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Proceedings Paper

Visualization of contact stress distribution using infrared stress-measurement system
Author(s): Takahide Sakagami; Keiji Ogura; Shiro Kubo; Jon R. Lesniak; Bradley R. Boyce; Bela I. Sandor
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Paper Abstract

A new experimental technique using an infrared stress measurement system and an infrared transmitting material is proposed for the visualization of a contact stress distribution. An infrared transmitting material is employed as one of two contacting materials, and is brought into contact with a cyclically loaded sample. Infrared emissions from the contact surface are measured through the infrared transmitting material, and thermoelastic stress analysis (TSA) is applied to measure the contact stress distribution. First, a flat contact is investigated, in which a barium- fluoride window is in contact with an embossed plastic letter. Stress distribution on the contact area in the letter can be measured accurately. Further, a spherical Hertz contact is examined by using an infrared transmitting sapphire convex lens and a flat plastic plate. The obtained contact stress distribution is compared with the stress distribution predicted by the Hertz theory. An excellent correspondence is found between those stress distributions, indicating the feasibility of quantitative analysis using the present technique.

Paper Details

Date Published: 4 April 1997
PDF: 10 pages
Proc. SPIE 3056, Thermosense XIX: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (4 April 1997); doi: 10.1117/12.271650
Show Author Affiliations
Takahide Sakagami, Osaka Univ. (Japan)
Keiji Ogura, Osaka Univ. (Japan)
Shiro Kubo, Osaka Univ. (Japan)
Jon R. Lesniak, Stress Photonics Inc. (United States)
Bradley R. Boyce, Stress Photonics Inc. (United States)
Bela I. Sandor, Univ. of Wisconsin/Madison (United States)

Published in SPIE Proceedings Vol. 3056:
Thermosense XIX: An International Conference on Thermal Sensing and Imaging Diagnostic Applications
Richard Norman Wurzbach; Douglas D. Burleigh, Editor(s)

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