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Online since: July 2011
Authors: Ao Shuang Tian
The effects on properties of concrete for different high temperature and heated time are compared.
Therefore, a lot of researches have been done in order to analyze the mechanical properties of concrete after undergoing high temperature [1-4].
Besides, all kinds of experiment research are committed to how to improve the properties of concrete after high temperature [5-7].
These results may be caused by the following factors: (1) Because of the action of the high temperature, the moisture inside the specimens would be evaporated, and the micro cracks and holes would be left in the specimens.
So, the inconsistent interaction affected the deformation property.
Therefore, a lot of researches have been done in order to analyze the mechanical properties of concrete after undergoing high temperature [1-4].
Besides, all kinds of experiment research are committed to how to improve the properties of concrete after high temperature [5-7].
These results may be caused by the following factors: (1) Because of the action of the high temperature, the moisture inside the specimens would be evaporated, and the micro cracks and holes would be left in the specimens.
So, the inconsistent interaction affected the deformation property.
Online since: August 2013
Authors: Su Zhao, Ya Qing Li, Qian Wang
Influences of doped phosphors on concrete mechanical properties were studied.
The influences of doped phosphor on concrete mechanical properties.
If increases in the thickness of the concrete coating, then the light refraction, reflection and other factors will become larger, phosphor release light will be much weaker, which greatly shorten the luminescence time.
Dope CaO (xDy3+, yNa+) properties into the raw concrete materials to obtain the luminous concrete.
Influences of doped phosphors on concrete mechanical properties were studied.
The influences of doped phosphor on concrete mechanical properties.
If increases in the thickness of the concrete coating, then the light refraction, reflection and other factors will become larger, phosphor release light will be much weaker, which greatly shorten the luminescence time.
Dope CaO (xDy3+, yNa+) properties into the raw concrete materials to obtain the luminous concrete.
Influences of doped phosphors on concrete mechanical properties were studied.
Online since: February 2008
Authors: Jia Lin Sun, Jin Feng Wang, Ya Chun Gao, Xian Feng Yang, Zhi Peng Xie
The
influencing factors on suspension flowability as the content of dispersant, pH value, solid loading, and
milling time were studied in detail.
The rheological properties and gelcasting of ultrafine ZrO2 suspensions were investigated in this work Experimental Procedures Materials.
Rheological properties of slurries were measured with an advanced MCR300 rheometer.
The bending strength of green bodies was determined by a material mechanical testing machine.
At higher shear rates, the viscous forces affect the suspension structure and shear thinning occurred [11].
The rheological properties and gelcasting of ultrafine ZrO2 suspensions were investigated in this work Experimental Procedures Materials.
Rheological properties of slurries were measured with an advanced MCR300 rheometer.
The bending strength of green bodies was determined by a material mechanical testing machine.
At higher shear rates, the viscous forces affect the suspension structure and shear thinning occurred [11].
Online since: October 2015
Authors: Irina Kurzina, Natalja Popova, Mark P. Kalashnikov, Elena L. Nikonenko, Alisa V. Nikonenko
The surface modification is mostly aimed at the improvement of mechanical-and-physical and service properties of materials.
Alloy hardening vs ion implantation Such properties as yield stress and mechanical hardening of metallic materials are typical quantitative indicators of their mechanical strength.
These factors have different behavior for the implanted states of the type VT1-0 alloys.
Eroshenko et al., Evolution of structure and mechanical properties of ultrafine grained titanium, Materials Science (Materialovedenie – in Russian), 5 (2010) 48-55
Mac Lin, Mechanical properties of metals, Metallurgy, Moscow (Moskva – in Russian), 1965
Alloy hardening vs ion implantation Such properties as yield stress and mechanical hardening of metallic materials are typical quantitative indicators of their mechanical strength.
These factors have different behavior for the implanted states of the type VT1-0 alloys.
Eroshenko et al., Evolution of structure and mechanical properties of ultrafine grained titanium, Materials Science (Materialovedenie – in Russian), 5 (2010) 48-55
Mac Lin, Mechanical properties of metals, Metallurgy, Moscow (Moskva – in Russian), 1965
Online since: April 2004
Authors: Hong Gun Kim
Several
properties of these materials should be compared and the material with best properties
required for the usage should be selected.
Generally, mechanical properties of a composite material show anisotropic characteristics.
The magnitudes of properties also show different values from those of reinforcing fiber or resin, and are affected by various factors such as fiber volume fraction, type and orientation of reinforcement fibers, etc.
Thus in order to properly perform structural analyses of a composite material, careful considerations of mechanical properties are essential.
This study utilizes mechanical property data provided by Dupont.
Generally, mechanical properties of a composite material show anisotropic characteristics.
The magnitudes of properties also show different values from those of reinforcing fiber or resin, and are affected by various factors such as fiber volume fraction, type and orientation of reinforcement fibers, etc.
Thus in order to properly perform structural analyses of a composite material, careful considerations of mechanical properties are essential.
This study utilizes mechanical property data provided by Dupont.
Online since: September 2017
Authors: Pavel Svoboda, Pavel N. Ivanov, Alexander N. Kravcov, Dmitry V. Morozov, Vaclav Pospíchal
The analysis of factors influencing the tension of rocks around shafts shows that, with respect to designing of shelters with specified parameters of particle velocity, the most effective method of assessment of shaft stability seems to be calculation of change in depth of the limit position of rock outcrops in dependence on strength characteristics of the rocks.
A comprehensive calculation of change in the values of is dependence on the rock strength is made with respect to the relationship between mechanical and acoustic properties and specific properties of the geological structure of the rock layer.
After summarising the results of experimental studies of acoustic and mechanical properties of rocks in samples and implementation of the obtained data in shaft conditions, we obtain the dependence between the breaking strength under pressure and the acoustic resistance of rocks in the massif, which can be used in comprehensive calculations of limit equilibrium.
All you really need is the strength properties of rocks.
The calculated strength properties and also the acoustic properties of rock can be determined on the basis of the strength values and the level of disruption of the rock massif, where these values may be missing for the specific conditions of mine works and also for individual deposits (basins) in a number of cases.
A comprehensive calculation of change in the values of is dependence on the rock strength is made with respect to the relationship between mechanical and acoustic properties and specific properties of the geological structure of the rock layer.
After summarising the results of experimental studies of acoustic and mechanical properties of rocks in samples and implementation of the obtained data in shaft conditions, we obtain the dependence between the breaking strength under pressure and the acoustic resistance of rocks in the massif, which can be used in comprehensive calculations of limit equilibrium.
All you really need is the strength properties of rocks.
The calculated strength properties and also the acoustic properties of rock can be determined on the basis of the strength values and the level of disruption of the rock massif, where these values may be missing for the specific conditions of mine works and also for individual deposits (basins) in a number of cases.
Online since: September 2013
Authors: Hendra Suherman, Abu Bakar Sulong, Jaafar Sahari, Mohd Yusuf Zakaria
One of the properties is the electrical conductivity.
Selection of control factors.
Control factors are the design parameter that affect the outcome of the study.
Effect of control factors on the S/N ratio Analysis of variance (ANOVA).
Therefore analysis of variance is taken place in order to investigate the effect of the individual factor that influenced the electrical properties of the composite.
Selection of control factors.
Control factors are the design parameter that affect the outcome of the study.
Effect of control factors on the S/N ratio Analysis of variance (ANOVA).
Therefore analysis of variance is taken place in order to investigate the effect of the individual factor that influenced the electrical properties of the composite.
Online since: July 2021
Authors: Oksana Korobko, Valeriy M. Vyrovoy, Yuryi Zakorchemny, Nadiia Antoniuk
Thus, the initial structure under the influence of the accepted structure-forming factors hereditarily determines the structural changes and the manifestation of the physical and technical properties of concrete and expanded clay concrete during long-term hardening.
Factors of structure safe operation.
Therefore, it is important to determine the dominant criteria affecting safety, the maximum limits of their permissible changes and methods for their determination and estimation.
In numerous works, methods have been proposed that make it possible to estimate the mechanical properties of concrete, its protective properties in relation to reinforcement, the condition of the reinforcement and, thus, the very condition of the building structure.
Integrated safety presupposes self-preservation of the main parameters of properties under the influence of external and internal factors.
Factors of structure safe operation.
Therefore, it is important to determine the dominant criteria affecting safety, the maximum limits of their permissible changes and methods for their determination and estimation.
In numerous works, methods have been proposed that make it possible to estimate the mechanical properties of concrete, its protective properties in relation to reinforcement, the condition of the reinforcement and, thus, the very condition of the building structure.
Integrated safety presupposes self-preservation of the main parameters of properties under the influence of external and internal factors.
Online since: January 2012
Authors: Yong Hui Zhou, Jun Zhao, Z.Q. Pei, Xiao Bing Cui
Pei1, d
1 Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061, P.
The material properties of them are listed in Table 1.
Table 1 Properties of the tool materials Tools Flexural strength sf [Mpa] Fracture toughness KIc [MPa×m1/2] Vicker’s hardness HV [Gpa] Young’s modulus E [Gpa] SG-4 870 5.15 21.7 436 AWT-10 930 7.55 23.5 469 Turning Experiments.
The cutting parameters of orthogonal and single factor tests are shown in Table 2.
Table 2 Cutting parameters of orthogonal and single factor intermittent turning tests Exp. no.
The material properties of them are listed in Table 1.
Table 1 Properties of the tool materials Tools Flexural strength sf [Mpa] Fracture toughness KIc [MPa×m1/2] Vicker’s hardness HV [Gpa] Young’s modulus E [Gpa] SG-4 870 5.15 21.7 436 AWT-10 930 7.55 23.5 469 Turning Experiments.
The cutting parameters of orthogonal and single factor tests are shown in Table 2.
Table 2 Cutting parameters of orthogonal and single factor intermittent turning tests Exp. no.
Online since: August 2014
Authors: Dyi Cheng Chen, Wen Hsuan Ku
This not only changes the appearance but also changes the internal organization of materials that improve mechanical properties [1].
Zherebtsov et al [2] studied the two-phase Ti-6Al-4V alloy ultrafine grain structure, produce ultrafine-grained microstructure of the alloy through multi-axis forging, including deformation temperature depends on the final structure of the α and β particles, and ultra-mechanical properties of fine grain material for comparison.
In particular, there is a significant impact from the metal flow and heat transfer coefficients in the calibration curve, thereby affecting the measurement of interfacial friction coefficient.
The design factors in the bicycle front fork (Table 1) include the following: Factor A, die temperature; Factor B, billet temperature; Factor C, forging speed; Factor D, friction factors; and Factor E, die angle.
The confidence and significance are highly critical for control factors.
Zherebtsov et al [2] studied the two-phase Ti-6Al-4V alloy ultrafine grain structure, produce ultrafine-grained microstructure of the alloy through multi-axis forging, including deformation temperature depends on the final structure of the α and β particles, and ultra-mechanical properties of fine grain material for comparison.
In particular, there is a significant impact from the metal flow and heat transfer coefficients in the calibration curve, thereby affecting the measurement of interfacial friction coefficient.
The design factors in the bicycle front fork (Table 1) include the following: Factor A, die temperature; Factor B, billet temperature; Factor C, forging speed; Factor D, friction factors; and Factor E, die angle.
The confidence and significance are highly critical for control factors.