Visualization of contact stress distribution using infrared stress-measurement system

Takahide Sakagami; Keiji Ogura; Shiro Kubo; Jon R. Lesniak; Bradley R. Boyce; Bela I. Sandor

doi:10.1117/12.271650

4 April 1997 Visualization of contact stress distribution using infrared stress-measurement system

Takahide Sakagami, Keiji Ogura, Shiro Kubo, Jon R. Lesniak, Bradley R. Boyce, Bela I. Sandor

Proceedings Volume 3056, Thermosense XIX: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1997) https://doi.org/10.1117/12.271650
Event: AeroSense '97, 1997, Orlando, FL, United States

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.

Citation Download Citation

Takahide Sakagami, Keiji Ogura, Shiro Kubo, Jon R. Lesniak, Bradley R. Boyce, and Bela I. Sandor "Visualization of contact stress distribution using infrared stress-measurement system", Proc. SPIE 3056, Thermosense XIX: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (4 April 1997); https://doi.org/10.1117/12.271650

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