年間 4 号発行
ISSN 印刷: 1093-3611
ISSN オンライン: 1940-4360
Indexed in
MODELING ELASTIC STRESS FIELDS ARISING IN THE DURALUMIN TARGET ON IMPACT OF MACROPARTICLES ACCELERATED BY A COMBINED GAS DISCHARGE FACILITY
要約
A physical-mathematical model of the impact of a steel ball on a duralumin target has been developed. The diameter of the steel ball is 4 mm. The thickness of the duralumin target is 8 mm. The ball was accelerated to a speed of more than 4 km/s using a two-stage combined gas discharge facility. It is shown that the collision forms the compression and tension elastic stress fields in the target. As a result of the simulation of the target breakdown the size and shape of the crater were determined that are in good agreement with the experimental results. The results of simulation show that the impact of an absolutely solid ball on a soft barrier can be divided into three stages. At the initial stage of the ball penetration into the surface, compression stresses occurr in the material and shock waves were formed. Then the formation of a "plug" and the development of narrow bands of intense shear were observed. The motion of both the steel ball and plug as a whole was observed at the final stage of interaction.