Pressure Changes in Water & 20% Gelatin Block due to Different Projectiles / 第三军医大学学报

ABSTRACT

The pressure changes in water and in 20% gelatin blocks produced by bullets of 7.62 mm and 5.56 mm calibre and spherical steel balls of 1.03gm were studied. The pressure was measured by the BJ-100 model transducer.It was demonstrated that there were three peak waves produced when the two kinds of bullets were fired through a water tank. The interval between the two peaks was longer in the waves produced by 7.62mm bullet than in those produced by 5.56mm bullet, the value of The pressure due to 5.56mm bullet was the largest, that due to 7.62mm bullet was the second, and that due to the spherical steel ball was the lowest.The fore-mentioned differences among the pressures produced by different projectiles were closely related to characteristic ballistics of the projectiles. And the pressure value detected and the pattern of the pressure change vary with the transient space eifect and the characteristics of tissue damage.