Determination of the dynamic response of AD-85 alumina with in-material Manganin gauges

Abstract

Plate impact experiments were performed on commercial alumina disks (AD-85, manufactured by Coors), with in-material Manganin gauges, in order to determine the dynamic response of this material in the 0-100 kb range. The measured stress signals showed that the transmitted waves, at the high stress range, are composed of an initial elastic jump, to about 60 kb, followed by a dispersive rise to the final stress level. This behavior was found recently for pure alumina but not for AD-85. We used the gauges to determine the Hugoniot curve of AD-85 in the 0-100 kb range and its spall strength in this region.