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Online since: November 2010
Authors: Bo Zhao, Jin Xue Xue
Its mechanical properties are shown in Table 2.
Table 2 Mechanical properties of nano ZrO2 Parameters Vickers hardness [GPa] Elasticity modulus [GPa] Flexural strength [MPa] Fracture toughness [MPa·m1/2] Density [g·cm-3] Pyroconductivity [m·K] Specific heat [Kg/K] Poisson's ratio Value 12 360 700 9.3 6.2 2.1 610 0.27 Grinding Temperature Testing Scheme Infrared radiation and infrared thermography method are sensitive to environmental impact and other factors, so the artificial thermocouple wire clip temperature measurement method was used in our experiments as shown in Fig.2 [2-3].
The wheel speed and dressing depth are secondary influencing factors.
Feed rate and ultrasonic power are the most important factors influencing the grinding temperature.
Wheel speed and dressing depth are secondary factors.
Online since: February 2016
Authors: Ilia A. Koryashov, Andrey A. Bukharkin, Olga S. Kvashnina, Sergey M. Martemyanov
However, the task of creating an adequate physical model requires taking into account a multitude of factors.
Therefore, the similarity criteria of the physical model should include all the factors, affecting the dynamics of the sample heating and the pyrolysis products composition.
Due to high dielectric properties of the bar material, in contrast to steel, it has no effect on the electromagnetic field distribution in the sample.
Overpressure safety is provided by the mechanical protect valve calibrated at the pressure of 10.1 kgf/cm2.
[5] Lopatin V.V., Martemyanov S.M., Investigation of the dielectric properties of oil shale, Russian Physics Journal, 55 (2012) 511-515 [6] Bukharkin A.A., Lopatin V.V., Martemyanov S.M., Koryashov I.A., Electrical discharge phenomena application for solid fossil fuels in-situ conversion, Journal of Physics: Conference Series, 552 (2014) 1-4.
Online since: July 2014
Authors: Yun Wei Guo, Wen Hua Xu, Yang Jiang, Hui Hui Liu, Jia Yu Xu, Zhan Qiang Gao, Li Zhu Liu, Wei Wei Cui
This work describes the preparation and the properties of poly(vinylidene fluoride) (PVDF) porous membranes.
Poly(vinylidene fluoride) (PVDF) as one of the attractive membrane materials used in water treatment field processes many outstanding properties, including excellent chemical resistance, good mechanical properties, and having excellent resistance to most corrosive chemicals and organic compounds [5-7].
Intrinsic chemical composition is not the only factor affecting the suitability of the membrane, the morphological properties, too, play a significant role.
By selecting the correct modified material and the fabrication parameters, the morphology and the properties of the membrane can be varied, and then the membrane can be valuable for different application.
Meanwhile, the porous structure can act as a mechanical support.
Online since: August 2012
Authors: Tomasz Machniewicz, Andrzej Skorupa, Małgorzata Skorupa, Adam Korbel
At the same time, increasing the squeeze force led to improved fatigue properties of the joints, specimens assembled using the rivets with the compensator showing fatigue lives consistently longer than joints with the round head rivets.
The fatigue crack nucleation location, crack path geometry and fatigue properties of a riveted lap joint depend on the integrated effect of a number of factors related to joint design and production as well as loading conditions.
The mechanical properties (0.2% yield stress = 291 MPa, ultimate strength = 433 MPa, elongation = 13%) and the fatigue crack growth behaviour of this material are similar to those of the western Al 2024-T3 alloy [3].
For Smax=80 MPa, somewhat higher kb factors of 1.25 and 0.9 are obtained for the above t-values [1].
Design, Analysis and properties, Springer, Dordrecht, 2012
Online since: March 2011
Authors: Yu Mei Ding, Ming Feng Hao, Xue Tao He, Yong Liu, Wei Min Yang
Factors influencing diameter of polypropylene fiber in melt electrospinning Mingfeng Hao1, a, Yong Liu1,b, Xuetao He1,c, Yumei Ding1,d, Weimin Yang1,e 1College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029 China ahaomf@163.com, byongsd@iccas.ac.cn, chext@mail.buct.edu.cn, ddingym@mail.buct.edu.cn,eyangwm@mail.buct.edu.cn Keywords: Melt electrospinning, Polypropylene (PP), thin fibers, temperature, voltage Abstract.
The spinning temperature and voltage are the most important factors that influence the diameter of the fibers in melt electrospinning [5].
Effect of varying temperature on the properties of the electrospinning fibers.
Different spinning temperatures will result in different viscosities of the polymer melt, and thus will affect the diameters of the electrospinning fibers.
[3] Yong Liu, Weimin Yang, Mingfeng Hao: Research on mechanical performance of roof tiles made of tire powder and waste plastic, Advanced Materials Research Vols. 87-88:329-332(2010)
Online since: March 2016
Authors: Xiang Fang Fan, Hong Mei Zhu, Juan Zhou, Yong Chen
The influences of high energy ball-milling process factor on both the structural and magnetic properties of atomized alloy powders were studied.
Their structural and functional properties were analyzed.
Li, Influence of powder metallurgy process on mechanical properties of magnetic iron powder core, Materials Science and Engineering of Powder Metallurgy 16(2011) 558-562
Barinov, Magnetic properties of powders of Y-Co alloys prepared by mechanical grinding, Fizika Metallov I Metallovedenie 52(1981) 1184-1193
Lenoble, Microstructure and magnetic properties of nanostructured (Fe0.8Al0.2 )100-xSix alloy produced by mechanical alloying, Journal of Magnetism & Magnetic Materials 385(2015) 151-159
Online since: January 2012
Authors: Guo Zheng Liang, Yang Liu, Li Yuan, Ai Juan Gu
Research proves that peroxidase can be used to modify the PA66 and PA6 surface properties ,in the modified process, the strength and the diameter of the fiber will not reduce[14].
The grafted polymer technology is based on the enzyme catalysis , use free radicals grafted polymer ,which produced in the process of enzyme catalysis, to graft polymerization with allyl base glycidyl ether as monomer and Kevlar fiber, the graft copolymerization reaction can be divided into three procession about "initiate process", "grafted polymerization" and "reactions terminated", thus there are many factors affecting the reaction, such as grafted monomer concentration, enzyme concentration, the oxidant amount, pH value, reaction time, reaction temperature, reaction medium ,all of them influence the grafted rate of fiber.
Therefore, we think that the fiber surface properties changed, eventually the adhesion between the fiber and resin matrix enhanced.
At the same time ,the high Yc shows that grafted AGE can be potentially used to improve the fiber properties of flame retardant.
[10] Fallania F,Ruggeria G,Broncoc S,Bertoldoc M,Modification of Surface and Mechanical Properties of Polyethylene by Photo-initiated Reactions,Polymer Degradation and Stability,2003,82:257~261
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.
Online since: November 2012
Authors: Li Li, Hong Li, Yong Zheng
The heat source is modeled as a moving heat flux following a double ellipsoid distribution and the temperature-dependent properties of materials are considered.
In order to get a better distribution of the residual stress near the welding line, weld toes dressing is necessary by reheating the weld toes after the first thermo-mechanical coupling analysis in finite element simulation.
The most significant factors affecting the analysis are the heat input rate, the moving speed of the heat source, the thickness of the plate, the geometry of the heating line and the properties of the material.
In the process of analysis, the temperature dependent properties of materials are considered and the heat source moved along loop welds following a double ellipsoid distribution.
After modifying welding line of the finite element model, heat the weld toes again and do the thermo-mechanical coupling analysis once more so as to get a better distribution of the residual stress.
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.
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