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Photoelastometric recording of stress waves

Paper describes tests of a linear strain-proportional photoelastometric system which offers several advantages when recording stress waves. Also, it reports that system is relatively simple to use and speeds data-reduction time

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Abstract

A very sensitive, fast-responding photomultiplier tube and laser light source were used to record stress-optic data associated with a moving stress wave. By using a “gray-field” (which is halfway between a dark and light field) polariscope, optical-electrical recordings were obtained which were linearly proportional to strain. A discriminatory record results which exhibits a higher signal-to-noise ratio than semiconductor strain gages. Gage length can be varied from 0.005 in. upwards.

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Author information

Authors and Affiliations

  1. University of California, Berkeley

    D. M. Cunningham (Professor of Mechanical Engineering)

  2. Lawrence Radiation Laboratory, Livermore, Calif.

    G. W. Brown (Professor of Mechanical Engineering) & J. C. Griffith (Research Technician)

Authors
  1. D. M. Cunningham
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  2. G. W. Brown
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  3. J. C. Griffith
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Additional information

Work was performed under the auspices of the U. S. Atomic Energy Commission.

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Cunningham, D.M., Brown, G.W. & Griffith, J.C. Photoelastometric recording of stress waves. Experimental Mechanics 10, 114–119 (1970). https://doi.org/10.1007/BF02325115

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  • DOI: https://doi.org/10.1007/BF02325115

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