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Air-coupled ultrasonic NDE of bonded aluminum lap joints
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UNSPECIFIED (1997) Air-coupled ultrasonic NDE of bonded aluminum lap joints. ULTRASONICS, 35 (1). pp. 1-6. ISSN 0041-624X.
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Abstract
This paper describes an investigation into the feasibility of using wideband air-coupled ultrasonic transducers for evaluating the integrity of bonded aluminum lap joints. Micromachined capacitance transducers are used to generate and detect ultrasonic Lamb waves in aluminum lap-joints through an intervening air layer. The transmission of Lamb waves through the bond is affected by the bond's local state, such that scanning a pair of air-transducers allows images to be produced either with the transducers on opposite sides of the plate, or on the same side. It is shown that defects in the bond-line can be detected and imaged by such a non-contract system. Confirmation of defect positions are obtained by comparing the results of the air-coupled scans to a conventional immersion ultrasonic C-scan.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) R Medicine |
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Journal or Publication Title: | ULTRASONICS | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0041-624X | ||||
Official Date: | February 1997 | ||||
Dates: |
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Volume: | 35 | ||||
Number: | 1 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 1-6 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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