Damage detection in composites using nonlinear ultrasonically modulated thermography

G. P. Malfense Fierro, D. Dionysopoulos, M. Meo, F. Ciampa

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

Abstract

This paper proposes a novel nonlinear ultrasonically stimulated thermography technique for a quick and reliable assessment of material damage in carbon fibre reinforced plastic (CFRP) composite materials. The proposed nondestructive evaluation (NDE) method requires narrow sweep ultrasonic excitation using contact piezoelectric transducers in order to identify dual excitation frequencies associated with the damage resonance. High-amplitude signals and higher harmonic generation are necessary conditions for an accurate identification of these two input frequencies. Dual periodic excitation using high- and low-frequency input signals was then performed in order to generate frictional heating at the crack location that was measured by an infrared (IR) camera. To validate this concept, an impact damaged CFRP composite panel was tested and the experimental results were compared with traditional flash thermography. A laser vibrometer was used to investigate the response of the material with dual frequency excitation. The proposed nonlinear ultrasonically modulated thermography successfully detected barely visible impact damage in CFRP composites. Hence, it can be considered as an alternative to traditional flash thermography and thermosonics by allowing repeatable detection of damage in composites.

Original languageEnglish
Title of host publicationNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII
PublisherSPIE
Volume10599
ISBN (Electronic)9781510616943
DOIs
Publication statusPublished - 27 Mar 2018
EventNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII 2018 - Denver, USA United States
Duration: 5 Mar 20188 Mar 2018

Conference

ConferenceNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII 2018
CountryUSA United States
CityDenver
Period5/03/188/03/18

Keywords

  • Composites.
  • Laser Vibrometry
  • Nonlinear Ultrasounds
  • Thermography
  • Thermosonics

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 'Damage detection in composites using nonlinear ultrasonically modulated thermography'. Together they form a unique fingerprint.

  • Cite this

    Malfense Fierro, G. P., Dionysopoulos, D., Meo, M., & Ciampa, F. (2018). Damage detection in composites using nonlinear ultrasonically modulated thermography. In Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII (Vol. 10599). [105990K] SPIE. https://doi.org/10.1117/12.2303404