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Results show that processing temperature is a key factor as intensity of the N1s peak increases gradually while processing temperature improves, furthermore, when temperature is 175℃, the most intensity of the N1s peak is obtained.
Introduction The mechanical properties of carbon fiber composites are dependent on the properties of the carbon fiber and the matrix, and the effectiveness of the interfacial adhesion between the carbon fiber and the matrix.
(a) (b) (c) (d) Fig.1 XPS survey spectra of carbon fibers (a)untreated ,(b) 1#,(c) 2#,(d) 3# Table 2 XPS surface element analysis data Element/At.% C1s O1s N1s Si2p O1s /C1s N1s /C1s Si2p/C1s Untreated 70.31 18.57 1.05 10.08 0.26 0.02 0.14 1# 70.2 16.05 7.29 5.28 0.23 0.10 0.08 2# 70.89 16.68 6.23 3.63 0.24 0.09 0.05 3# 74.47 11.94 9.71 2.33 0.16 0.13 0.03 Obviously, temperature is the main factor that affects the oxidation degree.
Although we have not yet understood the interaction between treatment parameters and fiber by present theoretical research and device, it can be confirmed that processing time is an important factor for that.

It is the passive earth pressure that keeps the mechanical equilibrium.
In this paper, factors of capacity of screw anchor are analyzed fully based upon the results in laboratory, the mechanism of soil mass failure is deduced, and the formula of calculation for the capacity of screw anchor is obtained.
Before loading, the imitative screw anchors will be embedded in sand with designated density and the properties of soil are shown in table 1 and table 2.
The size of the plate is an important factor of capacity which will develop with the diameter of plate.
When deeply embedded, structure plays an more important role in affecting capacity instead of weigh of soil[12].

Rock Bolting Numerical Simulation Research and Application of The Face Breakthough You lin Xu 1,a, Hui Zhang 2,b, Wei Zheng 3,c 1 Beijing Mining Research Institute, China Coal Research Institute, Beijing, 100013, China, 2 Faculty of Resources & Safety Engineering, CUMTB, Beijing 100083, China, 3 Mining College of Guizhou University, Guiyang , 550003 a xuyoulin2006@163.com,b caikuangzhang@163.com,c zhengweicaikuang@126.com Key words: Breakthough, Simulation, Stress field, Prestressed Abstract: This paper analyzes the importance of rock bolting in coal mining, and the difficult of using rock bolting in breakthough with the affect of mining, adopt hydraulic fracturing and coal-rock mass strength test methods to test the seam stress and rock strength.
Figure 1 4109 Roadway layout plan Figure 2 Histogram comprehensive roadway rock Support Stress Field Analysis The coal-rock mass strength, structural and integrated stress field is the three elements of engineering coal-rock mass, there is necessary link and relevant between them[1]. under the interactions and influence between the three elements, showing coal rock mass mechanical properties, deformation and failure characteristics. the coal-rock mass’s stress change under the influence of the mining is the main factors of the destruction of deep coal-rock, it is more likely to appear coal rock mass power damage phenomena like coal and gas outburst, rock burst and so on in depth coal mines.
For time, the in-Situ rock stress field appear first, then have the mining stress field and rockbolting stress field; For space, the in-Situ rock stress field exists in the crust, the mining stress distributes in the area which affected of extractive activities, while the rock bolting stress field distributes in smaller bolting area.
Numerical model used Moerkulun model, physical and mechanical parameters of coal rock mass show in Table 1.
Table.1 Physico-mechanical parameters of coal and rocks Parameter Coal Roof Mezzanine Floor r(kN/m3) 14 24 25 13.4 Young’Modulus(MPa) 2400 3100 3600 2600 Poisson's ratio 0.33 0.3 0.3 0.29 0.26 Compressive strength(MPa) 20 30.6 83 17.6 Tensile strength (MPa) 0.49 2.3 2.3 8.1 Cohesion (MPa) 2.7 4.8 4.8 2.5 Friction angle (°) 28.1 32 32 44 August 2010, the researcher use the hydraulic fracturing method to test the geomechanical of two measuring points.

Since the rate of flow of the powder mixture from the feeder cassette of the press machine in the case under consideration depends on its geometric parameters, physical and technological characteristics of the powders used, the influence of the design parameters of the loading device, the granulometric composition of the powders and other factors on the thickness of the outer or inner was studied layers of the resulting products.
Formula (12) allows not only to calculate the thickness of the layers of bimetallic bushings depending on the above factors, but also to solve the inverse problem, i.e. for a given thickness of the product layer, design equipment with the necessary dimensions.
Slautin, Investigation of the effect of cold rolling on the structure and properties of the heat-affected contact zone of copper-aluminum bimetal obtained by explosion welding, Rental Production, 2003, № 11.
Kashitsyn, Physico-mechanical characteristics of wear-resistant coatings. - Powder metallurgy, 1974, №3.
Harish, Structure and properties of the composite magnetic system of a magnetoelectric device obtained by powder metallurgy methods.

Abdullah3,e 1 Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia. 2 Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia. 3 Department of Mechanical and Materials Engineering, Universiti Kebangsaan Malaysia, Bangi, 43600 UKM Bangi, Selangor, Malaysia.
Indeed, many methods have been developed to describe the life time behavior under thermo-mechanical, especially with the latest, thermo-mechanical fatigue life assessment of aluminium components using Sehitoglu model [1].
In short, it is evident that the temperature is one of the major factors that affect the fatigue characteristic specifically the fatigue strength of low carbon steel or any other materials.
Due to material properties are sensitive to variation of temperature therefore temperature was accurately controlled by electrical thermocouple with tolerance of ± 2°C.
Temperature affects on fatigue behavior are shown in this figure regarding changes in position of data collected by similar stress ratio.

As one of important parameters for the tire quality, tire uniformity means that tire circle properties can keep constant under both static and dynamic conditions, such as the tire imbalance, size deviation and force variation [2].
So to study the influence of different factors on the test precision has important significance.
So the mesh in weld seam and heat affected zone need to be refined while the mesh far away from these areas could be scattered [10].
But in some cases, some stress state of the structure may affect the displacement when the frame reaches the resonant frequency [12].
Conclusion According to the analysis above, the main factors which should be considered in the design and optimization of the frame are as follows: (1) The natural frequency of the frame should be forty times more than the rotation of tire when the force variation of the tire is decomposed into tenth harmonic; (2) The first three mode bending vibration amplitudes of columns are larger.

Introduction Zirconium dioxide (ZrO2) has broad applications for many engineering problems due to its outstanding thermal and mechanical properties [1,2].
Factors affecting the width and shape of the EPR signal in nanosized ZrO2 samples are described in [4-7].
The properties of these signals are a subject of forthcoming research.
Kameneva, Evolution of the phase composition and physico-mechanical properties of ZrO2 + 4 mol % Y2O3 ceramics, Physics of the Solid State 46 (2004) 254-257
Cai, The study of surface properties of ZrO2, Appl.

Properties and details of the TPC tapes and the panels are shown in Table1.
Properties of the GF/PP thermoplastic composite panels.
Table 2. summarizes the total factors of the welding process, thermoplastic material factors, and their levels.
Factors and the factor levels of the experiment.
Hung, Factors affecting the joint strength of ultrasonically welded polypropylene composites.

The wear properties of the phosphate coatings are dependent on the surface finish and the material used for the sliding counter face.
The operating parameters that affect the wear characteristics of the manganese phosphate coated substrate includes material property, loading conditions, environmental factors, surface roughness of the contact surfaces etc…The main objective of this paper is to investigate the influence of applied load, surface roughness, sliding distance on coefficient of friction and volumetric wear loss.
The mean S/N values for the three levels of all the factors are calculated and tabulated as shown in Table 4.
The objective of S/N ratio is to measure the performance and to develop products and processes insensitive to noise factors [17].
J.Perry,T.S.Eyre :The effect of Phosphating on the Friction and wear properties of Grey cast iron,Wear,vol.43,pp185-197,1977

The alloy subjected to FSW process showed enhancement in the mechanical properties. 4.
Vilaca “Influence of friction stir welding parameters on the microstructural and mechanical properties of AA 6016-T4 thin welds” Materials and Design, 2008
Viswanathan “Microstructure, Residual Stress Distribution and Mechanical Properties of Friction-Stir AA 6061 Aluminium Alloy Weldments” Indian Society for NDT, 2007
Pakdil “Effect of post-weld aging on the mechanical and microstructural properties of friction stir welded aluminum alloy 7075” Archives of Materials Science and Engineering, 2008, pp 105-109
Senthil Kumar “Relationship between process parameters and mechanical properties of friction stir processed AA6063-T6 aluminum alloy” Materials and Design, 2011, pp 3085-3091