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Various types of gates have differing properties and advantages, but based on the summary analysis of the state of the active gate, there are some common problems. 
For example, by using FRP materials, the weight of the gate could lose 40% of its weight and the durability can be doubled with the same mechanical properties.
This shows that elastic deformation will not affect the performances of FRP gates.
When the optimal factors come to limitation, it is time to consider appropriate increase in thickness.
The structure should be convenient to remove and install, meet the mechanical property requirements, and lower the cost.

The developed compressive stress field is beneficial to improve surface properties such as fatigue, wear, and corrosion.
Various factors that affect the compressive stress of the LSP are tested with a serial experimental using 30CrMnSiNi2A as workpiece.
The pricinpal of LSP Laser-generated shock waves in a confining medium have been used to improve the mechanical properties in the surface region of various metals such as aluminum, steel and copper.
This shock wave is purely mechanical in nature and results in significant changes in the microstructure and properties.
This project selects the high-tensile steel 30CrMnSiNi2 as test specimen to carry on the LSP experiment,and analyzes its hardness, organization, and mechanical properties contrast after the LSP processing to 30CrMnSiNi2A,especially the investigation of compressive residual stress is therefore tremendously significant.

These factors can have serious consequences on the safety, cost, and operational capability.
Empirically designed and assembled, the MFC is poorly understood, especially in terms of its underlying operating principles, its dependence on design parameters and its electrical properties [3].
The aim was to monitor the changes in the electrical properties and voltage responses of the sensor to detect any degradation in the structure or sensor.
Furthermore, the mechanical and electrical properties of MFC materials could be gradually degraded over their service lives [4].
[2] Inman, D and Ruggiero, D., "Composite Materials with Embedded Sensing," Center for Intelligent Material Systems and Structures Department of Mechanical Engineering Virginia Tech, USA, (2007) [3] Lloyd, J, "Electrical Properties of Macro-Fiber Composite Actuators and Sensors," Master Thesis, Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, (2004)

The purpose of the present study is to clarify which characteristics of the fine wire drawing process contribute to these superior mechanical and metallurgical properties.
To determine the origin of the combination of high strength and high ductility, several factors are considered.
It is believed that the physical properties of fine wires are different from those of thicker wires.
As shown in Fig.7, three factors contributed to the drawing stress .
Several factors were proposed as the cause of this phenomenon.

WPC siding would cause aging problems in alternating light and rain environment, which could cause some defects:fading, mechanical properties reducing, and affect appearance and durability finally[4].
In addition, water can aggravate surface fading of WPCs, so fading is caused by different environmental factors.
The effect of UV light and xenon lamp accelerated aging on mechanical properties of recycled milk-cartons/PE composite siding.
There are different study conclusions of the effect of UV light accelerated aging on mechanical properties of WPCs, Lundin [11]pointed out mechanical properties of WPC decreased most in the initial 1000h, while Starket al. thought mechanical properties reduced obviously in the later 1000h.
Effect of accelerated weathering on the physical and mechanical properties of natural-fiber.

In sheet metal forming, the friction between tooling and workpiece is an important factor which affects not only the quality of products but also the service life of tooling.
Factors influencing friction have been investigated in sheet metal forming.
Andrzej[5] investigated the factors influencing friction in sheet metal forming, such as sample orientation, lubricant, velocity of sample displacement, plastic strain and contact pressure.
Azushima[9] extended the research with the analysis of the influence of the die surface properties on the friction coefficient.
The material mechanical properties are shown in table 1.The specimens for the friction tests were prepared as a strip of 500×13mm.

However, their practical applications are limited by their poor surface mechanical properties.
As is well known, rare earth (RE) oxides are effective in grain refinement of many metallic alloys and thus improve the mechanical properties.
It is well known that the final growth morphology of a crystal is controlled by the following factors: (1) crystal structure; (2) thermodynamic properties such as interfacial energy and phase transformation entropy; (3) growth kinetics and mechanism; and (4) thermal and mass transportation in melt.
During solidification, the alloying primitive content C0, the temperature gradient of the liquid phase on solid-liquid interface G and solidification rate R are the chiefly influencing factors on crystal morphology.
[5] Tian Yong-sheng, Chen Chuan-zhong, Wang De-yun, Xu Ying, Lei Ting-quan, Analysis of the growth mechanism of TiC crystal and the mechanical properties of the laser alloyed layer on the surface of pure titanium, Laser Technology. 29 (2005) 113-116 (in Chinese)

In addition, because of own characteristics of rubber material, differences also exist in sizing properties.
Actually, random is shown in the aspect of tire structure and rubber material properties of each tire, which affects radial tires in properties and reliability.
It is an effective numerical analysis method to analyze various structure problems, affected by random factors.
According to it, the main factors, which affect objective function, can be determined.
（a）turn-up height （b）Material Properties of TVE （c）Material Properties of TVPA Fig. 5 Influence of random variables to reliability Fig. 6 Relationships between response SENER and the Reliability.

By the uniqueness theorem of limit,both the theoretical formulae of stress intensity factors and analytic solutions of stress field and displacement field near interface crack tip are deduced.
In addition, the stress intensity factors, stresses and displacements of interfacial crack tip for each material are together affected by two bimaterial elastic constants.
Comparing with paper [4], the different mechanical model is studied in this paper.
By using properties of determinants, the determinant of the coefficrents matrix for each system can be found as (17) in which , (18a) , (18b) are bimaterial engineering parameters.
Putting Eq. 24 into Eq.15, then Eq.15 can be reduced to (30a) (30b) (30c) , (30d) Then the following stress intensity factors can be deduced

The corrugated waist rail has been successfully rolled in the Mill Research Institute of Yanshan University.Based on commercial FE software of DEFORM-3D, the recrystallization in the rolling process of corrugated waist rail was simulated, the factors affect the recrystallization are analyzed.
The different reduces and rolling speed that affect the recrystallization are also analyzed.
It has been already tested that the mechanical properties of this kind of special structure rail are better than those of the ordinary structure rail.
The dynamic properties are also improved[3][4].
China mechanical engineering,2005,16(12):1103-1106 [2]WU Bo, CHANG Fuqing, ZHANG Wenzhi.