Shock response of dry sand.

Reinhart, William Dodd ; Thornhill, Tom Finley, III ; Chhabildas, Lalit C. ; Vogler, Tracy John ; Brown, Justin L.

Sandia National Laboratories

关键词: Impact Shock;    Compacting;    Sand-Testing.;    Response Functions;    Shock Tests.;   

DOI  :  10.2172/913227
RP-ID  :  SAND2007-3524
RP-ID  :  AC04-94AL85000
RP-ID  :  913227

美国|英语

来源: UNT Digital Library

【 摘 要 】

The dynamic compaction of sand was investigated experimentally and computationally to stresses of 1.8 GPa. Experiments have been performed in the powder's partial compaction regime at impact velocities of approximately 0.25, 0.5, and 0.75 km/s. The experiments utilized multiple velocity interferometry probes on the rear surface of a stepped target for an accurate measurement of shock velocity, and an impedance matching technique was used to deduce the shock Hugoniot state. Wave profiles were further examined for estimates of reshock states. Experimental results were used to fit parameters to the P-Lambda model for porous materials. For simple 1-D simulations, the P-Lambda model seems to capture some of the physics behind the compaction process very well, typically predicting the Hugoniot state to within 3%.