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Damage of brittle materials at super-deep penetration

Owsik J., Jach K., Noga J., Usherenko S., Malamud V., Usherenko Y.

Journal of Technical Physics

2009

Vol. 50, no 4

343-352

Interaction of glass arid silicon monocrystals with clusters of dust particles is described in the paper. Protective metallic shells become a source of new damage factors in conditions of super-deep penetration (SDP). Penetration of micro-jets into a glass sample volume occurs as precession with respect to the axis of a jet motion in a barrier. The form of bands of superficial damages corresponds to sawtooth change of parameters of electromagnetic field which controls motion of a dense plasma micro-jet. The energy anomaly factor of the order of Eg/ESi ≈ 8.4 was found from comparison of the damages in glass and silicon.

The physics of superdeep penetration phenomenon

Owsik J., Jach K., Usherenko S., Usherenko Y., Figovsky O., Sobolev V.

Journal of Technical Physics

2008

Vol. 49, no 1

3-25

While solving the problem of superdeep penetration, a dilemma appears: will we deal with an unusual mechanism of effective transformation of impact energy of a clot into energy of separate strikers motion or will it be a process of additional energy emission? It was shown that all possibilities of explanation of the decrease in resistance to a striker at its movement in a solid body due to the mechanism of economical use of the kinetic energy, are considered (so-called dead end was stated). Estimations of a minimum energy necessary for superdeep penetration have been performed. The obtained results have proved that the kinetic energy of a collision of a clot of discrete (separate) strikers with a barrier makes only 5-10% of the total amount of the energy loss. It was shown that the process of cavitation of microcavities in dense plasma is the source of additional energy, providing implementation of superdeep penetration.

Analysis of shock interaction under super deep penetration effect

Owsik J., Usherenko S., Meyers M., Zarwalska A.

Journal of Technical Physics

2001

Vol. 42, no 2

193-201

When macrobodies undergo collision, macrocraters are formed for which the ratio of crater's depth to striker diameter does not exceed 10. At the end of the 70's, an anomalous effect of formation of microcraters with relative depth of about [10^2-10^4] of particle size has been detected. Analysis of the experimental results made it possible to reveal the existence of a narrow impact interaction zone within which craters-channels are produced with a good repeatability. Evidence of a limited relative depth under macroimpact is explained by restrictions imposed by energy intensity of impact interaction in a barrier material.