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1

Influence of the Striker Material on the Results of High-Speed Impact at a Barrier

Voitenko Yuri, Zakusylo Roman, Zaychenko Stefan

Central European Journal of Energetic Materials

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2021

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Vol. 18, no. 3

405--423

EN

In this work the influence of the characteristics of the material of the striker (cumulative jet or projectile), moving at speeds of 2-10 km/s, on the volume of the resulting crater in a metal target, has been studied. The dependence of the crater volume in an aluminum alloy target of Cu-Al, W-Cu-Pb-Al composites, and steel St45 for a PTFE-Cu composite, were investigated. The outer diameter and height of the shaped charges were 26 and 28, and 31 and 33 mm, respectively. The mass of the explosive (phlegmatized hexogen) in these charges was 10 and 18 g. A comparison was made between the ratios of the kinetic energy of the striker to the volume of the crater formed for the composites PTFE-Al, PTFE-Cu, Cu-Al, Ni-Al, W-Cu-Pb, and porous materials Cu and Al. It was demonstrated that the chemical interaction of the components of the porous Cu-Al and Ni-Al composites during penetration into the barrier is possible at an impact velocity of at least 2-3 km/s and a porosity of at least 30%.

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Моделирование процесса перемещения сыпучей cреды по ситу виброударного грохота

Evtukov S. A., Sizikov V. S., Rajczyk J.

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

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2016

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Z. 22 (172)

86-94

RU

Выполнено математическое моделирование процесса взаимодействия рабочих элементов виброударного грохота и транспортируемого по его ситу слоя сыпучего материала. Приведен пример расчета основных характеристик динамики взаимодействия элементов грохота и скоC рости транспортирования слоя по ситу, колеблющемуся в виброударном режиме.

EN

The mathematical modelling of the interaction process of vibroimpact screen working elements and being transported on its sieve layer of bulk material has been performed. The specific example of the calculation of basic parameters of screen elements interaction dynamics and sieve oscillating in vibroimpact regime is submitted.

3

Research on influence of impact of microparticles and sewing needles on destruction of solid bodies

Khristoforov B. D.

Engineering Transactions

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2010

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Vol. 58, iss. 3/4

131-138

EN

Impact of powders and sewing needles accelerated by explosion on various obstacles has been studied. Formation of channels up to 100 particle diameters in length has been observed when corundum and tungsten powders impacts on steel and duralumin at speeds up to 2 km/s. A mechanism of such super deep penetration of powder jets into metals has been proposed. The possibility of destroying by needles such objects as plexiglass blocks, antimeteorite screens, containers with elastic and explosive materials with a released energy exceeding the energy of needles has been shown. At impact speeds up to 400 m/s the depth of needles penetration into metals is 3-5 times higher than the one calculated for pointed rods at plastic work. The obtained results can be useful for modeling of impact of meteorites, space scraps and technological wasteson space aircrafts and their components.