Issues surrounding lateral stress measurements in alumina ceramics

摘要: Plate impact experiments have been performed on alumina ceramics and lateral stresses measured by means of embedded manganin gauges. It is shown that the sample flyer plate configuration can a large effect form stress wave profile obtained. Within certain regime in exhibits two step structure [J. Mech. Phys. Solids 46, 1887 (1998)]. Such profiles obtained when impacts are using copper plates gauges mounted close (< ca. 5 mm) to face. We now show this second rise not evident either ceramic employed or thin cover front target.