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Interface nonlinear affect dynamic stiffness considerably.
However, due to some uncertainties non-linear factors, it is difficult to predict contact behavior and analyze non-linear characteristics.
The material properties are assigned respectively, including elastic modulus E=2.1×105MPa, Poisson ratio , and density In this analysis, the contact relationship to be built occurs respectively between two sheet metals and between the sheet metals and a combined bolt-nut.
It indicates that the proper pretension effect will make the dynamic behavior of connected plates better under non-linear factors.
Journal of Mechanical Engineering Science. 223(2009) 363-375

It has excellent mechanical properties which made it commonly used in automotive industry and construction of aircraft parts such as wing, fuselage and etc.
Adhesion wear strongly affected intermediate conditions by welding chips into fractures of chipping wear and unexpectedly increased tool life at 250m/min and 0.1 mm/rev.
A Comparative Study on the Microstructures and Mechanical Properties of Al 6061 Alloy and the MMC Al 6061/TiB2/12p.
Met, Some factors affecting wear on cemented carbide tools, Inst.
[5] Joseph R.Davis et al, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials,Volume 2,Metals Handbook ,10th Edition 1990

Microphotographs of the structure and interpretation of the connection of the properties of the composites and their structure are presented below.
It is necessary to know only the stability of the properties of waste and their physical and chemical and other properties that affect the components interaction of the polymer mixture components, and therefore the conditions of formation of the structure of composites and the end-use performance properties.
Thus the change of state and properties of the surface of filler particles takes place: pH, penetrative power, surface energy.
The degree of saturation of the filler surface with the active functional groups may adjust the nature of connections on the interfacial bond and thus the properties of filled polymers.
The amount of this pressure depends on various factors including the amount of the coefficients of thermal expansion of the components.

Tang Zhengning [5] analyzed the influence of fluid properties on the piezoelectric ejection process by configuring fluids of different properties.
The material properties of simulation are shown in Table 1, and the preliminary calculation results are shown in Figure 2.
In addition, material properties and the driver parameters greatly affect the inkjet effect.
The orthogonal factors and level table is shown in Table 2, orthogonal scheme is shown in Table 3.
Except for these factors examined in this experiment, other factors have little influence on the experimental results.

TVOC as indicator, four main factors in this experiment are: mixture ratio of urea-formaldehyde resin and polyvinyl acetate emulsion adhesive, amount of spread, hot-pressing time and temperature.
Table 1 Value level of various factors factors level 1 2 3 A UF:PVAc 50:50 80:20 60:40 B Amount of spread(g/m2） 100 120 140 C Hot-pressing time（min） 3 4 5 D hot-pressing temperature（°C） 100 110 120 Hot-pressing temperature has an obvious impact on TVOC emission.
Therefore, it will decrease the TVOC concentration of veneered wood-based panel to reduce resin content, while little resin content will decline the peeling strength and affect the surface properties of veneered wood-based panel.
Effect of velocity of flow on TVOC emission characters Fig.4 shows the time-dependent curve chart of TVOC concentration of coating under different flowing velocity in environment box. 0.02m/s 0.04m/s TV O C （ ¦ Ìg/ m ）3 The mixture ratio Amount of Hot-pressing Hot-pressing of glue spread time temperature Time(h) Fig.3 Visual analysis diagram of factors Fig.4 Effect of velocity of flow on rule of and indicators affecting trends finishing coat TVOC emission Generally speaking, TVOC emissions from paint abide by indicator law, so we could divide emissions data into two parts to analyze.
Relationship between the Formula and Properties of Coating and VOC [J].

Anyway, FSW technology requires a meticulous understanding of the process and consequent mechanical properties of the welds in order to be used in the production of high performance components.
Many studies conducted on FSW of aluminum alloys show that a number of process parameters can affect the welding conditions and the weld properties [3].
Friction was modeled assuming a shear factor equal to 0.7.
The mechanical properties of the joints can be related to this behavior.
Distribution of the effective strain in the welded area, rotational speed equal to 1000 rpm (a) and 2000 rpm (b) Conclusive Remarks A FEM model for the simulation of the FSW process was set up to analyze how the thermal effects due to the different process parameters may influence the mechanical properties of the joints.

Study Friction Between Wheel and Rail by Using Molecular Dynamics Method Qian Xiao1, a,Ming Mu1, b,Xinjian Zhou1,c,Yuxiang Che1, d 1the Ministry of Education Key Laboratory,carrying tools and equipment,East China Jiaotong University, Nanchang,Jiangxi,330013,P.R.China jxralph@qq.com,muming803@163.com,zhouxj@ecjtu.jx.cn,407318848@qq.com Keywords: Embedded atom method , Molecular dynamics, friction , wheel-rail rolling contact Abstract.Aiming at researching friction process on the influence of train rolling contact properties between the wheel and rail,using the basic principle of Molecular Dynamics Simulation and Embedded Atomic Method theory,study the areas of adhesion within the contact patch area will gradually increase along with the occurrence of the friction process,research the increase process about the areas of adhesion within the contact patch area by means of Molecular Dynamics simulation model and simulation algorithm.For the study of friction on the surface about changes
Introduction Due to the limitations of experimental methods, experimental methods can not only through a thorough understanding of the microstructure of metallic materials, material transformation, mechanical properties and its internal mechanisms.
Fig. 1 Wheel-rail contact model The Process of Molecular Dynamics Simulations Model Duilding.Between wheel and rail, there are the following factors: contact with the surface roughness, normal force size, the nature of surface contamination, the water film, film layer, temperature, relative sliding speed and so on[1].
By these factors affect the friction between wheel and rail rolling contact role, the study process to iron oxide as a molecular dynamic simulation of power ideal material, the molecular layer was40 ×40 ps.Fig.2 shows 3d molecular dynamics model.

A diagram of this micro-mechanical piezoelectric pump is In this figure, a thin film, like as the cantilever mechanism, to drive the inlet and outlet valves, and its stability and dynamic characteristics affect the fluid flow accuracy.
So to understand the micro pump actuation mechanism and exclude the actuation of the adverse factors, to increase the fluid current accuracy of control and precision density, and the other by understanding, of the future of energy design a decrease unstable phenomena institutions to serve the material and reduce processing costs, improve the overall Precision machining technology is this study aim.
An experimental analysis is also used to identify the dynamic properties accuracy.
By using the finite element analysis software ANSYS Workbench, the natural properties, dynamic characteristics of a micro pump can be studied.
(2) The finite element method can be employed to study the natural properties of a micro pump.

The release properties of CH and sirolimus contained PLGA films are shown in Figure 1.
After 15 days incubation, films containing CH had more folds than films containing sirolimus which indicated that films containing CH had worse mechanical properties.
There are two parameters to affect mechanical properties of films.
Which factor plays the dominant role is still unclear from surface morphology observation.
a b Figure 4 Weight loss curves of drug containing films: (a) with drugs; (b) without drugs Conclusions In this study, we prepared PLGA films containing CH or sirolimus to investigate the drug release and degradation properties of films.

Fabrication of functionally graded implants by spark plasma sintering and their properties.
Kawasaki, Effect of spark plasma sintering pressure on the properties of functionally graded implant and its biocompatibility.
Zadra, Influence of the sintering temperature on microstructure and tensile properties of Ti6Al4V produced by Spark Plasma Sintering, Proceedings EuroPM2009 Congress and Exhibition, 12-14 October 2009, Copenhagen (Denmark), ed.
Molinari, Microstructure and mechanical properties of cp-titanium produced by spark plasma sintering, Powder Metallurgy 51(1)(2008)59 [9].
Ducheyne, A parametric study of the factors affecting the fatigue strength of porous coated Ti–6A1–4V implant alloy.