Hugoniot elastic limits in oriented cyclotrimethylene trinitramine (RDX) at low pressure

The Hugoniot elastic limit (HEL) of oriented samples of cyclotrimethylene trinitramine (RDX) was examined. For several years, the orientation dependent HEL response has been considered a marker of orientation-dependent initiation behavior. We have previously noted inconsistencies with this hypothesis in higher-pressure experiments and static determinations of elastic-plastic behavior. Here, we will present a data set for four orientations of RDX shock impacted to a peak pressure of about 1 GPa. The results will be compared with previous experiments at higher pressure.