Paper E–10: The use of High-Speed Photography and Photoelastic Coatings for the Determination of Dynamic Strains

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: orig-research
Abstract: High-speed photography and photoelasticity have been widely used to determine dynamic strains in transparent plastic models subjected to shocks, vibrations, etc. The recent development of a photoelastic-coating technique has opened new horizons for investigation of dynamic strain phenomena in opaque structural parts. The part is coated with photoelastic plastic film and statically or dynamically loaded. Strains are transmitted from the surface of the part to the plastic coating. The interference pattern obtained when the plastic is illuminated with polarized light is interpreted by classical photoelastic methods. The pattern is recorded by a camera whose photographic rate is chosen as a function of velocity of the dynamic strain phenomena. This paper describes color and black-and-white reflected-light photography accomplished with a 48,000-to-1,200,000 frame/sec framing camera using argon flashbombs or electronic flash. Photography of materials coated with photoelastic plastic is emphasized. The dynamic strain distribution due to wave propagation is investigated. The effect of plastic thickness and time lag due to the difference of modulus of elasticity and density of the plastic, as compared to the underlying material, is discussed. An attempt is made to obtain quantitative data from the photoelastic patterns observed.
Publication Date: 1962-01-01
DOI: 10.5594/J18118XY
Link: https://doi.org/10.5594/J18118XY
Author(s): Charles A. Cole, John F. Quinlan, Felix Zandman

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Charles A. Cole, John F. Quinlan, and Felix Zandman; Paper E–10: The use of High-Speed Photography and Photoelastic Coatings for the Determination of Dynamic Strains, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18118XY

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Charles A. Cole, John F. Quinlan, and Felix Zandman; Paper E–10: The use of High-Speed Photography and Photoelastic Coatings for the Determination of Dynamic Strains, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18118XY

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<span class="citation">Charles A. Cole, John F. Quinlan, and Felix Zandman; <cite>Paper E–10: The use of High-Speed Photography and Photoelastic Coatings for the Determination of Dynamic Strains</cite>, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at <a href="https://doi.org/10.5594/J18118XY" target="_blank" rel="noopener">https://doi.org/10.5594/J18118XY</a></span>

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<li>
Charles A. Cole, John F. Quinlan, and Felix Zandman; <cite id="bib-10-5594-j18118xy">Paper E–10: The use of High-Speed Photography and Photoelastic Coatings for the Determination of Dynamic Strains</cite>, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962
<span class="doi">10.5594/J18118XY</span>
</li>