Accession Number : AD0717832

Title :   Investigation of Pressure Waves During an Explosive Action Using the Method of Dynamic Photoelasticity (Concentrated Impulse in Single Phase and Polyphase Regions),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kostin,I. Kh. ; Smirnov,Yu. G. ; Strelchuk,N. A. ; Khesin,G. I. ; Shaposhnikov,V. N.

Report Date : 20 NOV 1970

Pagination or Media Count : 29

Abstract : The results of an experimental investigation of pressure waves due to concentrated explosions in homogeneous and nonhomogeneous media are reported. Two main problems were investigated: the nature and propagation of pressure waves in homogeneous semi-infinite regions and in nonhomogeneous regions. The experiments were recorded using polarized light with a photographic camera. Pressure waves due to an explosion in infinite plate: the pressure waves in this experiment consisted of a compression phase and a subsequent extension phase. The higher harmonics appearing after the extension wave are for practical purposes negligible. The ratio of compression phase to extension phase amplitudes depends on the size of the explosive charge and the distance from the epicenter of the explosion. It was found that the wavelength increases initially with increasing charge to a certain value. An additional increase in charge does not contribute to a further increase in wavelength. The propagation of pressures near the free and directly on the surface over the epicenter of the explosion and at distant points is governed by the superposition of straight lines and the reflected waves. (Author)

Descriptors :   (*DETONATION WAVES, MEASUREMENT), EXPLOSIVE CHARGES, PRESSURE, SHOCK WAVES, PHOTOELASTICITY, MECHANICAL WAVES, PROPAGATION, POLARIZATION, USSR

Subject Categories : Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE