scholarly journals Relationship between the indices of physical and mechanical properties of coal and rock, gas saturation and tectonic dislocation of Donbas

2019 ◽  
Vol 109 ◽  
pp. 00076 ◽  
Author(s):  
Dmytro Pymonenko
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Regional Level ◽  
Gas Content ◽  
Statistical Relationship ◽  
Regional Patterns ◽  
Gas Saturation ◽  
Correlation And Regression Analysis ◽  
The Relationship ◽  
Tectonic Dislocation

The article deals with the distribution of disturbances in the coal-bearing deposits of Donbas and establishment of the relationship between the indices of physical and mechanical properties of coal and rock, gas saturation and tectonic dislocation. To solve the problems, statistical methods were used (correlation and regression analysis). The schemes of deformations of Donbas have been built, both in individual indices and in indices of complex dislocation, which reflect the regional patterns of distribution of the deformations of various types throughout the Donetsk basin. Close statistical relationship has been established between indices of tectonic dislocation, gas saturation, physical and mechanical properties of coal and rocks, which allows the use of the indices of tectonic dislocation to predict gas content at the regional level.

scholarly journals Recycled Mortars with Ceramic Aggregates. Pore Network Transmutation and Its Relationship with Physical and Mechanical Properties

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1543
Author(s):  
Francisca Guadalupe Cabrera-Covarrubias ◽  
José Manuel Gómez-Soberón ◽  
Carlos Antonio Rosas-Casarez ◽  
Jorge Luis Almaral-Sánchez ◽  
Jesús Manuel Bernal-Camacho
Keyword(s):  
Mechanical Properties ◽  
Image Analysis ◽  
Open Porosity ◽  
Gas Adsorption ◽  
Physical And Mechanical Properties ◽  
Recycled Aggregate ◽  
Bet Surface Area ◽  
Sem Image ◽  
The Relationship ◽  
Sem Image Analysis

The porosity of mortars with recycled ceramic aggregates (10, 20, 30, 50, and 100% as a replacement of natural aggregate) was evaluated and analyzed using three different techniques. The results of gas adsorption (N2), Scanning Electron Microscopy (SEM) image analysis and open porosity allowed establishing the relationship between the recycled aggregate content and the porosity of these mortars, as well as the relationship between porosity and the physical and mechanical properties of the mortars: absorption, density, compressive strength, modulus of elasticity, and drying shrinkage. Using the R2 coefficient and the equation typology as criteria, additional data such as Brunauer, Emmett, and Teller (BET) surface area (N2 adsorption) established significant correlations with the mentioned properties; with SEM image analysis, no explanatory relationships could be established; and with open porosity, revealing relationships were established (R2 > 0.9). With the three techniques, it was confirmed that the increase in porosity is related to the increase in the amount of ceramic aggregate; in particular with gas adsorption (N2) and open porosity. It was concluded that the open porosity technique can explain the behavior of these recycled mortars with more reliable data, in a simple and direct way, linked to its establishment with a more representative sample of the mortar matrix.

Fabrication of Porous Polyethylene by Two-Stepped Heat Treatment and Powder Printing Technique

2010 ◽  
Vol 93-94 ◽  
pp. 165-168 ◽  
Author(s):  
Jintamai Suwanprateeb ◽  
Kitiya Wasoontararat ◽  
Waraporn Suvannapruk
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Density Polyethylene ◽  
Physical And Mechanical Properties ◽  
High Density ◽  
Processing Conditions ◽  
Structure And Properties ◽  
Porous Polyethylene ◽  
Printing Technique ◽  
The Relationship

In this study, a combination of powder printing technique and two-stepped heat treatment was utilized as a mean to prepare porous high density polyethylene structure. Physical and mechanical properties of the resulting structure were then characterized by porosity measurement and monotonic tensile test. It was found that the relationship between structure and properties was strongly influenced by processing conditions including compositions, treatment times and treatment temperatures. This process could increase the properties of porous high density polyethylene significantly over the single-stepped heat treatment without destroying porous structure. Porous high density polyethylene bodies having a porosity ranging from 46-58 percents with tensile strength up to approximately 4 MPa could be successfully prepared in this study.

scholarly journals Synthesis and Properties of Electroconductive Polymeric Composite Material Based on Polypyrrole

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
N. S. Ilicheva ◽  
N. K. Kitaeva ◽  
V. R. Duflot ◽  
V. I. Kabanova
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Mechanical Strength ◽  
Process Parameters ◽  
Physical And Mechanical Properties ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Elastic Composite ◽  
The Relationship

A technique is proposed for obtaining electroconductive, mechanically strong, and elastic composite material based on polypyrrole and hydrophilized polyethylene. The relationship is established between the process parameters and properties of the composite material such as electroconductivity and mechanical strength. Several methods are considered in the view of increasing electroconductivity of the material. Physical and mechanical properties of the composite material are investigated.

scholarly journals Statistical Relationship between the Parameters of Some Indexed Journals by Fuzzy Linear Regression

2019 ◽  
Vol 8 (3) ◽  
pp. 4959-4964
Keyword(s):  
Linear Regression ◽  
Pearson Correlation ◽  
Decision Time ◽  
Acceptance Rate ◽  
Statistical Relationship ◽  
Fuzzy Linear Regression ◽  
Correlation And Regression Analysis ◽  
Two Measures ◽  
The Relationship ◽  
Moderate Positive Correlation

In this paper, we propose a statistical relationship between acceptance rate & first decision time of some indexed journals by applying fuzzy linear regression (FLR). We collect the data from two web sources: Elsevier journal finder, and Springer journal suggester. In this problem, we concentrate on the data of the acceptance rate and first decision time. To examine the relationship between these measures, we apply a statistical approach, which is based on correlation and regression analysis. We determine the relative error (RE) of the data collected. We plot the scatter diagram between the two measures. Pearson correlation coefficient (CC) value is also calculated. All this analysis reports that there is a moderate positive correlation between acceptance rate & first decision time.

THE RELATIONSHIP OF ABRASIVE WEAR OF URETHAN-CONTAINING ELASTOMERS WITH THEIR PHYSICAL AND MECHANICAL PROPERTIES

2021 ◽  
pp. 25-28
Author(s):  
V. Y. Senichev ◽  
◽  
E. V. Pogorel’tsev ◽  
A. I. Slobodinyuk ◽  
M. A. Makarova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Abrasive Wear ◽  
Elastic Properties ◽  
Physical And Mechanical Properties ◽  
Physicomechanical Properties ◽  
Relationship Of ◽  
The Relationship

The relationship between abrasive wear and the physicomechanical properties of casting polyurethane and polyurethane urea elastomers based on P-6BA polyester in the widest range of their elastic properties was investigated.

Wood grain angles variations in Eucalyptus and their relationships to physical-mechanical properties

Holzforschung ◽  
2020 ◽  
Vol 74 (12) ◽  
pp. 1089-1097
Author(s):  
José Clailson Franco Coelho ◽  
Graziela Baptista Vidaurre ◽  
João Gabriel Missia da Silva ◽  
Maria Naruna Felix de Almeida ◽  
Ramon Ferreira Oliveira ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Eucalyptus Grandis ◽  
Basic Density ◽  
Physical And Mechanical Properties ◽  
Wood Properties ◽  
Volumetric Shrinkage ◽  
Angular Deviation ◽  
Grain Angle ◽  
Strength And Stiffness ◽  
The Relationship

AbstractThe relationship between grain angle and wood properties has not been focus of researches in wood industry. The aim of this study was to establish grain angle variations in commercial Eucalyptus logs and their effects on physical-mechanical wood properties. Wood maximum angular deviation (MAD) was correlated with density, volumetric shrinkage, compressive strength parallel to grain, flexural strength and stiffness as determined by bending and acoustic methods in wood of seven Eucalyptus grandis × Eucalyptus urophylla clones at 13 years old. The relationship between MAD at pith-bark and base-top positions and its effect on the physical and mechanical properties were evaluated. Amplitude of MAD values was small for the seven clones, and the mean was 6.2°. The grain deviation decreased by only 8% in base-top direction, and the correlations among MAD and three logs heights were small and negative (r = −0.13). MAD values presented an increasing trend of 33% in pith-bark direction, with a small positive correlation (r = 0.42). Basic density (BD) presented a significant correlation with the MAD (r = 26). There was no significant correlation between the MAD and volumetric shrinkage, mechanical properties and modulus of elasticity dynamic (determined by stress wave timer, ultrasound or transverse vibration).

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.

scholarly journals Correlation between physical and mechanical properties of mudrock

2000 ◽  
Vol 22 ◽  
Author(s):  
G. R. Lashkaripour
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Regression Analysis ◽  
Elastic Wave ◽  
Physical And Mechanical Properties ◽  
Elastic Wave Velocity ◽  
Point Load ◽  
Regression Equations ◽  
Statistical Relationship ◽  
Different Types

The paper describes the statistical relationship between physical and mechanical properties of mudrock. It focuses particularly on the correlation between index parameters that are relatively easy to measure and mechanical properties that are difficult to determine. Data for regression analysis were extracted from available published information. Moreover, many tests were carried out on different types of mudrock from various sites. Reasonably good correlation is found between some index parameters and mechanical properties, and various regression equations are proposed for predicting mechanical properties for available data. There is a good correlation between the point load, water content, porosity, and modulus of elasticity with the uniaxial compressive strength, whereas the correlation between the density, elastic wave velocity, and Poisson's ratio with the compressive strength is poor. Theses correlations may aid engineers to make preliminary estimation of the mechanical properties of mudrock when samples of adequate size for testing are generally not available. Furthermore, the selective use of proposed relationships may even reduce the testing requirements of specific projects.

scholarly journals Analysis of Some Technological and Physical Characters of Mandarin (Citrus reticulata) Fruit in Iran

ISRN Agronomy ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Abdollah Khadivi-Khub
Keyword(s):  
Mechanical Properties ◽  
Specific Gravity ◽  
Linear Relation ◽  
Physical And Mechanical Properties ◽  
Coefficient Of Determination ◽  
Citrus Reticulata ◽  
High Coefficient ◽  
Date Fruit ◽  
The Relationship

Knowledge of the physical properties of date fruit is necessary for the design of postharvesting equipment such as cleaning, sorting, grading, kernel removing, and packing. Also, the physical and mechanical properties are incorporated in the development of the grading machine as a case study. In this study, some physical and mechanical properties of three mandarin cultivars, as promising fruits, were analyzed to help the design of handling machines. According to results, the greatest dimensional characteristics were found for Page cultivar, whereas Onsho cultivar showed the lowest sphericity value (93%), and the highest sphericity was observed in Clementine cultivar (97%). The specific gravity of Page cultivar was 0/97, and this cultivar had the biggest fruit. Thus, it may be used for export. The volume measured was 1% higher than the calculated assumed shape of the spheroid . The relationship between diameters and mass was linear, and the correlation was high for all studied cultivars and mixed cultivar (combined all data). There was a linear relation between mass and volume of the mixed cultivar of mandarin with a high coefficient of determination.

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