoring is to increase reliability, improve safety, enable light-weight design and reduce maintenance costs for all kinds of structures. The identification of structural damage is therefore a key issue in structural health monitoring. The scope of this paper is to present the results of testing a system for the identification of structural damage based on fibre Bragg grating sensors. The basic idea is to use fibre Bragg gratings as acoustic receivers of ultrasonic Lamb waves. The layout of such a damage identification system is introduced and its theoretical limits are studied numerically and experimentally. The set-up for damage identification experiments is described and the results of initial experiments introducing damage detection based on the analysis of Lamb wave signals are presented. The results for the Bragg grating sensors are then compared to the results of established technology for Lamb wave detection using piezoceramic transducers.
LanguageEnglish
Pages1305-1312
Number of pages7
JournalSmart Materials and Structures
Volume15
Issue number5
DOIs
Publication statusPublished - 2006

Fingerprint

Bragg gratings
Structural health monitoring
Surface waves
Damage detection
Fiber Bragg gratings
damage
Lamb waves
Acoustic receivers
structural health monitoring
sensors
Sensors
Monitoring
Ultrasonic waves
Transducers
Identification (control systems)
Inspection
Experiments
Health
Personnel
fibers

Keywords

  • structural health monitoring
  • autonomous systems
  • continuous monitoring
  • damage detection
  • safety
  • fibre Bragg grating sensors
  • ultrasonic Lamb waves
  • piezoceramic transducers

Cite this

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abstract = "Structural health monitoring has become a respected and established discipline in engineering. Health monitoring involves the development of autonomous systems for continuous monitoring, inspection and damage detection of structures with minimum involvement of labour. The ultimate goal of structural health monitoring is to increase reliability, improve safety, enable light-weight design and reduce maintenance costs for all kinds of structures. The identification of structural damage is therefore a key issue in structural health monitoring. The scope of this paper is to present the results of testing a system for the identification of structural damage based on fibre Bragg grating sensors. The basic idea is to use fibre Bragg gratings as acoustic receivers of ultrasonic Lamb waves. The layout of such a damage identification system is introduced and its theoretical limits are studied numerically and experimentally. The set-up for damage identification experiments is described and the results of initial experiments introducing damage detection based on the analysis of Lamb wave signals are presented. The results for the Bragg grating sensors are then compared to the results of established technology for Lamb wave detection using piezoceramic transducers.",
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Structural damage identification using multifunctional bragg grating sensors part I : theory and implementation. / Betz, D.; Thursby, G.J.; Culshaw, B.; Staszewski, W.

In: Smart Materials and Structures, Vol. 15, No. 5, 2006, p. 1305-1312.

Research output: Contribution to journalArticle

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AU - Thursby, G.J.

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AU - Staszewski, W.

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