Search results

Since the MCFs have excellent mechanical and electrical conductivity properties, they are suitable for filling resin/graphite matrix well.
As we can see from Fig.5, there is also a dividing point of the MCF content affecting the composite electrical conductivity.
The liquid-phase treatment effect of the MCFs was affected by a number of factors.
Based on the requirements of the tests, we determine the following three factors: the mole ratio of H2O2 to FeSO4·7H2O, pH values and UV irradiation time as the main experimental factors.
Study on the electrical and mechanical properties of phenol formaldehyde resin/graphite composite for bipolar plate.

Furthermore, the project addresses important factors affecting the quality and durability of the coating system.
An important factor in the evaluation was to determine the mechanical properties of the film [1,2,3].
The classification level of 0 was achieved in the test, which means that the coating system exhibits very good adhesion property.
The formation of corrosion in a material where a coating system has been applied is immediately influenced by several factors.
And that is why these factors require close attention.

S funnel-shaped specimen (GJB1997-94)is made of raw material bar (<22mm) to be suit for the test under corrosive environment, which can be found in Fig.1.The chemical composition and mechanical properties are shown in tables 1 and 2,respectively.
The shape of specimens (Kt=1and Kt=3) for low cycle fatigue test Table 1 The chemical composition of 7XXX Aluminum alloy bar Zn 5.9～6.9 Mg 2.0～2.7 Cu 1.9～2.5 Zr 0.08～0.15 Fe 0.15 Si 0.12 Mn 0.10 Cr 0.04 Ti 0.06 Al allowance Table 2 The mechanical properties of 7XXX Aluminum alloy bar E, Gpa 70.8 σb, Mpa 590.2 Ψ, % 17.92 Ec, Gpa 68.8 σpc0.2, Mpa 555.8 σc0.7,Mpa 578.4 Experiment.The fatigue tests staircase experiment were carried out under room and humid environment.
The humid environment affects the mean value of fatigue strength for pre-corroded 7XXX aluminum alloy with the corrosion-influence-factor of 0.973(Kt=1), 0.971(Kt=3).
The humid environment makes the dispersivity of fatigue life of pre-corroded 7XXX aluminum alloy greater and affect fatigue life eigenvalue and reliability life of 99.9% with the corrosion-influence-factor of 0.7339(Kt=1), 0.8603(Kt=3) and 0.1513(Kt=1), 0.2158(Kt=3), respectively.
Vol.50 No. 9(2008), P. 2588-2595 [8] XiangJin Si: Study on Low Cycle Fatigue Properties of A4 Aluminum Alloy Forging in Corrosive Environments(Nanchang university,Nanchang2007)

Analysis of Influencing Factors of Ultrasonic Nondestructive Testing with Carbon Fiber Reinforced Plastics Di Xuea, Jinbo Zhangb, Caihua Lic College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007, China a444617059@qq.com,bCorresponding Author: zhangjinpo9872@sina.com,clicaihuajms@163.com Keywords: Nondestructive testing; Ultrasonic wave; Sensitivity; Canbon fiber reinforce plastics; Composite material Abstract.
In order to research the influenced factors of sensitivity of ultrasonic nondestructive testing, the compared experiments using water immersion and contact method were carried out and the experimental results of sensitivities were obtained.
The CFRP has been widely applied in many fields because of its excellent mechanical properties[2].
At the same time, it also studies how step and focus affect the sensitivity in the process of non-destructive testing.
The properties of the probe.

The state analysis and evaluation of the furnace pipe including of riser pipe, collecting gas pipe run over service period by EPMA, dye penetration inspection, macro and microstructure analysis, mechanical properties at room and high temperature and high temperature rupture property.
It is very important to understand the state of microstructure and properties of furnace pipes after the equipment has been running for on hundred thousand hours.
So, the microstructure, mechanical properties and life prediction and assessment of the main components of radiant section harp pipes run for 100,000hrs are done in this paper.
This shows that the various parts of the rising pipe do not exceed the normal operating temperature, the microstructure is good and in early or middle service time. 3.3Mechanical property and remaining life The mechanical properties of the rising pipe and collecting gas pipe at room and 980 °C for short time meet the technical standard[1,5].
Now there are some main analysis methods, for example, FEA simulation and calculation method, K factor inversion method, comprehensive analysis.

The parameters affecting the surface finish are found as Spindle speed, feed rate, Depth of cut, number of passes, work piece material, and lubrication [1-8].
The strength and good mechanical properties make the 6063 aluminium alloy appropriate for the use in aerospace industry.
The chemical composition and mechanical properties of the work piece material is given in Table 1.
Table 1 Chemical composition and mechanical properties of Aluminium 6063 alloy Chemical Composition Copper Silicon Manganese Other Iron Aluminium 0.10% 0.20% 0.45% 0.45% 0.35% Balance Mechanical Properties Tensile Strength (Mpa) Yield stress (Mpa) Density (kg/cm3) Thermal conductivity (w/m-k) Elongation (%) Hardness (HV 100) 241 214 2.7 200 12 83 The work piece material, as shown in Figure 1, was of size 98mm×98mm×10mm, on which 9 pockets of size 16mm×16mm were milled based on selected parametric values, using VF-2 HAAS milling machine with 16mm diameter Carbide four flute end mill cutting tool.
The percent contributions of the milling parameters on the surface roughness and Material removal rates are shown in Table 10 and Figure 3. spindle speed (45.39%) was found to be the major factor affecting surface roughness and material removal rates, whereas feed rate (43.83%) & depth of cut (7.71%) , were found to be the second, and third ranking factors respectively. 4.3 Confirmation Test After evaluating the optimal parameter settings, the next step is to predict and verify the enhancement of quality characteristics using the optimal parametric combination.

An adhesion in this system is one of the most important factors that affect the durability of repair [5].
They identified NDT method/methods appropriate for assessing factors affecting concrete structures durability.
of layered system, such a pavements, interlayered good or poor concrete Repair System as an Object of NDT Testing Factors affecting stress wave propagation.
Modification by polymers caused 2-3 times increase of mechanical properties depends on polymer and filler contents.
Garbacz, Near-to-Surface properties affecting bond strength in concrete repair, Cement and Concrete Composite 2014, p.73-80

The design and dimensional characteristics of the spinneret affect not only the geometry of the hollow fiber, but also the transport properties of the hollow fiber membranes.
Understanding of the processes occurring during the formation of hollow fiber membranes requires considering the influence of a number of factors on which the structure and properties of the resulting membranes depend.
The structure of hollow fiber membranes obtained by the phase inversion method is mainly determined by thermodynamic and kinetic factors [4, 10].
There is also a relationship between the value of ideal selectivity and the maximum pore size of the membranes, which affects the separation properties of hollow fiber PSF membranes.
Conclusion Thus, the design and dimensional characteristics of the spinneret affect not only the geometry of the hollow fiber, but also the transport properties of the hollow fiber membranes.

Influence Factors Analysis of CFG Piles Treatment.
By analyzing pile length, modulus and spacing of CFG piles composite foundations, we can find that highway soft ground subgrade settlements are affected by the following influence factors. 1.
The modulus of CFG pile, which is determined by the material properties of cement, fly ash and gravels, should be designed in the range of optimum values. 3.
Space between piles is the most significant influence factors of settlement control in CFG piles composite foundations.
In summary, pile spacing affects most among the influence factors in settlement control treated by CFG pile composite foundation.

Using this model, numerical simulation of the single spark of EDM process has been carried out with parameters such as conduction, convection, the latent heat of phase change, thermal properties of material with temperature and gauss distribution of heat flux to predict the temperature distribution in the discharge point of cathode as a result of single discharges in EDM process.
ANSYS version 12.0 has been used to develop a numerical model of the EDM process, and the model considered the important factors of the EDM process such as conduction, convection, the latent heat of phase change, thermal properties of material with temperature and gauss distribution of heat flux to analyze the temperature distribution of cathode electrode.
Important factors which contribute to the accurate calculation of temperature distribution of affected zone in single spark EDM process includes the amount of heat input, radius of plasma spark ,the fraction of energy distribution and the thermo-physical properties of material.
In the beginning of discharge, the temperature of heat-affected zone is low as shown in figure5.
With time increasing, the temperature of heat-affected zone enhances to the boiling and vaporization point, and the heat-affected in the vertical direction is smaller than that in the radial direction.