Spinning Jets from Shaped Charges with Flow Turned Liners

摘要

The production of shear formed liners, the self spin effect of the jet, and theresults of tests with shear formed liners are discussed. The spin effect of shaped charged particles is caused by the distortion of the crystalline structure during the shear formating or flow forming process. In the case of statistically fired shear formed liners, rotation speed of individual jet particles of several hundred thousand rps can be measured. With antirotation, the crystalline structure imposed by shear forming compensates in their collapse process, leading to high penetration performance, for shaped charges fired with rotation. Good spin compensation can be attained at the relatively low rotation speed of 10 to 20 rps. The performance of a shear formed liner, compared with other liners, is 15 percent higher for short standoffs, and 30 percent higher for long standoffs in rotating shaped charges.