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In addition to corrosion atmosphere, there is a sliding between the contact surfaces of the connector, which would affect the resistance of the connector contact materials.
The results show that corrosion environment and sliding has a more complex and significant impact on the performance of the contact materials than single-factors, and the tests are closer to the real working environment.
However the porosity on the plating surface can deduce these functions since it provides openings through which atmospheric corrosion can attack the substrate metal and degrade the properties of the coating.
Study shows that the Electrical contact failures are the results of dynamic influence and environmental factors, so the study of the combined effects of the environment and dynamic influence is very necessary.
Feng: Proceedings of the 2nd International Session on Electro-Mechanical Device. (2002) [7] Z.P.

Study of the Wall Slip Effect on Viscous Fluid Micro-extrusion Process Congping Chena, Xiaoyun Wangb, Jieguang Huang College of Mechanical and Power Engineering, China Three Gorges University, Yichang, 443002, China aemail:mechencp@163.com, bemail:acuando@sohu.com Keywords: Wall Slip; CFD; Flow Rate; Fluid Expansibility Abstract.
In micro-scale flow condition, the flow rate and fluid extrusion expansibility are always affected by the wall slip between the fluid and tube wall.
The results showed that wall slip make the fluid resistance and expansibility decrease, and the fluid mass flow rate increase. 1 Introduction With the development of micro-electro-mechanical systems (MEMS), scale-effect on micro-tube fluid flow has been drawn wide attention [1], in which the fluid dynamics are significantly different from macro-flow[2].As the study shows, factors such as wall slip, surface tension, viscous dissipation that are always neglected in macro scale can impact micro-extrusion seriously.
Particularly, wall slip is one of the key factors which would decide the flow behaviors [3] like velocity, flow rate, expansibility etc.
References [1] Sun Daoheng, Gao Junchuan, Du Jiang, Jiang Yiwen, Tao Wei,Wang Lingyun, Advances in fluid dispensing technology for micro-electronics packaging, China Mechanical Engineering.22 (2011) 2513-2519

Polymer solutions due to their chemical and physical properties requires for efficient spinning with different intensity of the charge.
The authors introduced an electric field concentration factor (EFCF).
This factor is defined as a degree of the convergence and divergence of jets to the spinning axis.
This affects the potential distribution, resulting maximum intensity of electric field and therefore the efficiency of the production line.
Simanjuntak, “Finite element method model of the mechanical behavior of Jatropha curcas L. seed under compression loading,” Biosystems Engineering, Vol. 111, No. 4, 2012, pp. 412-421

With the increase of particle size, the maximum damage factors appearing in the particles are: 0.0426, 0.0448, and 0.0507, which tend to increase gradually.
Effect of particle size on properties of SiCp/Al composites and its numerical simulation [D].
Mechanical Properties and Fracture Mechanism of Silicon Carbide Reinforced Aluminum Matrix Composites[J].
Effects of particle shape, content and matrix properties on compressive mechanical behavior of metal matrix composites[J].
Effects of die-pressing pressure and extrusion on the micro structures and mechanical properties of SiC reinforced pure aluminium composites[J].

Factors, such as cutting force, cutting heat, clamping force and internal residual stresses, etc., will generate machining deformation.
The main results of these studies can be classified into two categories: method based on certain material properties and method based on removing part of the material [5-6].
The stresses retrieval utilizes the material to be removed during rough machining, thus it has little affects on machining efficiency.
The grads of stress field and capability of interpolation method are two factors affecting the error.
Secondly, the stresses field with sharp grads is hard to be set as the initial condition because its peak values will reduce abruptly which is an uncertain factor for deformation prediction.

In this paper, the structure and properties of different carbon materials and their free radical/non-free radical activation pathways were systematically described, and the effects of various environmental factors on the degradation of antibiotics by carbon materials/PS system were discussed, in order to provide scientific basis for the development of this technology in the field of degradation of antibiotics.
Factors Affecting the Degradation of Antibiotics by Activated Persulfate from Carbon Materials PS Dosing Quantity.
The dosage of PS is an important factor affecting the degradation effect of antibiotics.
The amount of catalyst is another important factor affecting the degradation effect of antibiotics.
In this paper, the research progress on the degradation of antibiotic pollutants by activated PS with carbon materials is reviewed, including the structure and properties of different carbon materials, activation progress, reaction mechanism, effect and influencing factors of different carbon materials.

Besides Si and Mn, the element Mo and/or Cr and/or Nb that strongly affecting the bainite and martensite transformation should be considered. fa is the formed ferrite fraction. a and b are coefficient, a=5.0, b=-3.0 for bainite transformation and a=8.1,b=-4.4 for martensite according to Liu[5].
Fig 5 Optical microstructure of C-Mn-Si DP steel(using 4% nitric alcohol solution as etchant) Optical microstructure of DP steel is shown in Fig5 and mechanical properties are shown in Tab.2.
Table 2 Mechanical properties of DP steel RP0.2[MPa] Rm[MPa] Rp0.2/Rm A50[%] 180°cold bending 335 595 0.563 30 qualified Conclusions Modeling structure for austenite decomposition and ferrite grain size of economical DP steel produced on CSP line is proposed in present paper.
Modelling effect of hot rolling process variables on microstructure and mechanical properties of low carbon strip steels[J],Ironmaking and steelmaking, Vol.31(2004), p.169
Effects of composition and processing factors on the mechanical properties of as-hot-rolled dual-phase steels,ISIJ, Vol.24(1984),p.113.

Introduction The technique of using cement to improve soft soil properties has been widely applied to the treatment of soft soil foundations [1].
The strength and mechanical properties of cement-soil directly relate to effect of foundation solidification [3].
There are many factors affect the mechanical properties of cement-stabilized soil, such as the cement type, cement grade, cement-mixing ratio, curing time and so on [4-8].
The physical and mechanical properties of coastal soil were presented in Table 1.
Table 1: The physical and mechanical properties of soil water ratio ω (%) Natural unit weight γ (N/m3) Specific gravity Gs Unconfined compression strength Original (KPa) Retempering (KPa) Sensitivity 34.6 14.4 2.73 16.2 4.7 3.45 2.2.

Brittle materials are popularly used as engineering materials for excellent properties.
It could be found that the material properties led to the different surface characteristics of brittle materials.
By the comparisons of surface topographies during the grinding process and the surface roughness after precision grinding between different materials, the mechanism of surface formation for different brittle material were discussed with relation to their mechanical properties.
Moreover, for the ceramic is sintered body, its mechanical properties are better than the other brittle materials.
The surface characteristic of silicified marble was affected by the natural pores.

So analysis indicates corrugated steel culvert spreads the upper load better, the geotechnical grille can reduce the pressure effectively through earth pressure redistribution, and the mechanical property of corrugated steel culvert is better than reinforced concrete slab culvert under high fill embankment.
The vibration string pressure cells that transmit signal through frequency are adopted in this test, they have advantages that long-distance transmission generates small errors and the frequency signal are rarely affected by water and other external factors, the measuring accuracy can be reached 0.0001MPa.
Experimental research on mechanical properties of Corrugated Steel Culvert[D].