scholarly journals THEORETICAL RESEARCH OF THE SCAFFOLDER AND SOIL INTERACTION

2017 ◽  
Vol 2 (3) ◽  
pp. 19-23
Author(s):  
Михаил Канаев ◽  
Mikhail Kanaev ◽  
Олег Карпов ◽  
Oleg Karpov ◽  
Сергей Васильев ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Humus Horizon ◽  
Physical And Mechanical Properties ◽  
Theoretical Research ◽  
Design Stage ◽  
Mineral Fertilizers ◽  
Technological Parameters ◽  
Additional Energy ◽  
Gauge Link ◽  
Humus Layer

The purpose of research is to improve the dosing of mineral fertilizers sowing unit, depending on the physico-mechanical properties of the soil. In modern technologies of precision farming with differentiated application of mineral fertilizers, data from various sensors, results of analyzes of soil samples and aerial photography are mainly used, without taking into account factor such as the depth of the humus horizon, which largely determines the soil fertility. On the basis of the Samara State Agricultural Academy, studies are underway on the effect of the depth of the humus horizon on the fertility of the soil. Several machines have been developed for differentiating mineral fertilizers with spreader and cultivator. Currently, a system of differentiated application of mineral fertilizers is being developed for sowing agricultural crops and it is planned to produce a set of equipment for a standard seeder UCS-8 Vesta. A constructive scheme of the device for determining the traction resistance is presented, which is closely related to the depth of occurrence of the humus layer. The main working element of this device is a deformer in the form of a knife, with a dihedral grinding. The article presents theoretical studies of the effect of forces acting on a deformer. Based on the results of the theoretical justification of the technological process of the proposed scheme for determining the traction resistance, the load dependencies on the strain gauge link were derived depending on the drag resistance of the deformer, which is determined by its basic design and technological parameters and the physical and mechanical properties of the soil. The obtained dependences of the traction resistance of the working organs of the tillage implement will theoretically determine the additional energy costs from the introduction of the deformer in the design stage at the design stage of the machine and outline the directions for their optimization.

scholarly journals ДОСЛІДЖЕННЯ ПРОЦЕСУ ДУБЛЮВАННЯ ДЕТАЛЕЙ ОДЯГУ ІЗ ШТУЧНОГО ХУТРА

2021 ◽  
Vol 146 (3) ◽  
pp. 129-138
Author(s):  
А. П. Бусько ◽  
А. Т. Арабулі
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Mathematical Models ◽  
Materials Science ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Design Stage ◽  
Technological Parameters ◽  
Systematic Analysis

Analysis of the features of the structure of faux fur of different raw materials to improve the shape stability of products and increase the exploitation process. Determination of technological parameters of the process of duplication of garments made of faux fur at which a standardized level of quality of the duplication operation is duplicated.Performing experimental investigation to determine the physical and mechanical properties of artificial fur. The work used the well-known methods for determining the flexural stiffness, air permeability and hydrophobicity of artificial fur were used in the work. Theoretical and experimental investigation is based on the basic principles of textile materials science. Systematic analysis and generalization were used to determine the state of the question and set the task. The experiment of the process of duplication of faux fur parts was planned and two-factor mathematical models were obtained, which are adequate to the researched process. The influence of the duplication process on artificial fur of different raw material composition is analyzed. The values of indicators of physical and mechanical properties of modern faux fur are determined. On the basis of two-factor mathematical models, recommendations are given on the choice of technological parameters of duplication of garments made of faux fur. The regularities of the process of duplicated of garment parts made of faux fur with adhesive gasket material under static loading are established. The values of indicators of physical and mechanical properties of modern faux fur are determined. The obtained scientific results allow at the design stage to rationally select faux fur in the manufacture of outerwear, and certain rational technological parameters of the process of duplication of garments from faux fur allow to ensure a standardized level of quality of duplication operation while minimizing energy losses of equipment.

scholarly journals RESEARCH OF PHYSICAL AND MECHANICAL PROPERTIES OF WOOD-FIBER MATERIALS

2020 ◽  
pp. 451-457
Author(s):  
Aleksandr Yur'yevich Vititnev ◽  
Yuriy Davydovich Alashkevich ◽  
Natal'ya Geral'dovna Chistova ◽  
Roman Aleksandrovich Marchenko ◽  
Venera Nurullovna Matygullina
Keyword(s):  
Mechanical Properties ◽  
Wood Fiber ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Strength Properties ◽  
Grinding Process ◽  
Technological Parameters ◽  
Fiber Materials ◽  
Traditional Construction

This paper presents the results of experimental studies of the physical and mechanical properties of wood-fiber boards of the wet production method when regulating the design and technological parameters of the grinding process. This allowed us to determine the influence of the working clearance between the grinding discs and the concentration of fibre mass with the subject to of quality change wood fiber after defibrator using the developed construction of the disc fibrillation action on the physico-mechanical properties of boards. As a result of the experiment, regression models were obtained that adequately describe the studied grinding process and allow predicting the values of physical and mechanical properties of the finished product depending on the established  parameters process. A comparative analysis of the size and quality characteristics of the fiber semi-finished product and its fractional composition when using a developed construction the disc of refiner fibrillation action and a traditional design used in industry is carried out. The preferential efficiency of the grinding process under the fibrillating effect the disc of refiner in comparison with the traditional construction disc of refiner is established. As a result, there is a significant improvement in the quality indicators of the fiber semi-finished product and its composition due to the formation and predominance in the total mass of long and thin, respectively, flexible fibrillated fibers with high tile-forming properties, which allows to increase the strength properties of the product (by 20–25%), without using binding resins.

scholarly journals METHOD OF SAMPLE MANUFACTURING FROM MULTILAYER COMPOSITE MATERIALS FOR STUDYING THEIR MECHANICAL PROPERTIES

2018 ◽  
pp. 16-23
Author(s):  
Alsaid Mazen ◽  
Ali Salamekh
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Testing Machine ◽  
Physical And Mechanical Properties ◽  
Polymer Composite Materials ◽  
Technological Parameters ◽  
Cutting Out ◽  
Method Of Production ◽  
Economic Considerations

In the last decades there is increasing the need to apply polymer composite materials in different industries, particularly in shipbuilding. There are developing single structures made from polymer composite materials to be used on board ships. The article focuses on technology of manufacturing slabs from polymer composite materials to carry out mechanical testing in the laboratory special standard units. Mechanical properties of polymer composite materials depend on molding technologies. There has been described a technology of sample manufacturing from polymer composite materials reinforced with glass fiber mat with fiberglass plastics. The technique of testing the specified samples for tensile strength has been considered. The sizes and shapes of the samples as well as the technological parameters of the manufacturing process have been validated, depending on the standard requirements and the technological features of the testing machine. The physical and mechanical properties of the components that make up the composite materials are considered. The sequence of stacking layers for preparation of plates from composite materials is indicated. The dimensions of the plates for cutting out finished samples are determined, depending on the method of production. The way of laying plates from composite materials has been chosen on the base of economic considerations and conditions of accessibility. The obtained results of mechanical properties can be used in solving problems of application of polymer composite materials in shipbuilding, for example, in manufacturing superstructures of some dry cargo vessels.

scholarly journals Theoretical justification of the main parameters of the coulter group of the sod seeder for strip sowing

2020 ◽  
Vol 21 (3) ◽  
pp. 321-331
Author(s):  
V. A. Sysuev ◽  
S. L. Demshin ◽  
D. A. Cheremisinov ◽  
M. S. Doronin
Keyword(s):  
Soil Layer ◽  
Mineral Fertilizer ◽  
Theoretical Research ◽  
Design Stage ◽  
Mineral Fertilizers ◽  
Theoretical Justification ◽  
Torsion Spring ◽  
Operating Modes ◽  
Working Bodies ◽  
Compact Design

Increasing the efficiency of direct strip sowing of grass seeds by means of seeders with active furrow openers is possible when seed and fertilizer working bodies are removed from the zone of operation of disk milling cutters. A structural and technological scheme of the coulter group of the sod seeder for strip sowing is proposed, which consists of a milling furrow opener, fertilizer and seed coulters mounted on leashes in the form of torsion spring trailers, and a rolling roller. To ensure high quality multilevel sowing of grass seeds and granules of mineral fertilizers, it is necessary at the design stage to determine the length of the fertilizer coulter sides, which prevent premature shedding of soil from the furrow walls until the mineral fertilizer granules reach the bottom of the furrow, and the minimum allowable distance between the fertilizer and seed coulters, which allows to cover the granules of mineral fertilizers with soil completely while maintaining the compact design of the coulter group. In the course of theoretical research, mathematical dependences were obtained to determine the rational parameters and operating modes of the coulter group of the proposed design, which will ensure a minimum spread of mineral fertilizer granules over the depth of incorporation and a high stability of the soil layer thickness between mineral fertilizer granules and grass seeds. Rational parameters of the coulter group of the proposed design are determined for the range of operating speeds of the sod seeder for strip sowing: angle at the apex of the shank fertilizer coulter in the horizontal plane is 15-20º, the length of the fertilizer coulter sides is 0.040-0.045 m, the width of the fertilizer coulter bell is 0.02 m, minimum permissible distance between the fertilizer and seed coulters is 0.14-0.16 м.

Study of Phase Formation Processes in a Three-Component System of Diopside, Porcelain, Alumina

2013 ◽  
Vol 872 ◽  
pp. 201-205 ◽  
Author(s):  
Valeriy M. Pogrebenkov ◽  
Kirill S. Kostikov
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Phase Formation ◽  
Crystalline Phase ◽  
Physical And Mechanical Properties ◽  
Theoretical Research ◽  
Formation Processes ◽  
Component System ◽  
Technical Ceramic ◽  
Theoretical Investigations

This article presents the study of phase formation at nonductile component interacting (diopside, alumina and pre-synthesized porcelain). Technical ceramic compositions with improved physical and mechanical properties are developed on the basis of these components. A theoretical research has been conducted, as a result of which a triple forecasting diagram is built in the system of diopside - alumina - porcelain. The diagram reflects 10 main areas with a major crystalline phase for the composition. Theoretical investigations are proved out by experimental data.

scholarly journals ДОСЛІДЖЕННЯ ЕНЕРГОВИТРАТ ТАРІЛЧАСТИХ ЖИВИЛЬНИКІВ ДЛЯ СИПКИХ МАТЕРІАЛІВ

2021 ◽  
Vol 148 (4) ◽  
pp. 67-76
Author(s):  
О. П. Бурмістенков ◽  
Т. Я. Біла ◽  
В. В. Стаценко
Keyword(s):  
Mechanical Properties ◽  
Mathematical Models ◽  
Rotation Speed ◽  
Bulk Material ◽  
Physical And Mechanical Properties ◽  
Technological Parameters ◽  
Plate Rotation ◽  
Plate Feeder ◽  
The Relationship ◽  
Continuous Plate

Creation  of  mathematical  models  that  allow  determining  the  relationship  between  the design and technological parameters of the plate feeders and the energy consumption arising during their operation. Methodology.  The  work  uses  the  classical  mechanics  principles,  the  contact  interaction  of  solids theory and the mathematical modeling method. Findings.  The  paper  considers  the  design  and  operation  principle  of  a  continuous  plate  feeder, defines its main design and technological parameters. The factors that create mechanical loads on the drive of  the  feeder  plate  are  investigated.  Mathematical  models  have  been  developed  that  make  it  possible  to determine the moments of resistance and the power consumed by an electric motor during the equipment operation. The proposed models make it possible to determine the load on the drive in static and dynamic operation modes and take into account the design, technological parameters of the equipment and the bulk material physical and mechanical properties. The study results of the friction coefficients influence, the knife position and the force of its pressing on the plate surface, the plate rotation speed on the loads acting on the electric drive are presented. It has been found that the drive calculation is expedient for the mode in which the distance between the knife edge and the rotation axis of the plate is maximum, which corresponds to the operation at maximum load. It has been determined that a change in the feeder technological parameters (plate rotation speed, knife position) can lead to a change in the load on the electric drive by 86%, which must be taken into account when choosing a drive. Originality.  Mathematical  models  of  the  continuous  plate  feeder  operation  have  been  developed, which make it possible to determine the relationship between the design and technological parameters of the plate feeders and energy consumption. Practical value. The results obtained make it possible to determine the load on the plate drive by the known design, technological parameters and bulk material physical and mechanical properties.

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