広いひずみ速度範囲における炭素鋼の構成式

概要

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A constitutive equation dependent on the strain rate was proposed and was applied to carbon steels . It was derived from the approximation of two different dislocation movements, that is, one being dominant at low strain rates and the other at high strain rates. Compressive tests for four carbon steels (0.19%C, 0.37%C, 0.45%C and 0.57%C) were conducted under various constant strain rates ranging from 10^<-4> to 1 000/sec by using three types of the strain rate hysteresis effect on the stress-strain relation. The present constitutive euation was applied to the measured stress-strain relation. As a result, it agreed well with the experimental values. The experimental constants included in the equation were found to be determinable from a comparatively small number of experiments. So, the present consititutive euation seems to be a valid for practical use.
社団法人日本材料学会の論文
1985-12-15