Dynamic Powder Compaction Processes

Polyakov, А. А.

doi:10.17804/2410-9908.2018.2.042-082

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…The carried out experimental researches practically prove theoretical researches and the created physico-chemical model of process [2,4,10,13]. During the experiment law of additivity of the absorption spectra of all components involved in the reaction and formed during it.…”

Section: Comparison With Experimental Datamentioning

confidence: 88%

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Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Gryadunova

Polyakov

Tokmakov

2018

SSP

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The article is devoted to the diagnosis of bearing units working with hydrocarbon mixtures. The diagnostic is based on the photometric method. This method allows you to determine the internal damage to the bearing unit at the stage of the appearance of the microcrack. The photometric method is based on changing the color of the indicator fabric. As the indicator substance, a bromine solution was used which had a dark brown color. If there is a leak, the hydrocarbon reacts with bromine molecules and a bright spot appears on the tape. Indicator fabric is applied to the bearing unit during assembling.The material of the article contains a model of the physicochemical process, which is the basis of the photometric method. Various stages of leakage of hydrocarbon mixtures through microcracks were studied. The results of the experimental studies are consistent with the theoretical propositions. The proposed diagnostic method can be used as a method for non-destructive testing of bearing units.

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Section: Comparison With Experimental Datamentioning

confidence: 88%

“…The reliability of the entire mechanism that is part of the machine, depends on the quality of the bearing unit operation [1][2][3]. One of the parameters of the bearing unit operation is the resource [4,5].…”

Section: Introductionmentioning

confidence: 99%

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Gryadunova

Polyakov

Tokmakov

2018

SSP

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Simulation of Impact Process of Soil Compaction

2020

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Introduction. During the construction of modern highways, much attention is paid to compaction of bases consisting of natural soils. They require the use of special equipment, including self-propelled machines, performing compaction in a continuous cycle. But when designing it, certain difficulties arise in determining the parameters of impact accelerators and the mass of the impact plate. The purpose of the work is to study the influence of the parameters of working equipment on the process of soil deformation.Materials and methods. To check the influence of the parameters of the tamper equipment on the compaction process, a method of mathematical modeling of the process using rheological models was chosen. The working cycle of impact ramming is divided into four phases. A mathematical description of the movement of the stamp and soil in each of the phases of movement is given. The change in the stress condition in time in the body of the soil half-space is considered.Results.Тhe time dependence of the soil stress condition was obtained for different stiffnesses of the spring impact accelerator and the change in the stamp mass. A joint analysis of the obtained dependencies showed that when designing impact equipment intended for compaction of naturally occurring soils, it requires matching the peak stresses from the mass of the stamp and the stiffness of the impact accelerators. This will make it possible to stretch the action of stresses in time, to form a compacted core in the soil half-space quickly and require a smaller number of strokes on one track to obtain the required material density.Discussion and conclusion. The proposed model of tamper equipment made it possible to consider the processes occurring in the soil half-space, to obtain comparative characteristics of the stamp mass and the rigidity of impact accelerators. The obtained data correlate well with the data of other authors. The results of the study may be useful to engineers involved in the development of new techniques of intensifying action.Financial transparency: the authors have no financial interest in the presented materials or methods. There is no conflict of interest.

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Dynamic Powder Compaction Processes

Cited by 2 publications

References 12 publications

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Simulation of Impact Process of Soil Compaction

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