Paper Title:
Internal Defect Inspection of Composite Material Using Non-Contact UT
  Abstract

The NAUT technique allows non-contact ultrasonic testing in air. If the NAUT technique can be applied, not only ultrasonic testing in air with no couplant would be possible, but also the stable transmission and reception of ultrasonic waves, which would thus enable ultrasonic testing of hot or cold materials, or rough surfaces of specimens that could not be tested with conventional-contact ultrasonic testing techniques. By trying NAUT for CFRP (carbon fiber-reinforced plastic) specimens, the applicability of NAUT in these areas was observed, and the results from the waveforms of parts of the specimens were analyzed. To verify the usefulness of NAUT, first, artificially defective specimens were tested to investigate the defect detection ability of NAUT; and second, a test was conducted to select the test conditions, the ultrasonic propagation characteristics, and the mode conversion by the material thickness. Both the spot welding and CFRP specimens showed good applicability of NAUT. For the spot welding specimen, the ultrasonic transmittance was highest at the spot-welded part, regardless of the thickness and location of the specimen. For the CFRP specimen, the waveforms of a defective part and a defect-free part were compared, and the existence of delamination was discovered through the increase and decrease in the amplitude. These findings confirmed the practicality (usefulness) of NAUT.

  Info
Periodical
Advanced Materials Research (Volumes 123-125)
Edited by
Joong Hee Lee
Pages
827-830
DOI
10.4028/www.scientific.net/AMR.123-125.827
Citation
K. S. Song, S. Y. Na, J. Y. Kim, "Internal Defect Inspection of Composite Material Using Non-Contact UT", Advanced Materials Research, Vols. 123-125, pp. 827-830, 2010
Online since
August 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Gye Jo Jung, Yeon Shik Ahn, Yong Sang Cho, Sang Ki Park, Doo Song Gil, W.H. Lee
271
  | Authors: S. Abdul Aziz, Margaret Lucas
Abstract:The use of ultrasonic excitation of tools and dies in metal forming operations has been the subject of ongoing research for many years....
311
Authors: Eun Mi Kim, Ho Su Jang, Dong Sam Park
Abstract:Ultrasonic energy is spotlighted as a skill which connects detailed parts accurately and safely. So we designed the horn needed for attaching...
536
Authors: Mark J. Eaton, Rhys Pullin, C.A. Featherston, Karen M. Holford
Abstract:Damage detection and location in aerospace composites is currently of great interest in the research community and is being driven by the...
381
Authors: Zhang Dong Li, Bo Zhao
Abstract:This paper proposes to use a method of ultrasonic milling on the composite materials processing, we mainly studies the effect of the length...
429