Author(s)

H. Couque

Abstract

Failure under dynamic compression of ductile tungsten alloys was examined by conducting symmetric Taylor tests at impacted speeds ranging from 200 to 350 m/s. A fracture parameter consisting of the average surface shear crack length was identified and computed as a function of the impact velocity. From these data, a threshold speed characterizing shear failure was deduced and found to be a mean of differentiating dynamic compression fracture properties of metals. 1 Introduction The Taylor test has been used over the past fifty years as a mean to evaluate dynamic mechanical property of materials [1]. Because the Taylor test involved stress and strain rate singularities, the Hopkinson pressure bars test generating dynamic stress-strain responses

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