PHENOMENA OCCURRING AT EXPLOSIVE METAL INTERFACES (AN EXPERIMENTAL AND THEORETICAL STUDY OF RUNNING DETONATIONS ON METAL PLATES).
Final rept. Dec 64-Apr 66,
PHYSICS INTERNATIONAL CO SAN LEANDRO CA
Pagination or Media Count:
In Volume 1 of this two-volume report, tests were conducted to study the running detonation problem in plane explosive layers in contact with thin 6061-T6 aluminum alloy plates. A total of 21 explosive experiments was conducted, with 11 of them used to provide data on particle velocities and plate angles as a function of chargemass ratio. Velocities ran to over 0.3 cmmicrosec, with total plate rotation over 25 degrees, for cm ratios up to 10.2. Investigations on residual strains, cross-sectional shear effects, spalling, work-hardening effects, and variations in detonation velocity due to curvature of the shock front were conducted. The Taylor hypothesis was experimentally verified, although moderate random angular variations were observed. The experimental technique was facilitated through use of two-view, 480,000 framesec color photography, high-speed flash X-ray photography, and self-shorting contactor pins. Several specimens were gradually decelerated and recovered for terminal measurements and microscopic examination. From the high-speed photographs, instantaneous deformation patterns could be reconstructed after air refraction effects had been compensated for. Three computer programs simulated the explosive experiments and yielded a close correlation to observed data, under the simplifying assumption of elasticperfectly-plastic behavior.