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The load sharing was affected obviously by asymmetry of gear backlashes, stiffness of shaft supporting and gear position.
Split torque transmission design needs to study how internal parameters of transmission system affect load sharing and the interaction of internal parameters affect load sharing, this study shows different parameter how to affect load sharing, and it can improve the split torque transmission design.
Solving and results is defined as load sharing coefficient (, as power of two power path), while , load sharing coefficient will be 1; the more differ power between , will bring larger load sharing coefficient and poorer load sharing properties.
(3)The installation and other factor causing asymmetric gear blacklash on both sides which greatly affecting load sharing, reducing the asymmetric gear blacklash is the key to improving performance of load sharing
Chinese Journal of Mechanical Engineering, 2008,44(7):52-57 [11] J.G.

Silk hydrogels have been thoroughly studied for potential biotechnological applications due to their exceptional mechanical properties, biocompatibility, controllable degradation rates, and self-assembly into β-sheet-rich networks [6].
Therefore, it is necessary to explore the formation mechanism of SF gel and its influencing factors.
The formation of SF gel mainly includes hydrophobic interactions, hydrogen bond formation and electrostatic interactions [7] and there are many influencing factors such as temperature, SF concentration, pH and ions, which significantly affect the gelation process.
Yucel et al [11] resented a simple vortexing technique to employ the shear gradient –induced changes in SF structure and solution viscoelastic properties to control the postvortex selfassembly and hydrogelation kinetics.
It is likely that several physical factors related to sonication, including local temperature increases, mechanical/shear forces, and increased air-liquid interfaces affect the process of rapid gelation of SF.

Of course, the presence of voids in matrix structure affects on the local deterioration of mechanical properties of casting.
The main role of casting design virtualization in this approach to predict the structure continuity & phases and also the local mechanical properties is irreplaceable.
The presence of discontinuities in the material structure may have different effect on the deterioration of mechanical properties.
Validated by experimental validation maps of these local properties of castings can be used to construction optimization during design of cast products, taking into account the mechanical properties gradient [9].
The identification of variation of mechanical properties should be done with high circumspection being result of researcher experience or/and future validation works

With the development of numerical methods and computer technology, the mechanical behavior of arch dam under the seismic load can be simulated using numerical simulation method.
In the numerical model, there are many factors that can affect the dynamic response of arch dams such as: reservoir models, nonlinear of transverse joint, absorbability of reservoir bottom, traveling wave effect of seismic waves radiation damping of dam foundation[2].
Since the mechanical property of the base is uniform near the dam foundation, the simplified homogenous foundation is used in the model.
Fig.1 finite element models of arch dam-foundation system (additional mass model) Fig.2 finite element models of arch dam-foundation system (fluid finite element model) Different reservoir models affecting the dynamic characteristics of the dam: The former 8 natural frequencies and vibration modes were calculated using block Lanczos method.
Earthquake analysis of arch dam factors to be considered [C], The 14th world conference on earthquake engineering, Beijing, 2008 [3] Fenves G L, Mojtahedi S, Reimer R B.

Most toy robots, especially the mechanical ones, stand on two feet, each of which has a very large sole area.
Research results by scholars at home and abroad on the analysis, parameter configuration, application, and troubleshooting of the mechanisms and properties of biped robots was gathered and studied.
In addition, the inclination angle of the robot during walking is affected by the location of the center of gravity of the trunk and the distance between the feet.
Thus, the stability of the walking robot is determined by many factors, and difficulty in walking may arise if any of these factors is changed.
Fong: Mechanical Design of a Simple Bipedal Robot.

The shape factors statistics are shown in Fig. 9.
Typically, a shape factor refers to a value that is affected by an object's shape but is independent of its dimensions.
Chen, Effect of heat treatment on mechanical properties of heavily cold-rolled Fe-6.5wt%Si alloy sheet, Sci.
Chen, Microstructure and mechanical properties of rapidly quenched Fe-6.5 wt.% Si alloy, J.
Dong, Effects of Ti addition and reheating quenching on grain refinement and mechanical properties in low carbon medium manganese martensiteic steel.

Study on the Abrasive Effecting Factors of the Removal Rate during Dual-Lapping Sapphire Wafer ZHANG Kehua1, 2, a , WEN Donghui 1, b , and YUAN Julong 1, c 1 The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Hangzhou, 310032, China 2 Institute of Machinery Equipment and Measurement & Control Technology, Zhejiang Normal University, JinHua, 321004, China a mature@126.com, bwdh_74@163.com, cjlyuan@zjut.edu.cn Keywords: Sapphire Wafer, Dual-Lapping, Materials Removal Ratio, Surface uniformity Abstract: Dual-lapping was a process to planarize the surface of the sapphire wafer, the nature of surface&subsurface damage and the surface uniformity was depended on the material removal mode and materials removal ratio.
Introduction The sapphire (α-Al2O3) is accepted as the wafer material for LED, because of the crystal lattice of sapphire is similar with GaN's, and could meet the demand of bearing high temperature, it has the high temperature stability and mechanical property, so it is the key wafer material for LED [1,2].
So the uniformity and light transmission of the thin film thickness was changed, it was the factor that direct affected the luminous efficiency and stability of LED [4].
Acknowledgement The authors gratefully acknowledge the funding for this work from Natural Science Foundation of China (Grant No. 5035040 and No.50705088) and the Open Fund project of the MOE Key Laboratory of Mechanical Manufacture and Automation of Zhejiang University of Technology (Grant No. 56310202019).

Recently, the increasing usage of carbon fiber reinforced polymer (CFRP) composite appears to be a solution for rehabilitation and strengthening of the concrete structures because of its physical and mechanical properties, such as high strength-to-weight ratio, high corrosion /environmental degradation resistance, and easy to handle during construction.
CFRP has exceptional properties such as light weight, high tensile strength and stiffness and resistance to both chemicals and corrosion, make them particularly suitable for rehabilitation.
Practically, moisture and salinity are the factors that have a great influence on the CFRP strengthening system.
The results also shows that, height and the distance from the sea are the factors which influence in the intensity of attack by chloride ions.
For design requirements based on factors such as the accessibility of the site, project budget and the amount of increase required in the shear capacity the strengthening scheme needs to be selected.

The simulation uses standard finite software is able to solve complex thermo-mechanical problems.
The chip segmentation affects the machining process such as cutting forces,temperature and workpiece surface quality,so a comprehensive realizing of this phenomena is essential.
(2) In order to achieve optimum simulation results,the MJC was chosen in the simulation.According to the work of Li and He[2],the constitutive material constants used in the simulation are reported in table 1.The mechanical properties of Ti-6Al-4V titanium alloy are given in the table 2.
Table 1 Parameters of the JC law[2] A (Mpa) B (Mpa) n C m 968 380 0.421 0.0197 0.577 Table 2 Mechanical properties of the titanium alloy Ti-6Al-4V Tensile stress(MPa) Yield stress (Mpa) Elongation (%) Reduction in area(%) Young modulus(GPa) Hardness (HV) Density (g/cm3) 940 857 10 25 117 340 4.5 Due to the Johnson-Cook model can not directly degrade the yield surface.
This section only change the single factor,which is the cutting depth,to analyse the influence of the cutting depth on serrated degree and the tooth width.

The accuracy of this non-destructive monitoring technique relies upon several factors: some factors are distinctive of the equipment and software (SW) selected for the measurements/post-processing (i.e. distortion of the lenses, interpolation and correlation algorithms) whilst others are defined and controlled by the operator before and during the test (i.e. superficial speckle pattern and light distribution).
Among these factors, the surface preparation seems to play an important role on the precision of the measurements and it is recommended to have a surface showing a random pattern of dots, as much as possible non-repetitive, isotropic and with high-contrast chromatic areas, so that each point of the surface could be recognized and tracked by the DIC.
These tools were employed to calculate the evolution of the principal strains during the mechanical test (Fig. 7b) and the main masonry mechanical properties.
a) b) Figure 7: Position of the three virtual extensometers on the rear wall face (a) and resulting stress-strain diagram (dotted lines) compared with LVDTs measurements (b) Table 3: Comparison of the mechanical properties determined by LVDTs and DIC ε’m [%] ε’t [%] E [MPa] ν G [MPa].
Digital image correlation analysis of interfacial debonding properties and fracture behavior in concrete, Eng.