Specimen inertia in high strain-rate compression

Abstract

Previous theories of the inertial contribution to measured stress in dynamic compression of cylindrical specimens have been extended to allow for anvil motion as well as specimen strain. A numerical model has been developed to estimate the inertial stress from this theory, and it was found that the new term can have the largest contribution. Because of the effects of wave propagation and dispersion found in experimental records, an estimate of the inertial errors from this numerical simulation is probably more reliable than an estimate derived directly from the experimental measurements.