Shock driven extrusion as a tool for studying shear localization

Synchrotron x-ray imaging experiments were conducted in which a thin sample of Ti, V, or SS was shock loaded while in contact with a perforated Ta plate. This geometry caused the sample material to extrude forward through the Ta. By selection of the hole size and layer thicknesses, this process was made sensitive to the shear strength of the sample, even for drive pressures up to 10 GPa. Data from these tests have been paired with finite element simulations to assess shear localization models, which has enabled the calibration of a new model. Prospects for an analogous PDV-only technique will be discussed.