Attenuation of Plane Shock Wave in PMMA

In this study, we measured the pressure histories of the shock wave after passing through different thicknesses of PMMA card gaps under ∅100 mm plane wave loading by the PVDF piezofilm stress gauges.The experimental results accord well with the simulated results by LS-DYNA, which shows that the shock wave follows the exponential attenuation principle with an attenuation exponent of 0.028 89.The comparison of this result with those of other researchers' indicates that the attenuation exponent of the solid materials characterizes their attenuation capability, but is affected by given conditions such as the shock wave and the size of experiment facility, thus it is important to choose the attenuation exponent reasonably.