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The Separation of Principal Stresses in Photo-Elastic Analysis

Published online by Cambridge University Press:  28 July 2016

E. K. Frankl
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Extract

The photo-elastic method can be used for either of two main purposes:

  1. a) As a qualitative design tool to obtain indications of possibly unsuspected sources of stress concentration.

  2. (b) As a means of obtaining a complete analysis of a two-dimensional stress problem, i.e., the determination of the separate magnitudes of the principal stresses at any point, as well as the direction of the principal planes relative to some axis of reference.

All that is required for (a) is the stress pattern which becomes visible and can be photographed when a loaded model cut from a sheet of suitable material is placed in a field of circularly polarised light.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 50 , Issue 432 , December 1946 , pp. 974 - 985
Copyright
Copyright © Royal Aeronautical Society 1946

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