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Therefore, in order to enhance the pertinence of tubing string wear reduction design in 3H gas wells, the influences of contact load, friction frequency, and reciprocating stroke on the wear characteristic of tubing was investigated by reciprocating wear experiment and find out the optimal combination of factors and determine the significant sequence of factors affecting the wear characteristic of tubing string. 2.
The chemical composition and mechanical properties of 13Cr-L80 are presented in Table 1.
Chemical composition and mechanical properties of test materials Material Chemical composition（wt%） 13Cr-L80 C Si Mn P S Cr Mo Ni Ti Als 0.22 0.48 0.53 0.02 0.01 12.8 2.16 0.04 0.05 0.02 Comple-tion fluid Water, 0.2%(NaOH), 0.3%(PF-OSY), 3%(JLB Corrosion inhibitor) and K4P2O7 (Aggravating to make the density as1.4g/cm3) 3.
Advances in Mechanical Engineering. 8(7), 1-15
Friction and wear properties of CT80 tubing under low friction velocity.

Experimental data have demonstrated that the geometry and number of turns of the coil would affect the performance of the energy harvester while excitation frequency as a non-physical factor also contributes to its effectiveness.
In order to achieve a high volume figure of merit FoMv and focusing on electromagnetic mechanism, there are several factors need to be considered.
The geometry, strength of the magnetic field, number of turns of the coil and the arrangement of the magnets are among the key factors that contribute to the performance of the energy harvester [10].
F=kti Eq. 10 where F is the force, kt is the transduction factor and 𝑖 is the current.
Conclusion Experimental data have demonstrated that the geometry and number of turns of the coil would affect the performance of the energy harvester while excitation frequency as a non-physical factor also contribute to its effectiveness.

Research on Influence of Ion-Assisted Deposition to the Optical and Mechanical Properties of SiO2 Film Duoshu Wang1,a, Chongtai Luo1, Tao Chen 1, Yuqing Xiong1, Jizhou Wang1 1 National Key Laboratory of Science and Technology on Surface Engineering, Lanzhou Institute of Physics, P.O.
The result shows that the ion energy, substrate temperature and evaporating rate are key factors that affect the abrasion resistance and transmission of the SiO2 film.
The combination character of these films with substrate is affected severely by depositing process and this lead to a limitation to these hard films in many application areas.
So, three experiments were carried out to study the character of SiO2 film affected by the three parameters.
The absorption can affect the application of SiO2 film seriously.

Study on Support Properties of Axial Maglev Blood Pump Huanchun Wu a, Ziyan Wang b, Yefa Hu c School of Mechanical and Electronic Engineering, Wuhan University of Technology, China a whc@whut.edu.cn, b huanchen_1987@yeah.net, c huyefa@whut.edu.cn Keywords: Maglev, Axial Flow, Blood Pump, Support Properties Abstract.
Based on finite element method, magnetic flux of axial magnetic bearing, radial magnetic bearing and test rig are analyzed; at the same time, the structure parameters and mechanical properties and the coupling of radial MB and axial MB are studied.
The results show that: rotor displacement of axial bearing and radial bearing will affect load capacity and stiffness.
However, the bearing properties of the maglev heart pump is not clear, which has limited its applications.
Magnetic Field Analyses Because of the exists of non-linear magnetic permeability, magnetic saturation, magnetic flux leakage, magnetic coupling, eddy current and other factors, the electromagnetic field of magnetic bearings has a strong non-linear and dynamic characteristics.

Recycling waste concrete into new concrete will substantially affect the concrete situation in terms of load capacity and durability [11].
There are a few factors that are being considered when using waste concrete to replace a cement’s content in a new concrete.
Factors influencing the compressive strength of fly ash-based geopolymer concrete.
Wang, Mechanical properties of foamed concrete exposed to high temperatures.
Wang, Elevated-Temperature Thermal Properties of Lightweight Foamed Concrete.

In the mechanical structure supporting stage to achieve the rigid support, the piston rod of the hydraulic cylinder is not affected by force.
Supporting Stage of the Mechanical Structure and Forces.
To determine the safety factor, various factors should generally be considered; the factors include the material, the bearer mode, accuracy while simplifying the model, working conditions and its importance and so on.
The relatively simple algorithm is to take the product of the coefficient of three parts; the safety factor can be calculated through the formulation below: [4] (2) Where n1 is material considered reliable (the uniformity of the mechanical properties, internal defects, etc.); forging or rolling parts of manufactured parts, n1 = 1.05 ~ 1.10.
The rigid support structure is checked by finite element analysis software ANSYS, the mechanical properties meet the requirements.

Mechanical Properties The flux has been manufactured in accordance with the ingredient of No.8.
The tests of mechanical properties have been conducted according to ASTM standards.
The mechanical properties satisfied the Specifications for West to East Pipeline Project of China.
(2) Mechanical tests show that the toughness and other mechanical properties of SAW joints satisfy the technical specifications of West to East Pipeline Project in China.
A reappraisal of the relationship between flux basicity and mechanical properties in submerged-arc welding.

Warpage is an important factor affecting on product quality.
Liao et al. [4] indicated that the optimal process conditions were different for the shrinkage and the warpage because during the injection process, the mechanisms affecting shrinkage or warpage were different.
In order to determine the influence and relative importance of the factors, ANOVA was performed.
The contribution of each factor to the warpge and volumetric shrinkage of control factors can be determined by performing analysis of variance (ANOVA) based on Eqs. (4) - (7).
However, most previous researches on warpage concluded that the packing pressure as the most significant parameter [13, 20], which probably due to different material properties and geometry effect.

A feasible combination of free-cutting additives should yield a stainless steel product with acceptable machining and mechanical properties.
The results of the comparative evaluation of the metallurgical properties, mechanical properties and machinability of this free machining steel with the performance of the existing austenitic stainless steel were described.
Specimens cut from the bars were examined as to the metallurgical properties, machinability and mechanical properties.
And as the same time, the mechanical properties of the free cutting austenitic stainless steel are still approached those of the conventional austenitic stainless steel.
A feasible combination of free-cutting additives should yield a stainless steel product with acceptable machining and mechanical properties.

Kfs is a critical hydraulic property affecting water flow and solute transport in soil [1,2].
However, in spite of the apparent importance that the variation and influence factors of hydraulic property has in ecosystem functioning, a few studies have described the changes of Kfs along types of sand dunes, and their relationship with soil properties in the Horqin Sand Land of north China.
(b) Is there a better concordance between Kfs and soil properties?
(c) What are the key factors to influence Kfs in sand dunes?
Results and discussion Soil physical and chemical properties The soil mechanical composition is not only the foundation of soil texture classification and naming, but also an important indicator for evaluating the basic properties of soil, such as tightness, porosity.