Abstract
The article presents the analysis of morphological peculiarities of temporal pulsating cavity under the experiment conditions using ballistic gel. In the course of the experiment there was used Fort-12 gun and standard ammunition of 9*18 mm caliber. A 250 Bloom ballistic gel (recommended by the leading researchers) was chosen as a simulator. The preparation of gel blocks was conducted using a classical methods suggested by Fackler and Malinowski, the concentration is 10 %, cooled down to the temperature of 4 °C (the exposition time is 48 hours). The visualization of a wound tract and cracks in gel left by the gunshot projectile and liquidation of the temporary pulsating cavity was conducted with the use of a contrasting water-soluble dye. After that the blocks were photographed and cut across the wound tract into plates of 1 cm width. Each section was scanned individually with the use of a flatbed scanner. In order to evaluate the damaging effect of the wounding projectile there are used standard calculation methods: Fackler’s wound profile (WP), the total crack length method (TCL), the polygonprocedure (PP).
Highlights
OF INPUT BALL INJURIES ON SOLID OBSTACLESIt was determined that with the shots from rifles MP-512, which has a barrel with sixth rifling, the damage from action from balls with domedor wadcutter-type warhead on solid obstacles had the shape of hexagonal defect, but the shot balls of point type had hexagonal abrasion ring defect, corresponding to the number of barrel rifling
Experimental shots were carried out on thin cardboard sheets from two air rifles of sixth and twelfth barrel rifling with expansion bullets of 6 brands having 4 types of head-terms: domed or roundnose, wadcutter, point and hollow point
It was determined that with the shots from rifles MP-512, which has a barrel with sixth rifling, the damage from action from balls with domedor wadcutter-type warhead on solid obstacles had the shape of hexagonal defect, but the shot balls of point type had hexagonal abrasion ring defect, corresponding to the number of barrel rifling
Summary
It was determined that with the shots from rifles MP-512, which has a barrel with sixth rifling, the damage from action from balls with domedor wadcutter-type warhead on solid obstacles had the shape of hexagonal defect, but the shot balls of point type had hexagonal abrasion ring defect, corresponding to the number of barrel rifling. When fired from rifles Diana350M, which has a barrel with twelfth rifling, damage from balls with domed or wadcutter warhead was produced in the shape of defects with serrated edges and an abrasion ring, which reflected the barrel rifling that generally resembles pinion teeth. For the first time the possibility of determining the number of rifling in the barrel by means of morphological features of bullet injuries from airguns on solid obstacles is proved. Асистент кафедри судовомедичної експертизи Харківської медичної академії післядипломної освіти
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