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But in the actual use , with the time of material under stress increases, the performance of materials will be decreasing[7], which will result in affecting movement of the hydraulic cylinder .
In order to achieve the reduction of structural deformation, there are several methods: increasing ribs , changing material properties ,or using them both .
New rib Fig10 Total deformation of supporting beam Fig11 Diagram of internal structure of supporting beam Fig12 Total deformation of supporting beam Fig13 Total deformation of supporting beam It can effectively reduce the deformation by changing the material properties, the following three figure(Figure 14,15,16) is the result of the analysis of the change of material properties. ( material used is 9Cr2Mo )Figure14 shows the maximum deformation of the supporting beam is 0.3707 mm,Fig15 shows the deformation of supporting beam which is welded one more rib is 0.3426mm, Fig16 shows the deformation of supporting beam which is welded two more ribs is 0.3142mm.
On the contrary, the safety factor of the facility will be larger than the analysis results.
Mechanical design and manufacturing(2010) [4] Tiejun Wen，Qin Zen，Zhuying Tang.

However, the function of nanoparticles in a metallic matrix is related to their distribution in the matrix, which can strongly affect the mechanical properties of the composite.
González, Microstructural factors controlling the strength and ductility of particle-reinforced metal-matrix composites, J.
Tjong, Novel nanoparticle-reinforced metal matrix composites with enhanced mechanical properties, Adv.
Song, Characteristics and mechanical properties of magnesium matrix composites reinforced with micron/submicron/nano SiC particles, J.
Gan, Effect of particle size on microstructure and mechanical properties of SiCp/AZ91 magnesium matrix composite, Mater.

Surface mechanical attrition treatment is a pre-stressing process that enhances the lifespan of mechanical parts.
Introduction Titanium and titanium alloys are light metals preferred in many areas due to their positive mechanical and physical properties (high strength, low density, good biocompatibility, low thermal conductivity, etc.).
Mechanical surface treatments such as shot peening (SP), ultrasonic shot peening (USP) are applied to alloys in order to improve these negative properties.
The friction between shot and target was selected as a friction coefficient factor of 0.25.
The mesh size of the area affected by the shot in the target material was chosen as 0.07 mm.

These properties are strongly related to the microstructure obtained during thermo-mechanical processes.
The alpha content is affected by the temperature of deformation and the morphology of the alpha grains is influenced by the strain and strain rate.
The control of the alpha phase (hcp) morphology in wrought alpha + beta titanium alloys is of great importance in achieving desired combinations of static and dynamic mechanical properties.
The shape factor decreases with increasing strain (Fig. 4b), meaning that alpha grains become more elongated by increasing the strain.
Quantitative analysis for deformation at 930°C: a) area distribution and b) shape factor distribution of the alpha grains for different strains.

Because of the excellent properties, HVOF was widely used in aeronautics, astronautics, automobile, textile and paper-making industries.
Table 1 The level table of machining factors Factors Levels Peak current I (A) Pulse on-time Ton(μs) Inter-electrode gapΔ(mm) Rotate speed of workpiece n(rpm) 1 15 60 0.2 75 2 20 200 0.3 160 3 25 300 0.4 265 4 30 400 0.5 375 Table 2 Index: surface roughness Ra (μm) A B C D Ij/4 1.63 1.69 1.46 1.43 IIj/4 1.19 1.01 1.24 1.53 IIIj/4 1.27 1.30 1.10 1.41 IVj/4 1.35 1.43 1.63 1.07 Stage difference 1.42 2.70 2.12 1.84 We can obtain table 2 with data processing.
Thereinto A, B, C, D represent four factors: peak current I, pulse durationTon, inter electrode gap Δ, workpiece rotation speed n.
The greater change range is, the greater effect of the factor on index is.
So we can arrange the factors(A, B, C, D) order according to the influence of these factors on roughness index from high to low: pulse duration(Ton), inter electrode gap(Δ), workpiece rotation speed n(rpm), peak current I.

The DSST can be a potential method for producing a high fraction of αm, which can be thermally decomposed into a fine lamellar α/β, introducing a Ti-6Al-4V alloy with superior mechanical properties.
Thus, the mechanical properties of Ti-6Al-4V alloy with the morphology of αm is predicted to be superior since it has a characteristic combination between high strength of α′ martensite and high toughness of α diffusion.
The small fraction of the αm and the non-linear trend of its fraction must be affected by a factor other than a cooling rate.
However, the effect of these white particles on the mechanical property of Ti-6Al-4V will be explained elsewhere.
Lütjering, Influence of processing on microstructure and mechanical properties of (α+β) titanium alloys, Mater.

Such properties can be obtained using magnetic iron oxide nanoparticles.
The considerable length of the pipelines and rather stringent conditions for their operation require increased attention to the isolation of the surface from the effects of external and internal factors leading to corrosion wear.
Since most composite materials are used in aviation, space technology, and mechanical engineering, great importance is attached to the uniformity of the distribution of properties in the entire volume of parts.
In the solid-state, it is necessary to provide increased mechanical properties.
The use of nanoparticles made it possible to increase mechanical properties and increase mobility and penetration [17-19].

On basis of the model, its epitomized model is formed to analyze the landslide mechanism and damage model by taking them into consideration: water-level fluctuation in reservoir, rainfall intensity, rainfall capacity and soil mass mechanical property, and decide current stability, predict its tendency and potential risks through applying the monitoring data and quantitative analysis.
The rock increase the water content with the rainwater, and at the same time increase the density, thus finally decrease the shear strength, all of the above factors result in landslide[1-3].
Boji stone landslide is in the northeast of Fulin region, and beside the Yangtze River, which belong to the denudation landform, and is affected by the Three Gorges Reservoir and rainfall, so this region has potential risk of landslide.
But the change of water level affects on the leading edge greatly, which are shown in Fig.7.
Trial Study on Factors Analysis and Prediction of Landslide Hazard Triggered By Extreme Heavy Rainfall.

Chemical composition (wt.%) and mechanical properties of the base metals and filler metal.
Since secondary austenite affects corrosion and mechanical properties, its nucleation must be controlled.
The exceptional combination of corrosion and mechanical properties in DSSs, are a consequence of their balanced microstructure.
Different factors affect the microhardness of WM and HAZ such as phase balance, microstructure (morpologhy of A), F and A solid solution hardening, nitrides formation, etc.
The impact of the microstructure formed needs to be investigated, especially with respect to corrosion and mechanical properties.

Compression deformation will cause a micro-spring to buckle, and structural parameters, constraint conditions and structural forms of a micro-spring will affect its critical load and buckling mode.
Several researchers have studied structural forms, properties and detection methods of planar tensile micro-spring [2-4], however, few has researched properties and design methods of compression micro-spring.
Paras Chawla in India Tapaer University has designed a RF micro-mechanical switch [6].
The factors influencing micro-springs' structural stability contain structural parameters, constraints and structural forms.
Although the distance between these two springs constituting the parallel spring L has no effect on spring stiffness, it does affect the spring buckling stability.