EXPERIMENTAL DETERMINATION OF THE CRITICAL PENETRATION VELOCITY OF A POLYCONICAL PENETRATOR INTO SANDY SOIL AND CONCRETE
A.P. Kalmykov1,2, S.I. Gerasimov1,2,3, A.G. Ioilev1,3, V.I. Erofeev2, N.V. Lapichev1, S.A. Kapinos1, I.I. Kanygin1
1All-Russian Research Institute of Experimental Physics, Sarov, Russia
2Institute for Problems in Mechanical Engineering, Russian Academy of Sciences, Nizhny Novgorod, Russia
3Sarov Institute of Physics and Technology, Sarov, Russia
Keywords: concrete, soil, failure, ballistic launcher, penetration depth, recording
Abstract
Some experimental results on the penetration of polyconical penetrators made of EP637 steel into M400 concrete blocks and sandy soil are presented. The critical velocity is determined through successive iterations over a range of impact velocities characteristic of the transition from an intact penetrator (defined as a reduction in model length of less than 5%, excluding cavitator blunting) to a failed penetrator (defined as a length reduction exceeding 5% or a breach of penetrator integrity). The critical impact velocity above which penetrator failure occurs is identified.
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