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Optical Engineering

Simple calibration method for determining KI using the method of caustics
Author(s): Nashwan T. Younis; Ibrahim Miskioglu; Steven E. Egleston
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Paper Abstract

The uncertainty in selecting the length parameter (the maximum diameter) of a caustic image is investigated. A simple calibration method is used to determine the mode-I stress intensity factor KI at a crack tip. The accuracy is further improved by using white light. The effect of the pinhole size on the determination of KI is investigated. The accuracy of the proposed measurement location is demonstrated by comparing experimental results with theory.

Paper Details

Date Published: 1 September 1994
PDF: 8 pages
Opt. Eng. 33(9) doi: 10.1117/12.177514
Published in: Optical Engineering Volume 33, Issue 9
Show Author Affiliations
Nashwan T. Younis, Purdue Univ./Fort Wayne (United States)
Ibrahim Miskioglu, Michigan Technological Univ. (United States)
Steven E. Egleston, Michigan Technological Univ. (United States)


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