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Title: Ultrasonic Newton's rings

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.
Authors:
 [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))
Publication Date:
OSTI Identifier:
7206818
DOE Contract Number:
W-7405-ENG-82
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; (United States); Journal Volume: 60:10
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ACOUSTIC MICROSCOPY; INTERFEROMETRY; FILMS; ULTRASONIC TESTING; ULTRASONIC WAVES; INTERFERENCE; MEASURING METHODS; THICKNESS; ACOUSTIC TESTING; DIMENSIONS; MATERIALS TESTING; MICROSCOPY; NONDESTRUCTIVE TESTING; SOUND WAVES; TESTING 420500* -- Engineering-- Materials Testing