An adaptive time domain deconvolution technique to characterize planar flaws in highly attenuative composites

H. A. Huang, C. E. Bakis, H. T. Hahn, A. P. Diwanji

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

To identify planar heterogeneities or flaws inside a structure using ultrasonic tests, it is necessary to characterize reflections originating from the boundaries of the heterogeneities. However, for composite materials with high, frequency-dependent wave attenuation, it is often not possible to clearly identify the reflections with either A-scan signals or conventional deconvolution techniques due to the combined effect of signal distortion and overlap. To enable deconvolution of a distorted propagating wave, a new time domain deconvolution technique which includes the frequencydependent acoustic properties of the host material has been developed. This approach is shown to be superior to conventional time domain deconvolution with L1 norm minimization in resolving flaw reflections in highly attenuative glass fiber reinforced polyurethane composites.

Original languageEnglish (US)
Pages (from-to)101-109
Number of pages9
JournalJournal of Nondestructive Evaluation
Volume13
Issue number3
DOIs
StatePublished - Sep 1 1994

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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