PENETRATION OF THE MATERIAL OF PARTICLES FROM A HIGH-VELOCITY FLUX IN COLLISION WITH A STEEL OBSTACLE TO LARGE DEPTHSO. A. Dybov,a G. S. Romanov,b and S. M. Usherenkoa UDC 534.2 Experimental data on the punching of steel obstacles of thickness 200 mm are given, which show that, in collision and penetration, the particle and obstacle materials go out onto the rear side of the obstacle in the form of thin jets and their interaction with the package of electronic elements is responsible for the degradation of these elements located behind the obstacle. a Scientific-Research Institute of Pulsed Processes with Pilot Production, Minsk, Belarus; email: firstname.lastname@example.org; b A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 5, pp. 8-9, September-October, 2003. Original article submitted March 18, 2003.