Ultrasonic Newton's rings

Date
1992
Authors
Hsu, David
Dayal, Vinay
Dayal, Vinay
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Aerospace Engineering
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Aerospace Engineering
Abstract

Interference fringes due to bondline thickness variation were observed in ultrasonic scans of the reflected echo amplitude from the bondline of adhesively joined aluminum skins. To demonstrate that full-field interference patterns are observable in point-by-point ultrasonic scans, an optical setup for Newton's rings was scanned ultrasonically in a water immersion tank. The ultrasonic scan showed distinct Newton's rings whose radii were in excellent agreement with the prediction.

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This article is from Applied Physics Letters 60 (1992): 1169, doi: 10.1063/1.107394. Posted with permission.

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