The inelastic behavior and failure of dense glass under shock loading to 15GPa

Abstract

The in-material longitudinal and lateral stress histories in an extra-dense, silica-based glass have been measured at impact pressures well above the Hugoniot elastic limit using embedded manganin stress gauges during plate impact experiments. The measurements of longitudinal stress extend the current data and are used to provide an extensive principal Hugoniot for the material. The lateral stress measurements obtained at high impact pressures show the pressure-dependent nature of the failure process, consistent with previous studies on dense glasses. The longitudinal and lateral data obtained are used to determine the shear strength versus time history during high-pressure loading. These data in conjunction with high-speed photographic records provide insight into the inelastic response and evolution of failure in brittle materials during shock loading.