Modelling heat and mass transfer processes in capillary-porous materials at their grinding by pressure release

Просвирников, Д. Б.; Baigildeeva, E. I.; Sadrtdinov, A.; Фомин, А. А.

doi:10.1109/icieam.2017.8076443

Cited by 23 publications

(6 citation statements)

References 36 publications

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“…The main indicator of the WPSC is its thermal conductivity [14]. As a result, we propose here a mathematical model that allows studying the transfer of thermal energy in a wood polymeric sand composite with inclusions of sand and wood in the form of sawdust, chips, shave and lump waste.…”

Section: Scientific Backgroundmentioning

confidence: 99%

Thermal Insulation Properties of Wood Polymeric Sand Composite

Стородубцева

Aksomitny

Sadrtdinov

2018

SSP

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The mathematical model of a wood polymeric sand composite has been developed, which allows studying the thermal insulation properties of a composite material, taking into account the ratio of wood filler to the other components, the method for obtaining samples, and the type of wood filler. The technique of modeling and analysis of the obtained results is given. By mathematical modeling it was established that the wood polymeric sand composite has thermal insulation properties 2-3 times better than that of construction materials based on concrete. Construction materials based on the developed composite have a higher heat capacity than pure wood, which allows them to better maintain the constancy of the temperature inside the premises with significant daily fluctuations in the external temperature. A series of practical tests were conducted to evaluate the reliability of the results obtained. The discrepancy between theoretical and practical results does not exceed 5%.

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Section: Scientific Backgroundmentioning

confidence: 99%

Thermal Insulation Properties of Wood Polymeric Sand Composite

Стородубцева

Aksomitny

Sadrtdinov

2018

SSP

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“…For wood composites based on thermoplastic polymers, the complexity of obtaining compositions with high filling is associated with a low degree of wetting by the hydrophilic surface of wood filler with hydrophobic polymers. The use of bonding additives converts the hydrophilic surface of the wood fiber to hydrophobic, as well as the polymer binder, which contributes to increasing the bond between the components, under conditions when the surface energy of the wood filler reaches the value of the polymer binder in the molten physical state [9][10][11][12]. An analysis of the results of the researches in this area reflects that the effective for a wood composite bonding additive has the following functional characteristics: the ability to create an interlaced bond or segmental crystallization with a polymeric binder and the ability for highstrength interactions with wood filler through covalent, ionic or hydrogen bonds.…”

Section: Analysis Of Composite Materialsmentioning

confidence: 99%

Composite Railroad Ties Obtained by the Energy Efficient Recycle of Wooden Railroad Ties

Stepanov

Тимербаев

2018

SSP

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The article presents the result of research in the field of processing wooden railroad ties and thermoplastic polymer household waste with obtaining composite railroad ties under conditions of energy efficiency of technological processes. The wood of the used wooden ties contains a significant proportion of chemical compounds based on creosote. As a result of the thermal and mechanical action, the creosote compounds in the wood form hydrophobic surfaces, thereby fulfilling the function of the bonding additives. Under the above-mentioned conditions, hydrogen bonds are formed between the components of the wood composite, that, in its turn, allows achieving the task of creating a functional composite, which varies in the compound of elements and the modes of production processes. Experimental studies were held on the nature of justification and correction of theoretical studies. The experimental stand of composite production is realized on the principle of energy efficient cooling cycles of the obtained composite with heat transfer for heating the initial components. The obtained results of experimental studies exceed the regulation values by every measure. The comparison justifies the quality of the experimental samples obtained with respect to these values.

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“…Increased dynamic activity of the technological system adversely affects the quality of the processed surface and the performance of the process [8][9][10][11][12]. The acute problem of processing products of low rigidity is in mechanical engineering, in particular, aircraft industry, woodworking, processing of other materials [13][14][15][16][17][18][19]. The above mentioned fully applies to woodworking, in particular, to the milling of the profile surfaces of the peripheral segments resulting from the cutting of logs [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

The Processing of the Profile Surface of the Work-Pieces, Characterized by Low Rigidity

Фомин

Гусев

Тимербаев

2020

SSP

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This work indicates that the prediction of the geometric indicators of the quality of the machined surface in the design of technological operations for milling a profile surface of work-pieces with low rigidity is possible, on the basis of an analysis of the elastic displacements of the technological system elements, the flexural rigidity of the work-piece as a function of its initial dimensions, the locating chart and the physical and mechanical characteristics of the material being processed. The article describes the characteristics of the elements of the technological system for the profile milling of work-pieces of low rigidity; The analytical dependencies linking the elastic displacements of the work-piece during the processing of various wood species with elements of the milling mode and the design parameters of the mill are given. Extreme total elastic displacements of the technological system during the cutting process are determined. Mathematical models of the maximum geometric error of the machined surface, as a function of the work-piece's flexural rigidity and the spindle unit, are established. Based on the results of the analysis, recommendations for improving the accuracy of the product were developed.

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Modelling heat and mass transfer processes in capillary-porous materials at their grinding by pressure release

Cited by 23 publications

References 36 publications

Thermal Insulation Properties of Wood Polymeric Sand Composite

Thermal Insulation Properties of Wood Polymeric Sand Composite

Composite Railroad Ties Obtained by the Energy Efficient Recycle of Wooden Railroad Ties

The Processing of the Profile Surface of the Work-Pieces, Characterized by Low Rigidity

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