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Photoelastic Analysis of Three-Dimensional Stress Systems using Scattered Light*

Published online by Cambridge University Press:  28 July 2016

R. Weller  and
J. K. Bussey
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Summary

A method has been developed for making photoelastic analyses of threedimensional stress systems by utilising the polarisation phenomena associated with the scattering of light. By this method, the maximum shear and the directions of the three principal stresses at any point within a model can be determined, and the two principal stresses at a free-bounding surface can be separately evaluated. Polarised light is projected into the model through a slit so that it illuminates a plane section. The light is continuously analysed along its path by scattering and the state of stress in the illuminated section is obtained. By means of a series of such sections, the entire stress field may be explored. The method was used to analyse the stress system of a simple beam in bending. The results were found to be in good agreement with those expected from elementary theory.

Type
Research Article
Information
The Aeronautical Journal , Volume 44 , Issue 349 , January 1940 , pp. 74 - 88
Copyright
Copyright © Royal Aeronautical Society 1940

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Footnotes

*

A reprint of N.A.C.A. Technical Note No. 737 (November, 1939) by courteous permission of the National Advisory Committee for Aeronautics.

References

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