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Title: Ultrasonic Newton's rings

Journal Article · · Applied Physics Letters; (United States)
DOI:https://doi.org/10.1063/1.107394· OSTI ID:7206818
 [1];  [2]
  1. FAA Center for Aviation Systems Reliability, Iowa State University, Ames, Iowa 50011 (United States)
  2. Aerospace Engineering and Engineering Mechanics Department, Iowa State University, Ames, Iowa 50011 (United States)

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.

DOE Contract Number:
W-7405-ENG-82
OSTI ID:
7206818
Journal Information:
Applied Physics Letters; (United States), Vol. 60:10; ISSN 0003-6951
Country of Publication:
United States
Language:
English