Abstract
To improve safety during car crushing, to develop a new method of high speed plastic working, and to develop practical constitutive equations for computer codes, it is important to accurately obtain the entire tensile stress-strain curves for a variety of materials that cover a wide range of strain and strain rates. Through numerical simulation using computer code, the relationship between the upper limits of the gauge length of the specimen and the strain rate during testing, necessary to accurately obtain the dynamic stress-strain curves, is also presented. These limits are useful to useful to dynamic tensile testing for a wide range of strain rates.
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