A Method for Determining Material Properties at High Rates of Shearing Strain

摘要

The details of an experimental program suitable for determining the mechanical properties of certain materials at high rates of shearing strain are given. The major contribution of this work is a description of a successful method for producing sharp torsional pulses in the main loading rod of a torsional split-Hopkinson bar, by means of the simultaneous detonation of two explosive charges at the ends of long 'pre-load' bars in contact with the main loading rod. The method could be used for the study of the linear viscoelastic properties of materials like high polymers, and could also be employed in the study of the non-linear behavior of materials at high rates of shearing strain. (Author)