scholarly journals Model of the interaction of elements of track supporting surface of harvester with soil

10.12737/8472 ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 191-200 ◽  
Author(s):  
Клубничкин ◽  
Evgeniy Klubnichkin ◽  
Клубничкин ◽  
Vladislav Klubnichkin ◽  
Дручинин ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Analytical Description ◽  
Supporting Surface

Analytical description of the interaction between the tracks with soil is quite difficult, although to date the physical and mechanical properties of soils are fairly well understood. However, the application of the laws of soil mechanics to describe the interaction of track with soil is not acceptable because of loading dynamism of soil with elements of track bearing surfaces. Therefore, to describe the process of interaction of track with soil the experimental data are used, which revealed some general patterns.

Basic set of experiments for determination of mechanical properties of sand

2014 ◽  
Vol 62 (1) ◽  
pp. 129-137
Author(s):  
A. Sawicki ◽  
J. Mierczyński
Keyword(s):  
Mechanical Properties ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Local Strain ◽  
Initial State ◽  
Laboratory Equipment ◽  
Additional Information ◽  
Basic Set ◽  
Initial Anisotropy

Abstract A basic set of experiments for the determination of mechanical properties of sands is described. This includes the determination of basic physical and mechanical properties, as conventionally applied in soil mechanics, as well as some additional experiments, which provide further information on mechanical properties of granular soils. These additional experiments allow for determination of steady state and instability lines, stress-strain relations for isotropic loading and pure shearing, and simple cyclic shearing tests. Unconventional oedometric experiments are also presented. Necessary laboratory equipment is described, which includes a triaxial apparatus equipped with local strain gauges, an oedometer capable of measuring lateral stresses and a simple cyclic shearing apparatus. The above experiments provide additional information on soil’s properties, which is useful in studying the following phenomena: pre-failure deformations of sand including cyclic loading compaction, pore-pressure generation and liquefaction, both static and caused by cyclic loadings, the effect of sand initial anisotropy and various instabilities. An important feature of the experiments described is that they make it possible to determine the initial state of sand, defined as either contractive or dilative. Experimental results for the “Gdynia” model sand are shown.

The Influence on the Physical and Mechanical Properties of the Tread by Preheating of Raw Rubber

2012 ◽  
Vol 501 ◽  
pp. 114-116
Author(s):  
Chuang Sheng Wang ◽  
Feng Bao Bai
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Water Temperature ◽  
Fill Factor ◽  
Cooling Water ◽  
Physical And Mechanical Properties ◽  
Rotor Speed ◽  
Cooling Water Temperature

This paper using synchronous rotor mixer, had researched the influence of preheating of raw rubber on the physical and mechanical properties of the tread under the same fill factor, rotor speed, cooling water temperature, and the pressure on top of bolt. According to processing and analysis of the experimental data, we can conclude that: As the temperature of raw rubber increased, the physical and mechanical properties of the tread had changed.

scholarly journals Study of the expanded clay sand uses in surface and underground mine construction

2021 ◽  
Vol 315 ◽  
pp. 01008
Author(s):  
Natalya Gilyazidinova ◽  
Evgeniy Shabanov ◽  
Tatyana Santalova
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Material Properties ◽  
Construction Projects ◽  
Physical And Mechanical Properties ◽  
Underground Mine

The possibility of using expanded clay sand in surface and underground mine construction is considered in the article. As a result of the research, the material properties were studied, its uses were determined. The research has experimentally proven that expanded clay sand can be used as a base for concretes and mortars, which are suitable for mine construction by their properties. In the course of the research, samples of various compositions were made; the structure of the material is shown. Samples were tested to determine several physical and mechanical properties. Based on the experimental data, it was concluded that expanded clay sand can be used for mine construction projects, providing strength and heat performance of structures.

A Review of Rubber Oxidation

2005 ◽  
Vol 78 (2) ◽  
pp. 355-390 ◽  
Author(s):  
Gui-Yang Li ◽  
J. L. Koenig
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Spatial Distribution ◽  
Oxidative Degradation ◽  
Physical And Mechanical Properties ◽  
Oxidation Products ◽  
Unique Combination ◽  
The Past ◽  
Diffusion Limited ◽  
Rubber Compounds

Abstract The aging of rubber caused by oxidative degradation leads to the deterioration in the physical and mechanical properties of vulcanized rubbers. In an effort to improve the oxidative stability of rubbers and elastomers, considerable amount of work has been carried out over the past 50 years (especially in the most recent 5 years) in order to understand degradation modes and effects in rubber due to the action of oxygen and ozone in the air. Different mechanisms have been proposed to interpret the experimental data relative to the oxidation of rubber. The diffusion limited theory has been widely used in the literature and verified by many experiments. Various instrumental techniques have been utilized to characterize the oxidation and degradation and their mechanisms in rubber compounds. Recently, FTIR imaging has demonstrated a unique combination of spectral and spatial resolution which allows not only the identification of the oxidation products but also their spatial distribution from the oxygen penetrating surfaces. This critical review will cover the major developments in our understanding of the oxidation of rubbers.

Distribution and verification of Quaternary deposits in the Cairo Area

1991 ◽  
Vol 7 (1) ◽  
pp. 533-540
Author(s):  
M. A. El-Sohby ◽  
S. O. Mazen
Keyword(s):  
Mechanical Properties ◽  
Historical Development ◽  
Soil Mechanics ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Complete Agreement ◽  
Test Results ◽  
River Nile ◽  
Quaternary Deposits ◽  
Combined Impact

AbstractIn previous research studies, the combined impact of the morphology of the surface, the River Nile and its changes, and the geological, environmental and historical development in the Cairo area, were considered. As a result, characteristic regions of soil formations were identified and classified by their origin, and their distribution produced on maps.In present research work, the authors have examined a large number of borehole records to verify the previous Classification. These boring records were simplified and subsoil section drawn at different locations.It was found that the simplified borehole records and subsoil sections are in complete agreement with the distribution of soils based on their origin. Thus, typical profiles representing classified types in Cairo area could be drawn and related to the stratigraphical sequence.In order to fully appreciate the nature of alluvial and deltaic deposits in the Cairo area, important physical and mechanical properties of each sublayer of the defined soil formations were determined. This was done on the basis of soil mechanics test results of natural samples.

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 %.

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 MEASURING THE SOIL COMPACTION ZONE AND PRESSURE OF DEFORMED SOIL ON UNDERGROUND OBJECTS WITH AN ASYMMETRIC CYLINDRICAL TIP

2021 ◽  
pp. 93-100
Author(s):  
Vladimir Suponyev ◽  
Nataliia Fidrovska ◽  
Sergii Balesnyi ◽  
Vitaliy Ragulin ◽  
Svyatoslav Kravets
Keyword(s):  
Mechanical Properties ◽  
Power Plants ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Maximum Size ◽  
Soil Mass ◽  
Deep Soil ◽  
Frontal Surface ◽  
Before And After ◽  
Deformed State

At trenchless laying of engineering communications in soil the method of static puncture has received wide application at formation of a well. Power plants that implement it have small dimensions, which make them more effective in laying distribution engineering networks in tight urban conditions. Problem. The main disadvantages of the method are the low accuracy of the trajectory and the significant stress in the soil after its compaction, which can lead to the destruction of adjacent underground objects. The first disadvantage is solved by controlling the trajectory of the soil-piercing working body. To solve the second question, it is necessary to know and take into account the specifics of the formation of communication cavities in the soil with an asymmetric tip, which is used for this purpose. Goal. The aim of the work is to establish the regularity of the process of soil puncture by the soil-piercing working body with an asymmetric tip in the form of a cylinder cut at an angle. Methodology. The approaches adopted in the work to solve this goal are based on the theories of deep soil cutting, scientific foundations of soil mechanics, their normative physical and mechanical properties and the law of conservation of soil mass before and after compaction. Results. The calculated dependences for determining the size of the destructive zone from the elastic-plastic deformation of the soil during its puncture by an asymmetric tip with a frontal surface in the form of a beveled cylinder and the pressure of the deformed soil on underground objects are obtained. It is established that the maximum size of the destruction zone and its pressure on underground objects will occur in solid sand. With a tip diameter of 0.3 m, their values can reach 5 m and 0.245 MPa, respectively. Originality. The obtained regularities of soil puncture by a working body with an asymmetric tip in the form of a beveled cylinder made it possible to get an idea of the influence of its deformed state on adjacent communications depending on geometric parameters of the tip and physical and mechanical properties of soils. Practical value. The obtained results can be recommended in the design and determination of technological capabilities of installations for static soil puncture.

scholarly journals Physical And Mechanical Properties Of Sea Ice In Bending

2016 ◽  
Vol 1 (1) ◽  
pp. 78
Author(s):  
S.V. Koshkin ◽  
N.A. Taranukha
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Sea Ice ◽  
Mechanical Characteristics ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Radius Of Curvature ◽  
Neutral Layer ◽  
Strength Limit ◽  
Actual Stress

<p>The work presents the study of changes in the physical and mechanical properties of sea ice in bending. Strength limit σ<sub>в</sub> and deformation module Е<sub>в</sub> of ice under bending are conditional mechanical characteristics of sea ice. These characteristics do not reflect the actual stress state of ice destruction at the time. The ratio of the module to the strength limit Е<sub>в</sub>/σ<sub>в</sub> determines the relative radius of curvature of neutral layer in the place of ice destruction. It is shown that this ratio increases with the increase of ice temperature. Dependencies for determining of Е<sub>в</sub> and σ<sub>в</sub> of sea ice that generalize the experimental data are obtained.</p>

A Review of Rubber Oxidation

2005 ◽  
Vol 78 (3) ◽  
pp. 355-390 ◽  
Author(s):  
Gui-Yang Li ◽  
J. L. Koenig
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Spatial Distribution ◽  
Oxidative Degradation ◽  
Physical And Mechanical Properties ◽  
Oxidation Products ◽  
Unique Combination ◽  
The Past ◽  
Diffusion Limited ◽  
Rubber Compounds

Abstract The aging of rubber caused by oxidative degradation leads to the deterioration in the physical and mechanical properties of vulcanized rubbers. In an effort to improve the oxidative stability of rubbers and elastomers, considerable amount of work has been carried out over the past 50 years (especially in the most recent 5 years) in order to understand degradation modes and effects in rubber due to the action of oxygen and ozone in the air. Different mechanisms have been proposed to interpret the experimental data relative to the oxidation of rubber. The diffusion limited theory has been widely used in the literature and verified by many experiments. Various instrumental techniques have been utilized to characterize the oxidation and degradation and their mechanisms in rubber compounds. Recently, FTIR imaging has demonstrated a unique combination of spectral and spatial resolution which allows not only the identification of the oxidation products but also their spatial distribution from the oxygen penetrating surfaces. This critical review will cover the major developments in our understanding of the oxidation of rubbers.

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