PRELIMINARY PLANE WAVE STUDIES IN THE EARTH SHOCK TUBE,

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Abstract:

Propagation velocities of plane waves were measured on a series of shots in a three-foot diameter sand-filled tube. The experiments were run without redistribution of the sand, and further compaction occurred with each shot. The propagation velocity increased with successive shots. The stress-time and strain-time measurements at three feet from the plane wave source are given for Shot 10. The rise times of the stress and strain were so fast that the accuracy of the stress-strain plots are limited in the region of rising stress. It was felt that the stress-strain relation derived from smoothed curves might be more significant. The strain represents an average strain over 10 inches of material. The propagation velocity measured on Shot 10 was 745 feet per second. The specific gravity of the sand material was measured at about 1.8.

Author(s):
Thompson, Andrew A.
Author Organization(s):
BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
Supplementary Note:
Available only for reference use at DDC Field Services. Copy is not available for public sale.
Annotation:
Preliminary plane wave studies in the earth shock tube.
Pagination:
0009

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Illegible

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
BRL-TN-1343
Project Number(s):
DA-5B03-04-002
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
*SHOCK TUBES, SAND, SAND, SHOCK WAVES, MECHANICAL WAVES, PROPAGATION, VELOCITY, GRAPHICS, TERMINAL BALLISTICS
Report Date:
1960 Sep 01