Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2015
Authors: Peter Hope, Janet Hope
As EPD layers become thinner, factors such as substrate surface structure and wettability become more critical.
Principle electrochemical phenomena affecting conductive aqueous systems are these: · Electrolytic gas generation at active electrode surfaces with derived pH gradients
Another significant factor is surface tension.
Critical substrate factors are: • Composition
· Some metals, notably aluminium, magnesium, titanium and ‘stainless steel’ form natural oxide barrier layers on their surfaces in air (passivation) - which can impart semiconductor properties
Principle electrochemical phenomena affecting conductive aqueous systems are these: · Electrolytic gas generation at active electrode surfaces with derived pH gradients
Another significant factor is surface tension.
Critical substrate factors are: • Composition
· Some metals, notably aluminium, magnesium, titanium and ‘stainless steel’ form natural oxide barrier layers on their surfaces in air (passivation) - which can impart semiconductor properties
Online since: June 2014
Authors: Peng Liang Liu
This paper calculated pillar load of the first stage and stowing body load of the second stage with enlarge pressure arch theory, determined stowing and mining interval width in two stages and stowing body strength in the first stage combined with safety factor.
(2) the safety coefficient of pillar In order to guarantee the pillar has enough bearing capacity, it is necessary that the safety factor of pillar is no less than 1.5,and this can meet the requirements of long-term stability of pillar.
Strength of filling body requirements according to the inverse calculation of safety factor formula for filling column,the load on filling according to the theory of expanding pressure arch (according to the mining area filling area and filling body in column total width).in 1~3 replaced coal by filling body, combining with the practice, in proportion to the number of coal pillar mining without filling for 5 mining area (i.e., 59.4 m), filling the column safety factor F = 1.5, filling body strength index was 5.6 MPa.
Compared with the filling body in first phase of, it is always in the triaxial state,is low strength requirements,but the strength of filling body has correlation with compression ratio and bearing capacity, thus affecting rock movement control effect.therefore,determining the strength of filling body in second stage mainly based on meeting the strata movement control requirements.
In order to improve the reliability of simulation results, the use of surface subsidence of the mine 2301 working face of the measured data of simulation parameters optimizing fitting, eventually making the simulation of 2301 face surface subsidence parameters was consistent with the test result, the numerical calculation model of bedrock and the topsoil of block division and the mechanical parameters of rock and joint, according to the physical property of the result of the experiment, filling model in the first stage filling of strength parameters are shown in Tab.3.
(2) the safety coefficient of pillar In order to guarantee the pillar has enough bearing capacity, it is necessary that the safety factor of pillar is no less than 1.5,and this can meet the requirements of long-term stability of pillar.
Strength of filling body requirements according to the inverse calculation of safety factor formula for filling column,the load on filling according to the theory of expanding pressure arch (according to the mining area filling area and filling body in column total width).in 1~3 replaced coal by filling body, combining with the practice, in proportion to the number of coal pillar mining without filling for 5 mining area (i.e., 59.4 m), filling the column safety factor F = 1.5, filling body strength index was 5.6 MPa.
Compared with the filling body in first phase of, it is always in the triaxial state,is low strength requirements,but the strength of filling body has correlation with compression ratio and bearing capacity, thus affecting rock movement control effect.therefore,determining the strength of filling body in second stage mainly based on meeting the strata movement control requirements.
In order to improve the reliability of simulation results, the use of surface subsidence of the mine 2301 working face of the measured data of simulation parameters optimizing fitting, eventually making the simulation of 2301 face surface subsidence parameters was consistent with the test result, the numerical calculation model of bedrock and the topsoil of block division and the mechanical parameters of rock and joint, according to the physical property of the result of the experiment, filling model in the first stage filling of strength parameters are shown in Tab.3.
Grain Size Effect on Optimum Clearance Determination in Blanking Non-Oriented Electrical Steel Sheet
Online since: April 2018
Authors: Shu Hui Li, Zhe Wang, Rong Gao Cui, Xin Ke Wang, Ji He
The results showed that the better blanked edge quality, the less magnetic properties deterioration.
It indicated that punch-die clearance is the most important factor affects the blanked edge quality.
Roth, Influence of the cutting process on the magnetic properties of non-oriented electrical steels.
Lowther, Effect of Shear Cutting on Microstructure and Magnetic Properties of Non-Oriented Electrical Steel.
Riehemann, Influence of Punching and Tool Wear on the Magnetic Properties of Nonoriented Electrical Steel.
It indicated that punch-die clearance is the most important factor affects the blanked edge quality.
Roth, Influence of the cutting process on the magnetic properties of non-oriented electrical steels.
Lowther, Effect of Shear Cutting on Microstructure and Magnetic Properties of Non-Oriented Electrical Steel.
Riehemann, Influence of Punching and Tool Wear on the Magnetic Properties of Nonoriented Electrical Steel.
Online since: September 2014
Authors: Zhu Rong Dong, Cheng Wei Han, Song Hua Hu, Ping He
The braking simulation should include the mechanical braking, electric braking simulation, electric braking/mechanical braking coupling simulation function; meanwhile it allows to make the research on the braking simulation test of electric-braking/mechanical-braking coupling ABS (Anti-lock Braking System).
1.4 Performance test functions of wheel hub motor
The wheel hub motor is the key part of electric vehicle; its performance determines the performance of electric vehicle directly; therefore the test on the mechanical property, efficiency property and other properties of the wheel hub motor is very important.
(2) Mechanical bench: all these factors, for instance the one if the principle of the mechanical part of the test bench is comprehensive and correct, and if the design is rational, will directly affect the comprehensive of test and the accuracy of experimental result.
Mechanical bench system 2.
The mechanical simulation is the flywheel 13.
(3) Electric/mechanical braking coupling simulation test When requiring to increase the braking force, the coupling effect of the electric braking and the mechanical braking is needed.
(2) Mechanical bench: all these factors, for instance the one if the principle of the mechanical part of the test bench is comprehensive and correct, and if the design is rational, will directly affect the comprehensive of test and the accuracy of experimental result.
Mechanical bench system 2.
The mechanical simulation is the flywheel 13.
(3) Electric/mechanical braking coupling simulation test When requiring to increase the braking force, the coupling effect of the electric braking and the mechanical braking is needed.
Online since: August 2012
Authors: Ana Lúcia Diegues Skury, Marcia G. de Azevedo, Sérgio Neves Monteiro, Guerold S. Bobrovinichii, Apostolos Silva
The penetration coefficient varied from 0.89 x 10-7 to 6.41 x 10-7 mm2 indicating that the migration is affected by several factors.
These variations are due to the several distinct processing techniques that are differentiate by specific factors such as the high pressure device (HPD), the diamond particle size, type of binder, heating system, among others [4,5].
It was also found that the factors with higher importance determining the impregnation kinetic were the pressure difference, ∆p, the penetration coefficient Kp and the activation energy, Ea.
In fact, an increase in the initial fragmentation of the diamond particles raises the penetration coefficient and affects the infiltration kinetics and HPHT conditions.
In: HIGH PRESSURE INFLUENCE IN THE STRUCTURE AND PROPERTIES OF THE SUPERHARD MATERIALS.
These variations are due to the several distinct processing techniques that are differentiate by specific factors such as the high pressure device (HPD), the diamond particle size, type of binder, heating system, among others [4,5].
It was also found that the factors with higher importance determining the impregnation kinetic were the pressure difference, ∆p, the penetration coefficient Kp and the activation energy, Ea.
In fact, an increase in the initial fragmentation of the diamond particles raises the penetration coefficient and affects the infiltration kinetics and HPHT conditions.
In: HIGH PRESSURE INFLUENCE IN THE STRUCTURE AND PROPERTIES OF THE SUPERHARD MATERIALS.
Online since: May 2016
Authors: Iveta Skotnicova, Denisa Donová, Naďa Zdražilová
Acoustic properties of building structures are currently very actual theme with regard to the development of new building and insulating materials, while the methods for estimating the airborne sound reduction index evolved mainly in the second half of the 20th century.
Representative value, which is compared with standards - CSN 73 0532 Acoustics - Rating of sound insulation of buildings and acoustic properties of building elements – Requirements, is then single number value expressed as a weighted sound reduction index RW, R´W.
This type of construction was chosen especially considering the fact, that the characteristics of the individual cladding materials are still evolving and their mechanical parameters can be significantly different from the parameters of materials used at the time when the selected prediction methods were determined.
Factors Affecting Sound Insulation Ability of Light-weight Wall Constructions Airborne sound insulation of double building structures (Fig. 1 and Fig. 2) is very complex characteristic which is affected by many factors.
Vodickova, Airtightness and acoustic properties of family house from straw.
Representative value, which is compared with standards - CSN 73 0532 Acoustics - Rating of sound insulation of buildings and acoustic properties of building elements – Requirements, is then single number value expressed as a weighted sound reduction index RW, R´W.
This type of construction was chosen especially considering the fact, that the characteristics of the individual cladding materials are still evolving and their mechanical parameters can be significantly different from the parameters of materials used at the time when the selected prediction methods were determined.
Factors Affecting Sound Insulation Ability of Light-weight Wall Constructions Airborne sound insulation of double building structures (Fig. 1 and Fig. 2) is very complex characteristic which is affected by many factors.
Vodickova, Airtightness and acoustic properties of family house from straw.
Online since: April 2015
Authors: Xue Dong Chen, Yi Chun Han, Zhi Chao Fan, Yu Zhou
The property difference is mainly caused by vanadium through fine grain strengthening and precipitation strengthening.
Meanwhile, creep deformation and fracture behavior of metallic materials at elevated temperatures are generally key factors for the design life of high temperature components.
For simplicity, a part of the geometrical model is selected without affecting the calculation results, i.e., the distance from the loading end to the notch is 3R.
Meanwhile, the multi-axial stress state around the notch affects damage accumulation.
Secondly, the multi-axial constraint affects the material toughness [7].
Meanwhile, creep deformation and fracture behavior of metallic materials at elevated temperatures are generally key factors for the design life of high temperature components.
For simplicity, a part of the geometrical model is selected without affecting the calculation results, i.e., the distance from the loading end to the notch is 3R.
Meanwhile, the multi-axial stress state around the notch affects damage accumulation.
Secondly, the multi-axial constraint affects the material toughness [7].
Online since: December 2013
Authors: Yong Cheng Guo, Jin Long Guo
Engineered Slope is formed by artificial transformation or affected by the project.
Slope stability is directly related to the safety of the plant, even affecting the safe operation of power station.
In the actual operation process, it involves many qualitative and quantitative factors and engineering experience and expert knowledge, essentially it is a comprehensive system of systems engineering and knowledge engineering.
The ways to transfer or reduce the risk can be implemented by engineering and non-engineering measures is obtained, which has a certain application value to determine the main factors influencing the slope stability and take appropriate measures.
[4]Zhou Huoming,Sheng Qian,Li Weishu.Excavation-disturbed zone and weaken degree of mechanical properties for rockmass of tgp shiplock slope[J].
Slope stability is directly related to the safety of the plant, even affecting the safe operation of power station.
In the actual operation process, it involves many qualitative and quantitative factors and engineering experience and expert knowledge, essentially it is a comprehensive system of systems engineering and knowledge engineering.
The ways to transfer or reduce the risk can be implemented by engineering and non-engineering measures is obtained, which has a certain application value to determine the main factors influencing the slope stability and take appropriate measures.
[4]Zhou Huoming,Sheng Qian,Li Weishu.Excavation-disturbed zone and weaken degree of mechanical properties for rockmass of tgp shiplock slope[J].
Online since: April 2011
Authors: Shuan Fa Chen, Rui Xiong, Bo Wen Guan
There are 3 key factors to determine that the brucite fiber can be used in asphalt concrete. (1) The adhesion property with the asphalt. (2) Tensile strength. (3) Construction performance: dispersion uniformity and heat resistance.
Results of the low temperature anti-cracking performance of the brucite fiber asphalt binder, the burcite fiber asphalt concrete and the related factors affecting the possible application of brucite-fiber-reinforced asphalt concrete are reported.
From Table 1, it can be seen that brucite fiber have some excellent properties, such as the high tensile strength which is acceptable mechanical performance and the stable chemical composition.
The properties of asphalt binder in low temperature are decreased by the addition of fiber.
(2) Properties of asphalt concrete in low temperature are improved by adding brucite fiber.
Results of the low temperature anti-cracking performance of the brucite fiber asphalt binder, the burcite fiber asphalt concrete and the related factors affecting the possible application of brucite-fiber-reinforced asphalt concrete are reported.
From Table 1, it can be seen that brucite fiber have some excellent properties, such as the high tensile strength which is acceptable mechanical performance and the stable chemical composition.
The properties of asphalt binder in low temperature are decreased by the addition of fiber.
(2) Properties of asphalt concrete in low temperature are improved by adding brucite fiber.
Online since: April 2014
Authors: An Biao Wang, Chun Bo Liu
Introduction
A liquid crystal, as a typical anisotropic material, consists of rod-like or disc-shaped molecules, whose physical properties such as dielectric constants, magnetic susceptibilities, viscosities, and elastic constants depend on the orientation state of the molecules; in other words, it has anisotropy [1].
Our laboratory (LIQUID CRYSTAL LAB OF HENAN UNIVERSITY OF TECHNOLOGY) is dedicated to the study of the anisotropy of liquid crystals from the mechanical viewpoint and aims to develop disciplines in the mechanics or dynamics field of liquid crystals, to apply the findings to elementary techniques in mechanics, and to develop novel microfluidics drive and control technology that is considerably different from conventional ones [2].
Previous research showed that many of the most important physical phenomena exhibited by the nematic phase, such as its unusual flow properties or its response to electric and magnetic field, can be studied by regarding the liquid crystal as a continuous medium.
With the 1-D model, there are two important factors affecting the kickback effect: the gap of the cell and the velocity of the upper plate when the electric field is released. 2.
Liang, The influenced of carbon fiber orientation on the mechanical and tri-biological behavior of carbon fiber/LCP composites, Materials Chemistry and Physics, 102(2007), 187-194 [6] Y.
Our laboratory (LIQUID CRYSTAL LAB OF HENAN UNIVERSITY OF TECHNOLOGY) is dedicated to the study of the anisotropy of liquid crystals from the mechanical viewpoint and aims to develop disciplines in the mechanics or dynamics field of liquid crystals, to apply the findings to elementary techniques in mechanics, and to develop novel microfluidics drive and control technology that is considerably different from conventional ones [2].
Previous research showed that many of the most important physical phenomena exhibited by the nematic phase, such as its unusual flow properties or its response to electric and magnetic field, can be studied by regarding the liquid crystal as a continuous medium.
With the 1-D model, there are two important factors affecting the kickback effect: the gap of the cell and the velocity of the upper plate when the electric field is released. 2.
Liang, The influenced of carbon fiber orientation on the mechanical and tri-biological behavior of carbon fiber/LCP composites, Materials Chemistry and Physics, 102(2007), 187-194 [6] Y.