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The shear capacity and bond stress capacity are the two major factors affecting the strength of a joint core in RC structure.
The behaviours of exterior and interior connections have different parameters such as concrete compressive strength and geometry of connection, joint slenderness, material properties, and reinforcement were observed [2].
The aspect ratio is the determining factor based on the shape and size of fibre having the same properties.
Generally, the shear transfer mechanism in reinforced concrete varies depending on the material properties and the bond stress action.
Table 6 represents all the input data for steel properties.

Based on the open excavation area from Yulu Station to Wulidian Station in Chongqing subway circle lines, the finite element software Ansys was used to establish three-dimensioned model to calculate and analyze the mechanical characteristic of the pile-support supporting.
The choice of supporting schemes directly affects the size of this change.
Vertical spacing is 4.3 m and the second layer and third layer is 4.5m. 2 The finite element model analysis 2.1 calculation model In order to analyze the mechanical characteristics of supporting structure during the process of excavation, finite element software Ansys to establish three-dimensional model(Fig.1,Fig.2) is used based on the size of the support and surrounding rock pile, plate, and such factors as the position of the mutual relationship.
Table1 Material physical and mechanical parameters Item Backfill Mudstone Concrete Support Specific weight γ (kN/m3) 20 22 2500 7850 Internal friction angle φ (°) 28 35 —— —— Cohesion C (kPa) 28 500 —— —— Elasticity modulus E (MPa) 17 2000 30000 210000 Poisson ratio μ 0.35 0.23 0.2 0.2 Simulating the construction steps are as follows: 1) The initial ground stress field calculation. 2) The pile and plate construction simulation. 3) The installation of support and foundation pit excavation simulation. 2.3 The calculation results Through software, simulate internal force change of pile and support in the process of tunnel layering excavation.
Fig.6 Support Axial Stress Broken Line Graph 3 Conclusions By finite element software ANSYS, analyze the properties change of supporting structure in the open cutting area and the conclusions are as follows: 1) During the tunnel construction, supports provide a good supporting effect and the supports stress conforms to the use requirements.

Because traditional resonant linear piezoelectric motors work in the unstable resonance state, the process error, frictional temperature rise and other factors will affect the stability and the mechanical properties of these motors [6].
(2) Fig. 2 Displacement amplification of drive foot Let lever magnification factor is γ.
Thus: (5) Where, γ and γ’ is the displacement amplification factors of x-axis and y-axis respectively and both are constants greater than 1. xc and yc is the displacement of point C in x direction and in y direction.
The displacement of the Y-axis was inversely proportional to tangent value of θ, i.e. the less the angle θ is, the larger the magnification factor is.
Then the maximum magnification factor can be obtained when H is 0.8mm and θ is 12°

Micro-defects inside metal matrix composite structure seriously influence the mechanic properties of materials and can undermine machine operations.
However due to the special processes in the making of MMCS, minute differences in the processing variables may lead to defects and flaws in the structure, which will do harm to its mechanical performance and integrity.
Presently traditional ultrasonic test is good enough for the testing of complete air debond but is helpless for the mechanical one.
Though both of the coupling quality between the transducer and the specimen and the performance of the transducer may affect the experiment result, this method is more practicable since it is simpler, more convenient and more practical.
As we all know that many factors may affect the results in ultrasonic experiments, such as the couplant and the pressure of the probe.

Experimental Study on the Second-order Buoyancy of Magnetic Fluid He Xinzhi1,2 Li Decai2,b Yang Wenming2 Zhang Haina2 1School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China 2 School of Mechanical Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China bdcli@bjtu.edu.cn Keyword: Magnetic Fluid, Buoyancy, Fluid Statics Abstract.
And the rule describes factors affecting the levitation force under the same condition [13].
However, the measurement of the radial levitation force suffered by the cylindrical magnet which immersed in the magnetic fluid has not been reported, so as to the influence factors.
The radial second-order levitation force suffered by the cylindrical magnet which immersed in the magnetic fluid was measured by experiment in this paper, and the influence factors were analyzed as well.
The influences on the value of levitation force made by the above factors are discussed by the experiments in this paper.

Study on Distribution of TiC Particles in Molten Steel under Electromagnetic Stirring Condition Bin Shibo1,a,Xing Shuming1,b and Bao Peiwei1,c 1School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong university, China a09116335@bjtu.edu.cn,bsmxing@bjtu.edu.cn,c pwbao@bjtu.edu.cn Keywords: Electromagnetic stirring; Unit stirring power; Reinforcement; Distribution Abstract.
The influencing factors on distribution such as the unit stirring power(P), the styles of TiC particles addition and the methods of surface pretreatment had been studied in our experiments.
However, the heterogeneous distribution of reinforcement directly affects the composite’s organizational structure and usability[4].
Table 2 Distribution effect of TiC particles in steel matrix Distribution effect P（KW/Kg） U （mm） （mm） Influencing factors Decreasing tendency of P 7.0 1.81 3.27 3.20 6.0 1.46 3.45 5.0 1.13 3.31 4.0 1.35 3.55 Increasing tendency of P 4.0 1.22 3.86 5.0 1.58 3.45 6.0 1.43 3.50 7.0 1.55 3.65 Styles of addition Impendency addition 2.63 4.12 precastblock addition 1.36 4.17 Bottom injection addition 1.15 3.32 Influencing factors on particles distribution Effect of stirring power on distribution Fig.1 is the metallographic structure of PRSMC with P showing decreasing tendency, and Fig.2 shows the case of P increasing.
:Special Casting and Non-ferrous Alloy Vol.28(2008),p.581 [9] Han zhicheng.: Journal of North China University of Technology Vol.6(1994),p.34 [10] TAKAMICHI IIDA, RODERICK I.L.GUTHRIE(coauthors).Xian aiping, Wang lianwen(translators), physical properties of liquid metal.

Synthesized CHA mimic for composition, structure, nano dimension and morphology bone apatite crystals and their chemical-physical properties resemble closely those exhibited by enamel natural apatite.
The experimental results point out the possibility to use materials alternative to fluoride compounds which is commonly utilized to contrast the mechanical abrasions and acid attacks.
Poorly crystalline HA nanocrystals have excellent biological properties, lack of toxicity and inflammatory and immunologic responses.
In addition they show bioreabsorption properties under physiological conditions.
Dental erosion in Icelandic teenagers in relation to dietary and lifestyle factors.

Cheng4 School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China, 1 qiujian1981@126.com, 2 gongyd@mail.neu.edu.cn Keywords: Quick-point grinding, Grinding force, Material removal rate, Chip formation mechanism Abstract.
It is found the grinding force is influenced by the factors such as cutting depth, wheel velocity, grinding angle as well as equivalent diameter, respectively.
(3) Modeling Quick-point Grinding Force In continuous grinding process, workpiece deformation caused by grinding force is a main factor that affects grinding accuracy.
Where W is the normal load, is the contact area, and 0A τ and η are coefficients which are determined by physical and mechanical properties of contact zone [2].
Separating the workpiece velocity on the plane of grinding wheel, a mathematical model among the three factors is built to analyze the grinding mechanism.

The general-purpose non-linear finite element analysis software ABAQUS is adopted to simulate the mechanical performance and overall buckling of aluminium alloy columns.
The general-purpose non-linear finite element analysis software ABAQUS is adopted to simulate the mechanical performance and overall buckling for aluminium alloy columns.
Factors affecting the ultimate strength of aluminium alloy columns such as material properties, section profile, failure mode, slenderness ratio, support seat condition, initial geometric imperfections and initial eccentricity are analyzed in this paper.
Mean values of the test results for the tensile property are shown in Table 2.
Generally, three factors including material properties, initial imperfection and boundary conditions play important role in influencing the results of simulation and test.

Study on Tool Life and Tool Wear Mechanisms in Dry Cutting Pure Iron KONG Jinxing1, 2 a, LI Liang1, b , XU Dongming2,c , HE Ning1, d 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 210016, P.R.China 2Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, P.R.China akjxmc106@163.com, bliliang@nuaa.edu.cn, cxu_dong_ming@163.com, bdrnhe@nuaa.edu.cn Keywords: pure iron, dry cutting, tool life, tool wear mechanisms Abstract.
Tian Wensheng [3] was investigated the cutting properties of pure iron.
The results showed that tool rake face was the main affecting factors for pure iron chip deformation and cutting force.
The factors of mechanical stress, thermal stress, tool surface tissue defects and adherence, etc, would lead to layer exfoliate or massive spalling on the tool face.