Analysis of Possible Application of Temperature Dependences of Processed Materials’ Physical and Mechanical Properties to Define the Maximum Workability Temperature

2017 ◽  
Vol 737 ◽  
pp. 114-118 ◽  
Author(s):  
D.S. Vasilega ◽  
V.A. Zyryanov
Keyword(s):  
Mechanical Properties ◽  
Extreme Values ◽  
Experimental Studies ◽  
Cutting Temperature ◽  
Physical And Mechanical Properties ◽  
Surface Wear ◽  
Minimum Surface ◽  
Nickel Based Superalloy ◽  
Temperature Dependences ◽  
Cutting Path

The results of experimental studies of the different machinability group materials’ characteristics, including tool steel DIN C125W, heat-resistant steel (C - 0.1%, Si - 0.6%, Cu - 0.3%, W - 0.1%, Mn - 0.4%, Ni - 23%, P - 0.01%, Cr - 12%, S - 0.01%, V - 0.01, Mo - 1.5%, Ti - 3%, V - 0.001%, Al - 0.6), nickel-based superalloy (Fe - 4%, C - 0.1%, Si - 0.6%, Mn - 0.5%, S - 0.01%, P - 0.01%, Cr - 15%, Ce - 0.01%, Mo - 4%, W - 6%, V - 0.3%, Ti - 2%, Al - 2%, B - 0.01%), the changes in the minimum surface wear, maximum cutting path, and cutting temperature in the processing of these materials, as well as the experimental data analysis showed that the extreme values of changes in the materials’ physical and mechanical properties under the temperature impact can be defined as the minimum surface wear temperature and maximum cutting path temperature, that is, the conditions corresponding to the maximum workability of the materials. It is possible to use the materials physical and mechanical property dependence on temperature for defining the maximum material workability temperature when processing it by cutting. The article suggests a method to define the maximum material workability temperature.

Effect of Wood Filler Concentration on Physical and Mechanical Properties of PLA-Based Composites

2021 ◽  
Vol 887 ◽  
pp. 110-115
Author(s):  
G.A. Sabirova ◽  
R.R. Safin ◽  
N.R. Galyavetdinov
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Composite Materials ◽  
Impact Strength ◽  
Wood Flour ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Filler Concentration ◽  
High Concentration

This paper presents the findings of experimental studies of the physical and mechanical properties of wood-filled composites based on polylactide (PLA) and vegetable filler in the form of wood flour (WF) thermally modified at 200-240 °C. It also reveals the dependence of the tensile strength, impact strength, bending elastic modulus, and density of composites on the amount of wood filler and the temperature of its thermal pre-modification. We established that an increase in the concentration of the introduced filler and the degree of its heat treatment results in a decrease of the tensile strength, impact strength and density of composite materials, while with a lower binder content, thermal modification at 200 °C has a positive effect on bending elastic modulus. We also found that 40 % content of a wood filler heated to 200 °C is sufficient to maintain relatively high physical and mechanical properties of composite materials. With a higher content of a wood filler, the cost can be reduced but the quality of products made of this material may significantly deteriorate. However, depending on the application and the life cycle of this product, it is possible to develop a formulation that includes a high concentration of filler.

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.

Impact of Superplasticizing Agents on Physical and Mechanical Properties of Cellular Concrete

2019 ◽  
Vol 974 ◽  
pp. 181-186
Author(s):  
V.A. Perfilov ◽  
V.V. Gabova ◽  
Inessa A. Tomareva
Keyword(s):  
Mechanical Properties ◽  
Pore Structure ◽  
Pore Space ◽  
Experimental Studies ◽  
Basalt Fiber ◽  
Physical And Mechanical Properties ◽  
Foam Concrete ◽  
Cellular Concrete

The effect of superplasticizing, foam agents, various fiber aggregates on the physical and mechanical properties of cellular concrete has been studied. The article covers the results of experimental studies conducted to determine the effect of foam agents PO-6 and PB-2000, as well as polymeric and basalt fiber on the pore structure of foam concrete. The dependence between the change in density and strength of cellular concrete and the structure of its pore space has been determined.

scholarly journals RESULTS OF MULTIVARIATE EXPERIMENT TO DETERMINE DEPENDENCE OF THE MAXIMUM PRESSURE OF TRACTOR WHEELS ON THE SOIL FROM TRACTOR’S PARAMETERS AND PHYSICAL AND MECHANICAL PROPERTIES OF SOIL. STATISTICAL ANALYSIS

2017 ◽  
pp. 94-98
Author(s):  
Хафизов ◽  
Kamil Khafizov ◽  
Хафизов ◽  
Ramil Khafizov
Keyword(s):  
Mechanical Properties ◽  
Similarity Theory ◽  
Experimental Studies ◽  
Similarity Criterion ◽  
Statistical Processing ◽  
Physical And Mechanical Properties ◽  
Multiple Correlation Coefficient ◽  
Similarity Criteria ◽  
Maximum Pressure ◽  
Regression Equations

A similarity criteria were reveled to determine the dependence of maximum pressure of the tractor wheel on the soil on the basis of the use of similarity theory. Each similarity criterion includes several parameters, characterizing the tractor, its propeller and physical and mechanical properties of the soil. The similarity criteria is taken as factors in the multivariate experiment. Multifactorial experimental studies were planned and carried out. We used Statistics Toolbox subsystem of Matlab computer mathematics system for processing the results of experiments. As a result of statistical processing of the experimental data by the equation we obtained a dependence of maximum pressure of the tractor wheel on the soil from tractor parameters, and physical and mechanical properties of the soil. Statistical data on the equations, such as - multiple correlation coefficient, Fisher’s criterion, Student’s criterion, indicate the significance of equations of the experiments variants, as well as the significance of the coefficients of the regression equations.

scholarly journals Experimental research of dependence between informative parameters NDT techniques and steel physical and mechanical properties

2018 ◽  
pp. 44-48
Author(s):  
N. I. Chaban
Keyword(s):  
Mechanical Properties ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Ultrasonic Field ◽  
Failure Detectors ◽  
Metal Structures ◽  
New Methods ◽  
Informative Parameters ◽  
Non Destructive

Research of new methods and technologies of non-destructive control of change of long-term metal structures is an actual task of the present. In this article the methodology and results of experimental studies, the main aim of which is to determine the correlation between the intensity of structural noise in the material determined by failure detectors based on ultrasonic field-induced phase grating and the physical and mechanical properties of steels are presented.

scholarly journals ЕКСПЛУАТАЦІЙНІ ВЛАСТИВОСТІ ГОТЕЛЬНИХ МАХРОВИХ РУШНИКІВ

2021 ◽  
pp. 43-51
Author(s):  
А. С. Паршин ◽  
С. І. Арабулі ◽  
А. Т. Арабулі
Keyword(s):  
Mechanical Properties ◽  
Materials Science ◽  
Experimental Studies ◽  
Statistical Processing ◽  
Physical And Mechanical Properties ◽  
Basic Principles ◽  
Textile Materials ◽  
Textile Fabrics ◽  
High Level ◽  
Experimental Researches

Assessment of the providing level of hotel facilities by quality terry towels based on a comprehensive study of the operational properties of terry textile fabrics. Methodology. Theoretical and experimental researches are based on the basic principles of textile materials science. During experimental studies, modern methods were used to determine the physical and mechanical properties of textile materials, as well as methods of mathematical planning and statistical processing of the experimental results. Results. The state and norms for the provision of hotel facilities in Ukraine with terry towels are given. The assortment of hotel terry towels has been analyzed. The main factors of the formation of a modern assortment of textile materials for hotel terry towels are considered. The focus is on the classic range of double nap terry fabrics for hotel towels. The analyses of the physical and mechanical properties of modern fabrics for hotel towels are present. Indicators characterizing the interaction of textile with liquid moisture have been experimentally determined. The paper presents the results of determining the wear resistance of fabrics after 1, 5 and 10 cycles "wash-ironing". Scientifi c novelty. The data of the physical and mechanical properties of the classic assortment of textile materials for hotel terry towels are systematized. It has been experimentally proven that the assortment of cotton terry textile materials, which is currently available on the Ukrainian market and is used for the manufacture of hotel terry towels, provides a high level of comfort and durability of towels. Practical value. The modern assortment of textile materials for hotel terry towels is analyzed, taking into account the peculiarities of the operational situation of consumption.

ENSURING TIGHTNESS IN PRESSURE COUPLING PARTS

2021 ◽  
Vol 2021 (11) ◽  
pp. 51-59
Author(s):  
Nikolay Kurnosov ◽  
Aleksandr Tarnopol'skiy ◽  
Yuliya Nakashidze
Keyword(s):  
Mechanical Properties ◽  
Cyclic Load ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Accelerated Testing ◽  
Dynamic Loads ◽  
Surface Material ◽  
Urgent Problem ◽  
Mating Surface ◽  
The Impact

Work objective is to solve the urgent problem of increasing the tightness and reliability of pressure couplings during their operation under dynamic loads. Theoretical and experimental studies assessing the impact on the tightness due to roughness nature of mating surfaces and three types of coatings: soft, double-layer and hard have been undertaken. The joints were tested under the influence of axial cyclic load and torque on a bench for accelerated testing. It is established that tightness of pressure couplings during operation under dynamic loads significantly depends on the parameters of microgeometry and physical and mechanical properties of the mating surface material that determine their actual contact area. Recommendations for preparing the surfaces of parts before pressure coupling assembling have been developed. It is proved that the use of regular microrelief and soft galvanic coatings of mating surfaces have a significant effect on the tightness of pressure couplings.

On the Methods for Assessing the Resistance of Steels to Brittle Fracture

2021 ◽  
pp. 59-64
Author(s):  
A.P. Korchagin ◽  
◽  
K.A. Kuznetsov ◽  
A.M. Kuznetsov ◽  
S.I. Kirillov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Brittle Fracture ◽  
Impact Strength ◽  
Low Temperatures ◽  
Physical And Mechanical Properties ◽  
Correct Choice ◽  
Temperature Dependences ◽  
And Control ◽  
The Impact ◽  
Resistance To Brittle Fracture

The problem of assessing steels durability, their resistance to brittle fracture in the structures used in various branches of industry, remains relevant at the development of the new equipment and control of the old equipment. Standard strength calculations do not give a complete picture of the ability of steels due to their physical and mechanical properties to resist the formation and further development of defects and cracks under the action of actual stresses. The correct choice of a structural material for technical devices operating at low temperatures, knowledge of its characteristics of resistance to brittle fracture, understanding of brittle fracture mechanism at low temperatures and research in this area are of great importance. Since 1980s, JSC IrkutskNIIkhimmash systematically conducts the research works related to impact strength characteristics. These works are carried out in connection with the need for assessing the resistance to brittle fracture of metal of the equipment for storing oil products, vessels and pipelines, drill pipes and tubing, etc. As a result of many years of research, the authors accumulated significant experimental material in the form of temperature dependences of impact strength - both for the material of various types of blanks (sheets, pipes, forgings) in the state of delivery, and for the metal of technical devices elements after their operation of various duration. The main objective of the article is to assist specialists in establishing the correct choice of steel for the new or old structures in terms of their resistance to brittle fracture without conducting special studies. Specialists can select the closest steel analogue (on chemical composition, mechanical properties, and the type of product without making cuts from the structure or blanks for additional research), and set the numerical value of the impact strength, critical temperature of brittleness and the stress intensity factor for any temperature in the range from –40 to 20° С in order to use them in further calculations.

Measurement of Physical and Mechanical Properties of High-Speed Heated Casting Cores

2015 ◽  
Vol 729 ◽  
pp. 114-118
Author(s):  
Ivan Nikolaevich Erdakov ◽  
Viktor Vladimirovich Novokreshchenov ◽  
Vladimir Michaylovich Tkachev ◽  
Ranil Danillovich Gabbasov
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
High Speed ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Deformation Model

The paper presents the results of experimental studies of physical and mechanical properties of casting cores (-set process using Carbectis binder) high-speed heated with subsequent destruction. Based on experimental data, such parameters of deformation model of a core are obtained which permit to calculate the values of hindered shrinkage of AK7Ch alloy with the accuracy of 1.5 %.

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