Spatially resolved shock response at dry metallic multi-material interfaces

Mark A Collinson, David J Chapman, Daniel E Eakins
2014 Journal of Physics, Conference Series  
The high strain-rate behaviour of multi-component systems is often dominated by mediation at material interfaces. The extent to which a materials microstructure influences dynamic friction and relative sliding response remains an area of active study. Initial results from a study on the behaviour of dry metallic interfaces under the passage of a controlled loading wave are presented. Held in close contact along a single planar interface, oblique shock waves were generated along the boundary by
more » ... ng the boundary by direct copper flyer impact at velocities in the range 250 m s −1 -300 m s −1 . Both the 100 mm and 13 mm bore gas guns located at Imperial College London were utilised for this purpose. A line-imaging velocity interferometer system for any reflector (VISAR) system was used to directly record the velocity profile across the contact interface, providing a measure of any spatially dependent response while photon doppler velocimetry (PDV) was used to determine the far field response. Comparisons of these results against current generation hydrocode models are presented, with significant deviations from the computationally predicted results identified in the peak shock state immediately following shock breakout.
doi:10.1088/1742-6596/500/11/112019 fatcat:ir24vpvuvng4rb6a6whn76hgyq