Structural health monitoring of fatigue crack growth in plate structures with ultrasonic guided waves

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Fatigue crack growth in plate structures is monitored with ultrasonic guided waves generated from piezoelectric transducers. Cracks initiate in the vicinity of fastener holes due to cyclic in-plane loading. Ultrasonic guided waves that are partially obstructed by the fastener holes are investigated. Since fatigue crack growth increases the obstruction, these waves are effective for monitoring fatigue crack growth in a pitch-catch mode. The transmission coefficient (TC), which is defined essentially as the current-to-baseline amplitude ratio, and the transmission coefficient ratio (TCR), which is based on amplitude ratios from a single wave, are signal features used for crack characterization. The TCR is well suited for structural health monitoring. The excellent agreement between experimental results and finite element analysis of wave propagation corroborates the experiments. A sparse array of transducers is shown to effectively monitor a multifastener joint. The approach using obstructed ultrasonic guided waves has strong potential for prognostics-based structural health management due to the linear relationship between crack size and the TC.

Original languageEnglish (US)
Pages (from-to)393-404
Number of pages12
JournalStructural Health Monitoring
Volume11
Issue number4
DOIs
StatePublished - Jul 1 2012

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Growth Plate
Guided electromagnetic wave propagation
Structural health monitoring
Ultrasonic waves
Fatigue crack propagation
Fatigue
Transducers
Fasteners
Health
Cracks
Finite Element Analysis
Growth
Piezoelectric transducers
Joints
Wave propagation
Finite element method
Ultrasonic Waves
Monitoring
Experiments

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Mechanical Engineering

Cite this

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abstract = "Fatigue crack growth in plate structures is monitored with ultrasonic guided waves generated from piezoelectric transducers. Cracks initiate in the vicinity of fastener holes due to cyclic in-plane loading. Ultrasonic guided waves that are partially obstructed by the fastener holes are investigated. Since fatigue crack growth increases the obstruction, these waves are effective for monitoring fatigue crack growth in a pitch-catch mode. The transmission coefficient (TC), which is defined essentially as the current-to-baseline amplitude ratio, and the transmission coefficient ratio (TCR), which is based on amplitude ratios from a single wave, are signal features used for crack characterization. The TCR is well suited for structural health monitoring. The excellent agreement between experimental results and finite element analysis of wave propagation corroborates the experiments. A sparse array of transducers is shown to effectively monitor a multifastener joint. The approach using obstructed ultrasonic guided waves has strong potential for prognostics-based structural health management due to the linear relationship between crack size and the TC.",
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Structural health monitoring of fatigue crack growth in plate structures with ultrasonic guided waves. / Cho, Hwanjeong; Lissenden, III, Clifford Jesse.

In: Structural Health Monitoring, Vol. 11, No. 4, 01.07.2012, p. 393-404.

Research output: Contribution to journalArticle

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