Modal content-based damage indicators for disbonds in adhesively bonded composite structures

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Adhesive bonding is a promising joining method for composite materials. This article focuses on the use of modal content-based damage indicators to improve the sensitivity of guided waves to disbonds in the adhesive. Wave-defect interaction is modeled using frequency-domain finite element analysis in order to identify modes sensitive to adhesive degradation in joints between carbon fiber–reinforced polymer laminates. Phased array transducers and multielement array sensors designed for structural health monitoring are employed to enable preferential mode excitation and modal content extraction, respectively. The domains in dispersion curve space predicted to have good, intermediate, and no sensitivity to disbond were experimentally found to have good, intermediate, and limited sensitivity using a feature of the received signals associated with the modal amplitude or a modal amplitude ratio. Furthermore, the modal amplitude was found to decrease monotonically with increasing disbond size, demonstrating that it has potential to quantitatively size disbonds.

Original languageEnglish (US)
Pages (from-to)491-504
Number of pages14
JournalStructural Health Monitoring
Volume15
Issue number5
DOIs
StatePublished - Sep 1 2016

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Composite structures
Adhesives
Finite Element Analysis
Guided electromagnetic wave propagation
Structural health monitoring
Sensor arrays
Transducers
Joining
Laminates
Polymers
Carbon
Joints
Finite element method
Degradation
Defects
Health
Composite materials

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Mechanical Engineering

Cite this

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abstract = "Adhesive bonding is a promising joining method for composite materials. This article focuses on the use of modal content-based damage indicators to improve the sensitivity of guided waves to disbonds in the adhesive. Wave-defect interaction is modeled using frequency-domain finite element analysis in order to identify modes sensitive to adhesive degradation in joints between carbon fiber–reinforced polymer laminates. Phased array transducers and multielement array sensors designed for structural health monitoring are employed to enable preferential mode excitation and modal content extraction, respectively. The domains in dispersion curve space predicted to have good, intermediate, and no sensitivity to disbond were experimentally found to have good, intermediate, and limited sensitivity using a feature of the received signals associated with the modal amplitude or a modal amplitude ratio. Furthermore, the modal amplitude was found to decrease monotonically with increasing disbond size, demonstrating that it has potential to quantitatively size disbonds.",
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Modal content-based damage indicators for disbonds in adhesively bonded composite structures. / Ren, Baiyang; Lissenden, III, Clifford Jesse.

In: Structural Health Monitoring, Vol. 15, No. 5, 01.09.2016, p. 491-504.

Research output: Contribution to journalArticle

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