A tensile technique for materials testing at high strain rates

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Abstract
A method of tensile testing of materials under dynamic conditions has been developed involving little modification to the normal compressive split Hopkinson bar system. The specimens are of tapered shape enabling testing to be carried out at stresses in excess of the yield stress of the pressure bars, while the easy access to the specimens allows testing over a wide range of temperature. Virtually constant strain rates of up to 1500 s-1 have been achieved for stainless steel specimens. A constant effective specimen gauge length has been shown to apply for strain rates from quasi-static to dynamic.

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