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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 12 — Apr. 20, 2014
  • pp: 2656–2663

Detection of drilling-induced delamination in aeronautical composites by noncontact laser ultrasonic method

Zhenggan Zhou, Guangkai Sun, Xiucheng Chen, and Jie Wang  »View Author Affiliations

Applied Optics, Vol. 53, Issue 12, pp. 2656-2663 (2014)

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A novel application of the laser ultrasonic technique for the detection of drilling-induced delamination in composite components of aircrafts is proposed. Numerous key components of aircrafts are made of composite materials, and drilling is often a final operation during assembly. Drilling-induced delamination significantly reduces the structural reliability, and it is rather difficult to be detected effectively and automatically. The laser ultrasonic technique is a promising method to solve the problem. This paper investigates the characterization of drilling-induced delamination in composites by a noncontact laser ultrasonic method. A carbon fiber reinforced plastic laminate with drilling holes is prepared as a specimen. The characterization of drilling-induced delamination with laser-generated ultrasonic waves is investigated theoretically and experimentally, and the morphology features of the delamination are obtained by laser ultrasonic C-scan testing. The results prove that the laser ultrasonic technique is effective for the detection of drilling-induced delamination in composite components, and it is a feasible solution for evaluating the drilling quality during assembly.

© 2014 Optical Society of America

OCIS Codes
(110.7170) Imaging systems : Ultrasound
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(140.3460) Lasers and laser optics : Lasers
(350.4600) Other areas of optics : Optical engineering

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: December 11, 2013
Revised Manuscript: March 21, 2014
Manuscript Accepted: March 21, 2014
Published: April 17, 2014

Zhenggan Zhou, Guangkai Sun, Xiucheng Chen, and Jie Wang, "Detection of drilling-induced delamination in aeronautical composites by noncontact laser ultrasonic method," Appl. Opt. 53, 2656-2663 (2014)

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