Air-coupled ultrasonic NDE of bonded aluminum lap joints
UNSPECIFIED. (1997) Air-coupled ultrasonic NDE of bonded aluminum lap joints. ULTRASONICS, 35 (1). pp. 1-6. ISSN 0041-624XFull text not available from this repository.
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|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)
|Journal or Publication Title:||ULTRASONICS|
|Publisher:||ELSEVIER SCIENCE BV|
|Number of Pages:||6|
|Page Range:||pp. 1-6|
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