ON TIME-INDEPENDENT PLASTICITY AND METALS UNDER COMBINED STRESS AT ELEVATED TEMPERATURE.
BROWN UNIV PROVIDENCE R I DIV OF ENGINEERING
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A possible description is proposed for the time- and temperature-dependent behavior of metals under combined stress. The present knowledge of essentially time-independent behavior, embodied in the mathematical theory of plastic stress-strain relations and the associated experimental data, is combined with the knowledge of behavior in simple tension at elevated temperature. This is in the spirit of Odqvists early approach 1934 which translated Mises description of isotropic plastic stress-strain relations to a most useful formulation for creep under constant stress. Little relevant experimental data is available as yet to permit evaluation of the proposals which are advanced. Questions are raised to which answers cannot be given now. Part of an experimental program in progress is outlined along with directions for future work. Author
- Metallurgy and Metallography