Abstract
Flash radiographic method has been used to observe the propagation of plane shock waves in solids, particularly in laminated composites. Preliminary experiments on PMMA sample shows that the method is useful for determining the shock wave parameters in condensed media. Then the method has been applied to composite samples consisting of alternate layers of PMMA and aluminium. A plane shock wave was transferred to these bi-laminar system parallel to the laminations. The shock front in each PMMA plate was observed to be slightly curved because of the impedance mismatch between constituents. Across the shock front, an abrupt change in area ratio of constituents was also observed. The average Hugoniot data obtained for laminated composites have been compared with previous theoretical models.
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