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Empirical Formulae for the Determination of Stress Curves

Published online by Cambridge University Press:  28 July 2016

E. Voce
E. Voce*
Affiliation:
Copper Development Association
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Extract

The Paper by A.C.Nicholls in the October 1954 Journal (p. 724) describes two empirical equations neither of which possesses the first essential of an acceptable strain hardening function, namely that the stress attained in a preliminary straining operation shall become explicitly the threshold stress at which subsequent deformation begins. Eight years of study and the analysis of hundreds of published curves have convinced me that the exponential function put forward in 1948 faithfully reflects the strain hardening process. Far from being empirical, it can readily be deduced from a few simple and credible assumptions, and has counterparts in many branches of physics.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 59 , Issue 533 , May 1955 , pp. 362 - 364
Copyright
Copyright © Royal Aeronautical Society 1955

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References

1. Voce, E. (1948). Journal of the Institute of Metals, Vol. 74, p. 537, 1948.Google Scholar
1. Voce, E. (1953). The Engineer, Vol. 195, p. 23, 1953.Google Scholar