HYDRODYNAMIC THEORY AND HIGH PRESSURE FLOW IN SOLIDS.
Abstract
A plane shock wave is induced in a target by hit ting the target with a flying plate accelerated to a high velocity by a charge of explosive. The amount of attenuation of the shock wave is deter mined by observing the velocity of the free sur face of the target. It is found that shocks are attenuated more rapidly in Yule marble, Vacaville basalt, and alluvium than predicted by calcula tions based on the theory of hydrodynamics. Prob lems concerned with the measurement of the flat ness of the flying plates, with the condition of the plates, and with the recording method are discussed. Results of some of the shots in which flyer plates are recovered show that plates pro jected with a P-60 plane wave generator and 1 or 2-inch-thick charges of Composition B-3 frac ture near the back surface of the flyer plate. Because the spalled pieces are thin (about 1/5 of the thickness of the plate), and because the separation of the two pieces of the plate is necessarily small, the results of the attenuation studies are regarded as having considerable val idity. A computer code using the artificial viscosity method is used to calculate the flow innduced in a target by the impact of a flying plate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1963
- Accession Number
- AD0418125
Entities
People
- J.o. Erkman
Organizations
- SRI International