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排序方式: 共有117条查询结果,搜索用时 15 毫秒
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Technical Physics - In this paper, we present the results of numerical simulation of explosive formation of a high-speed compact element from copper, steel, and aluminum cumulative liners combining... 相似文献
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A. F. Dresvyannikov M. E. Kolpakov E. A. Ermolaeva 《Russian Journal of Applied Chemistry》2016,89(3):354-359
Kinetic dependences describing the processes occurring on aluminum microparticles in aqueous solutions containing iron and molybdenum ions were determined. It was shown that the samples obtained contain iron, molybdenum, and aluminum in the elementary state in the absence of an oxide phase. 相似文献
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V. I. Kolpakov G. G. Savenkov K. A. Rudometkin A. Yu. Grigor’ev 《Technical Physics》2016,61(8):1141-1145
We consider the physicomathematical formulation of the problem of explosive formation of a penetrator from a low-sphericity copper lining. Calculations are made for the formation of a penetrator for a phlegmatized hexogen charge for two models of the behavior of the lining material (copper), and the results are compared with the experimental data. 相似文献
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A. F. Dresvyannikov M. E. Kolpakov E. A. Ermolaeva 《Russian Journal of Inorganic Chemistry》2017,62(3):380-385
We show the feasibility to prepare a disperse Fe–Al–Mo polymetal system by contact exchange in chloride-containing aqueous solutions. Reaction schemes are suggested to describe the processes that proceed on aluminum microparticles in aqueous solutions where the relevant metal ions are contained. The system is shown to be a precursor for intermetallic compounds, which are generated by high-temperature processes, e.g., spark plasma sintering (SPS). 相似文献
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The results of experimental and theoretical investigations of nonlinear acoustic phenomena (nonlinear losses, shift of resonance frequency, generation of the third harmonic, and nonlinear sound-by-sound damping) in polycrystalline zinc nonannealed and annealed resonating rods are presented. The measurements were carried out in the 10(-7)-10(-5) strain range at a frequency of about 3 kHz; the frequency of the weak ultrasonic pulse was about 270 kHz. The experimentally observed phenomena are described in frames of phenomenological equations of state containing elastic hysteresis and dissipative nonlinearity. The nonlinear acoustic parameters of these equations are determined by comparison between theoretical dependencies and experimental results. The influence of structural changes in zinc due to annealing on the nonlinear acoustic phenomena is shown. 相似文献
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Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 2, pp. 136–150, March–April, 1990. 相似文献