Nonlinear thermosonics and laser vibrometry for barely visible impact damage of a composite stiffener panel

Gian Piero Malfense Fierro, Dmitri Ginzburg, Francesco Ciampa, Michele Meo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

Two methods have been evaluated in order to locate barely visible impact damage (BVID) in a composite stiffener panel. A nonlinear thermosonics technique and a nonlinear laser vibrometer technique were evaluated. Damaged regions were excited using a piezo shaker in both methods. Evaluation of the damaged regions was done by first determining the second and third order nonlinear harmonic response of the damaged regions. This was then used to determine the excitation frequency. By evaluating the presence of nonlinear responses in the output signal it is possible to excite the damaged structure at frequencies that give high heat generation and high displacements at the damaged regions. The results showed that both methods can be used to locate damaged regions, although it was shown that the stiffener impedes the propagation of the exciting wave and that these tests should be carried out in-between stiffeners in order to maximise the excitation and heating of damaged regions. Furthermore, both methods allowed for excitation of damaged regions over a large area.

Original languageEnglish
Title of host publicationNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure, 2016
EditorsT. Yu, A. L. Gyekenyesi, P. J. Shull, H. F. Wu
PublisherSPIE
Volume9804
ISBN (Print)9781510600454
DOIs
Publication statusPublished - 22 Apr 2016
EventNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016 - Las Vegas, USA United States
Duration: 21 Mar 201624 Mar 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X

Conference

ConferenceNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016
CountryUSA United States
CityLas Vegas
Period21/03/1624/03/16

Keywords

  • BVID
  • Laser Vibrometer
  • Nonlinear Ultrasound
  • Stiffener Panel
  • Thermography
  • Thermosonics

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  • Cite this

    Malfense Fierro, G. P., Ginzburg, D., Ciampa, F., & Meo, M. (2016). Nonlinear thermosonics and laser vibrometry for barely visible impact damage of a composite stiffener panel. In T. Yu, A. L. Gyekenyesi, P. J. Shull, & H. F. Wu (Eds.), Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure, 2016 (Vol. 9804). [980419] (Proceedings of SPIE - The International Society for Optical Engineering). SPIE. https://doi.org/10.1117/12.2220418