Ultrasonic guided wave propagation across waveguide transitions

Energy transfer and mode conversion

Padmakumar Puthillath, Jose M. Galan, Baiyang Ren, Clifford Jesse Lissenden, III, Joseph Lawrence Rose

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Ultrasonic guided wave inspection of structures containing adhesively bonded joints requires an understanding of the interaction of guided waves with geometric and material discontinuities or transitions in the waveguide. Such interactions result in mode conversion with energy being partitioned among the reflected and transmitted modes. The step transition between an aluminum layer and an aluminum-adhesive-aluminum multi-layer waveguide is analyzed as a model structure. Dispersion analysis enables assessment of (i) synchronism through dispersion curve overlap and (ii) wavestructure correlation. Mode-pairs in the multi-layer waveguide are defined relative to a prescribed mode in a single layer as being synchronized and having nearly perfect wavestructure matching. Only a limited number of mode-pairs exist, and each has a unique frequency range. A hybrid model based on semi-analytical finite elements and the normal mode expansion is implemented to assess mode conversion at a step transition in a waveguide. The model results indicate that synchronism and wavestructure matching is associated with energy transfer through the step transition, and that the energy of an incident wave mode in a single layer is transmitted almost entirely to the associated mode-pair, where one exists. This analysis guides the selection of incident modes that convert into transmitted modes and improve adhesive joint inspection with ultrasonic guided waves.

Original languageEnglish (US)
Pages (from-to)2624-2633
Number of pages10
JournalJournal of the Acoustical Society of America
Volume133
Issue number5
DOIs
StatePublished - May 1 2013

Fingerprint

wave propagation
ultrasonics
energy transfer
waveguides
aluminum
adhesives
inspection
synchronism
Waves
Energy Transfer
bonded joints
discontinuity
frequency ranges
Layer
interactions
expansion
energy
curves

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Puthillath, Padmakumar ; Galan, Jose M. ; Ren, Baiyang ; Lissenden, III, Clifford Jesse ; Rose, Joseph Lawrence. / Ultrasonic guided wave propagation across waveguide transitions : Energy transfer and mode conversion. In: Journal of the Acoustical Society of America. 2013 ; Vol. 133, No. 5. pp. 2624-2633.
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Ultrasonic guided wave propagation across waveguide transitions : Energy transfer and mode conversion. / Puthillath, Padmakumar; Galan, Jose M.; Ren, Baiyang; Lissenden, III, Clifford Jesse; Rose, Joseph Lawrence.

In: Journal of the Acoustical Society of America, Vol. 133, No. 5, 01.05.2013, p. 2624-2633.

Research output: Contribution to journalArticle

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