HIGH RESOLUTION ULTRASONIC IMAGING OF DISBONDS IN ADHESIVELY BONDED COMPOSITE STRUCTURES

Authors
  1. McRae, K.I.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN)
Abstract
Composite and metallic structural components may be joined by a variety of techniques and adhesive bonding techniques are being increasingly utilized within the aerospace industry. The detection of disbonds in adhesively bonded joints and the detection of delaminations in composite materials constitute similar ultrasonic imaging problems in that the characteristic flaw in each case is a planar void. The information derived from the two usual ultrasonic imaging methods, B- and C-scan, may be used to determine both the flaw depth in the specimen and the area of the flaw. Signal processing techniques are applied to determine both the amplitude and the polarity of each discrete reflection. Examples of each imaging method are presented for a three-dimensional data set obtained from a graphite/epoxy (Gr/Ep) - titanium interface containing simulated disbonds. The importance of concurrently displaying amplitude and polarity information is demonstrated.
Report Number
DREP-TM-89-6 — Technical Memorandum
Date of publication
15 Mar 1989
Number of Pages
25
DSTKIM No
89-02756
CANDIS No
60660
Format(s):
Hardcopy;Originator's fiche received by DSIS

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