scholarly journals The influence of technological parameters on physical and mechanical properties of surfaces

2019 ◽  
Vol 483 ◽  
pp. 012054 ◽  
Author(s):  
M V Mousokhranov ◽  
V V Kalmykov ◽  
E V Logutenkova
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Technological Parameters

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 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.

Neuromodel of the "Crusher mill" Mechatronic Complex

2021 ◽  
Vol 23 ◽  
pp. 470-483
Author(s):  
Vasyl Kalinchyk ◽  
Olexandr Meita ◽  
Vitalii Pobigaylo ◽  
Vitalii Kalinchyk ◽  
Danylo Filyanin
Keyword(s):  
Mechanical Properties ◽  
Contact Interaction ◽  
Normal Component ◽  
Physical And Mechanical Properties ◽  
Rock Cutting ◽  
Movement Direction ◽  
Shear Stresses ◽  
Technological Parameters ◽  
Plastic Properties ◽  
Vibration Cutting

To create a mechatron model of vacuum tube vibration system for rock cutting by flat auger tools based on physical and mechanical properties of processed array and kinematic characteristics of the instrument. The analytical model of the fracture process of rock cutting by tool vibration with considering of plastic properties of the massif were developed. The main technological parameters of massif vibrating cutting with normal variations were modeled: dependences of normal and tangential pressure in the zone of working body interaction with the medium, normal and shear stresses in the zone of destruction, rock characteristics of the medium, vibration parameters dependences on the characteristics of mechatronic system geometry of the contact area of flat incisors treated with medium. The choice of the computational model of the vibration rock cutting with the normal to the direction of movement of the working body fluctuations with considering arising from processes at once or disorders: the occurrence of compressive and tensile stresses were backgrounded. Main stages and interconnection options in the simulation of vibration cutting were established. Scientific novelty lies in the development of a method of analysis of contact interaction of roller working body molding machine with an array taking into account the changes in the stabilization process of physical and mechanical properties of the treated medium, the aim of which is to predict the required voltage and depth of the formed layer. The theoretical basis of rock cutting by flat auger tool taking into account the normal component of the vibration with respect to the movement direction allowing for the deformation of the rock mass and the contact interaction with the working body were established, that allows to improve the technology of drilling wells by reducing the power consumption of the cutting process. The results enable us to determine the parameters of power and kinematic conditions for the occurrence of the vibration cutting.

scholarly journals Drainage material produced from roofing waste

2018 ◽  
Vol 196 ◽  
pp. 04036
Author(s):  
Olga Lyapidevskaya
Keyword(s):  
Mechanical Properties ◽  
Energy Efficient ◽  
Fire Hazard ◽  
Physical And Mechanical Properties ◽  
Underground Construction ◽  
Technological Parameters ◽  
Contamination Source ◽  
Contact Points ◽  
Technical Requirements ◽  
Recycling Of Wastes

As of today, the development of energy efficient and recycling technologies seems to be urgent. This article considers the problem of recycling of wastes in roofing industry, which is a serious environmental contamination source and creates a significant fire hazard. We have made an attempt to create a new drainage material from roofing waste. This material has the appearance of fibrous board, which is made of trimmings of bitumen-impregnated roofing roll materials thermally bonded in contact points. The technological scheme of the producing of the material was developed. The material was tested to determine its physical and mechanical properties (tensile and compressive strength, water permeability and porosity) and to optimize its technological parameters. According to the results of the experiment it was founded that the material has sufficient physical and mechanical properties, meets the technical requirements for drainage materials and can be recommended for use in underground construction.

scholarly journals Effect Of Technological Parameters Of Production Of Tfp Preforms Of Gas Turbine Engine Blades On Their Physical And Mechanical Properties

2021 ◽  
Vol 12 (5) ◽  
pp. 56-64
Author(s):  
Orlov Maksim Andreyevich Et al.
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Gas Turbine ◽  
Physical And Mechanical Properties ◽  
Gas Turbine Engine ◽  
Strength Properties ◽  
Technological Parameters ◽  
Turbine Engine ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

The article discusses the features of the destruction of carbon fiber reinforced plastics on the basis of tfp-preforms produced using various stitching mode parameters, and provides for studies of their physical and mechanical properties and structure. The effect of the carbon fiber laying density and the piercing step of the aramid yarn on the elastic-strength properties of composites is shown. The optimal technological parameters for creating tfp-preforms of gas turbine engine blades were chosen.

scholarly journals Effect investigation of a thinning additive on the physical and mechanical properties of celsian ceramics obtained by slip casting

2020 ◽  
Vol 120 ◽  
pp. 144-150
Author(s):  
G. V. Lisachuk ◽  
Ya. М. Pitak ◽  
R. V. Krivobok ◽  
A. V. Zakharov ◽  
V. V. Voloshchuk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Slip Casting ◽  
Physical And Mechanical Properties ◽  
Planetary Mill ◽  
Maximum Temperature ◽  
Muffle Furnace ◽  
Technological Parameters ◽  
Optimal Amount ◽  
Second Stage ◽  
Casting Slip

The article discusses the physical and mechanical regularities of ceramics formation based on the BaO—Al2O3—SiO2 system by slip casting into gypsum molds, and also investigates the rheological properties of a slip based on сelsian and the physicochemical properties of products made from it. The samples were made according to the following technology: the first stage is synthesis of celsian in a muffle furnace at a temperature of 1200 °C with a maximum temperature holding for 2 hours. The synthesis products were ground in a planetary mill to a residue on the № 0063 sieve of no more than 0.2 %. Then, slips with different moisture content without additives and with the addition of 0.10, 0.15 and 0.20 wt. % thinning additive Dolapix PC 67 were made. The second stage is to obtain samples by casting slip into gypsum molds. Firing of products took place in a muffle furnace at a temperature of 1350 °C with a two-hour holding. The optimal amount of thinning additive in the celsian slip was determined, which corresponds to 0.10 wt. %. It was found that, in the studied area of technological parameters, the material acquires the best properties at a sample firing temperature of 1350 °C and is characterized by the following indicators: water absorption — 10.20 %, apparent density — 2.15 g/cm3, open porosity — 21.04 %.

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