High-velocity impact of steel particles on targets made of porous copper

Merzhievskii, L. A.; Chistyakov, V. P.

doi:10.1134/s0010508214040212

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…This is approximately 9% lower than in steel, 3.2 times less than in zinc and 3.8 less than in AMC-n (Voytenko & Bugaets, 2016). It is also confirmed by the pictures of destruction and weakening of barriers made of porous copper under high speed penetration of steel ball into them (Merzhievskii & Chistyakov, 2014). The dependence of the channel depth in rocks on the porosity for the case of shaped penetration in the first approximation, is linear (Voitenko & Shukurov, 2016), as well as for porous metals at high velocity impact of a steel ball (Merzhievskii & Chistyakov, 2014).…”

Section: Features Of Brittle Rocks and Geomaterials Destructionmentioning

confidence: 77%

Peculiarities of britlle and ductile materials destruction and deformation during the explosion of industrial shaped charges

Voitenko¹,

Kravets²,

Shukurov³

et al. 2017

Min. miner. depos.

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Purpose. To study the laws of deformation and destruction of brittle and ductile rocks and concretes under explosion of industrial shaped charges. Methods.In experiments, the following methods of investigation were used: method of contact sensors for determination of jet velocity; determination of the ultrasonic wave velocity in the concrete samples; methods of optical and electronic microscopy; X-ray phase analysis; measuring and visual analysis of the dimensions and nature of deformation and destruction zones.Findings. The work describes the experimental data on the destruction of barriers made of concrete, granite, steel ST 3, AMC-n alloy, and zinc by the explosions of shaped charges of serial production with porous liners. Calculation formulas for estimating the radius of a destruction zone of geomaterials and rocks in case of a semi-infinite barrier are suggested. The calculation method is based on the estimation of energy impact on the rock by jet penetration velocity into the barrier. Jet velocities are determined experimentally and by engineering methods. The reasons for deviations in the hole shape and deflection of the destruction zone from the symmetry axis were determined.Originality. The modes of penetration of shaped jets into rocks of different porosity, the size of the fracture zone around the hole and the causes and mechanisms of the deviations of the hole shape from the symmetric one are established. Practical implications.The results of the research will be used to design blasting-and-perforation operations in geotechnological wells and can be used to design initiating devices for borehole charges.

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Section: Features Of Brittle Rocks and Geomaterials Destructionmentioning

confidence: 77%