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A Method of Measuring Post-Yield Strain

Published online by Cambridge University Press:  28 July 2016

F. J. Woodcock  and
K. R. Weiss
F. J. Woodcock
Affiliation:
Royal Aircraft Establishment and Fighting Vehicles Research and Development Establishment
K. R. Weiss
Affiliation:
Royal Aircraft Establishment and Fighting Vehicles Research and Development Establishment
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Extract

Increasing interest has been shown recently in the measurement and interpretation of post-yield strains. Early investigators determined the nature and magnitude of such strains by observing the distortion of a grid of fine lines inscribed on the unstrained metal. A development of this method involved the use of a photographically deposited grid.

In the present instance the initial requirement (August 1948) was for the measurement against time of strains of the order of 4 per cent. occurring as “ fast transients.”

As the wire resistance strain gauge element was well established, it was natural to consider its extension to post-yield measurements, and it later became apparent that this had already been done by Swainger.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 57 , Issue 505 , January 1953 , pp. 49 - 51
Copyright
Copyright © Royal Aeronautical Society 1953

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References

1. Swainger, K. H. (1948). The Measurements and Interpretation of Post-Yield Strains. Proceedings of the Society for Experimental Stress Analysis, Vol. 5, No. 2, 1948.Google Scholar
2. Jones, Eric, and Maslen, K. R. The Physical Characteristics of Wire Resistance Strain Gauges. R. & M. 2661.Google Scholar
3. Maslen, K. R. Strain Sensitivities of Fine Wires. Unpublished R.A.E. Technical Note.Google Scholar
4. Brown, R. P. and Svensson, N. L. (1951). Properties of Strain Gauge Wires. Australian Department of Supply, A.R.L. Structures and Materials Note 191.Google Scholar
5. Svensson, N. L. (1951). A New Electric Resistance Strain Gauge for Large Strain. Australian Department of Supply, A.R.L. Structures and Materials Note 193.Google Scholar