The split Hopkinson bar has become an increasingly popular tool in the study of the dynamic response of materials. In the present paper, an application of the split Hopkinson bar technique with the aid of a micro-computer is presented which allows simultaneous recording of stress vs. strain, stress vs. time, strain vs. time, and strain-rate vs. time for a dynamic loading. Specimens of copper, alumium and lead are tested at the range of strain rates up to about 1000 sec^<-1> to determine their strain-rate sensitivity. The experimental results agreed approximately with either a logarithmic law σ ∞In έ or a power law σ ∞ έ^ｎ.
衝撃荷重下における応力―ひずみ曲線
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