Journal Published Online: 07 September 2018
Volume 48, Issue 2

Detection and Characterization of Hidden Corrosion in Aircraft Lap Joints by Optical NDT Method

CODEN: JTEVAB

Abstract

Hidden corrosion in lap splice faying surfaces can directly affect the airworthiness of an aircraft. The corrosion thinning not only reduces the residual strength of aircraft components but also adds stresses from corrosion growth in confined spaces (e.g., corrosion pillowing). This article presents an optical nondestructive inspection technique for the detection and quantification of hidden corrosion in multilayer structures. Based on the bright field illumination technique with a laser light, a calibration procedure is developed to correlate the amplitude of the pillowing deformation of lap joints to the intensity changes of laser light. Using a finite element model of the lap joint, it is possible to relate pillowing deformation to the amount of material loss. Applying the proposed method to an aircraft lap joint shows very promising results.

Author Information

Safizadeh, M. S.
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran
RasouliNasab, M. R.
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran
Pages: 9
Price: $25.00
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Details
Stock #: JTE20170389
ISSN: 0090-3973
DOI: 10.1520/JTE20170389