1991 Volume 40 Issue 458 Pages 1410-1414
The cyclic stress-strain response was numerically calculated for commercially pure copper using an analytical method derived from the concept of dislocation dynamics.
The shape of the stress-strain hysteresis loop was mainly controlled by one of the constants included in the expression of internal stress. Consequently, the hysteresis loop was quantitatively described very well by choosing this constant properly.
Both the cyclic stress-strain curves determined from the companion specimen method and the incremental strain-step method were in good agreement with the ones calculated under the respective cyclic straining conditions.
The cyclic frequency dependency of cyclic stress-strain response was calculated through the proposed analytical method, and the effect of cyclic frequency on the fatigue life was successfully evaluated.
