Ultrasonic sensing and time-frequency analysis for detecting plastic deformation in an aluminum plate

Lindsey Channels, Debejyo Chakraborty, Donna Simon, Narayan Kovvali, James Spicer, Antonia Papandreou-Suppappola, Douglas Cochran, Pedro Peralta, Aditi Chattopadhyay

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

8 Scopus citations

Abstract

We investigate the use of low frequency (10-70 MHz) laser ultrasound for the detection of fatigue damage. While high frequency ultrasonics have been utilized in earlier work, unlike contacting transducers, laser-based techniques allow for simultaneous interrogation of the longitudinal and shear moduli of the fatigued material. The differential attenuation changes with the degree of damage, indicating the presence of plasticity. In this paper, we describe a structural damage identification approach based on ultrasonic sensing and time-frequency techniques. A parsimonious representation is first constructed for the ultrasonic signals using the modified matching pursuit decomposition (MMPD) method. This decomposition is then employed to compute projections onto the various damage classes, and classification is performed based on the magnitude of these projections. Results are presented for the detection of fatigue damage in Al-6061 and Al-2024 plates tested under 3-point bending.

Original languageEnglish (US)
Title of host publicationModeling, Signal Processing, and Control for Smart Structures 2008
DOIs
StatePublished - Jun 2 2008
EventModeling, Signal Processing, and Control for Smart Structures 2008 - San Diego, CA, United States
Duration: Mar 10 2008Mar 12 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6926
ISSN (Print)0277-786X

Other

OtherModeling, Signal Processing, and Control for Smart Structures 2008
CountryUnited States
CitySan Diego, CA
Period3/10/083/12/08

Keywords

  • Damage detection
  • Matching pursuit decomposition
  • Structural health monitoring
  • Time-frequency analysis
  • Ultrasonic sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Ultrasonic sensing and time-frequency analysis for detecting plastic deformation in an aluminum plate'. Together they form a unique fingerprint.

  • Cite this

    Channels, L., Chakraborty, D., Simon, D., Kovvali, N., Spicer, J., Papandreou-Suppappola, A., Cochran, D., Peralta, P., & Chattopadhyay, A. (2008). Ultrasonic sensing and time-frequency analysis for detecting plastic deformation in an aluminum plate. In Modeling, Signal Processing, and Control for Smart Structures 2008 [69260P] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6926). https://doi.org/10.1117/12.776625