The 4th International Conference on Matter and Radiation at Extremes (ICMRE 2019)

535 / 2019-03-20 08:57:10

Investigation of dynamic fragmentation on laser shock-loaded tin at different phases via integrated diagnostic techniques

Dynamic fragmentation,laser shock-loaded,integrated diagnostic techniques,phase diagram

Plenary track > High Pressure Physics and Materials Science

This study mainly presents the experimental results of dynamic fragmentation from laser shock-loaded tin. In the experiment, tin samples were shock-loaded over sequential pressures ranging from 8GP to 42GPa. Integrated diagnostic techniques have been employed including four-frame imaging system (optical transverse shadowgraph), photonic Doppler velocimetry (PDV), and soft recovery. They provide shape of ejecta in dynamic fragment process, the loading parameters, as well as the penetration depth and fragment shapes in the post analysis of recovered device. These results are compared with the one-dimension Lagrangian hydrodynamics simulation. The crossed results over sequential pressures allowed us to have a better insight into the different dynamic processes of spall fracture and micro-spalling, which can help us to reveal underlying fragmentation mechanisms and develop reliable model for dynamic fragmentation of triangular-wave shocking metal.