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Its design covers mechanical analysis, model geometry, material properties, and many other factors.
When two polyhedron become homeomorphism contain many property that will explain in the latter case in detail.
Therefore the sensitivity also affected by the air damping which with the system is proportional to the surface area for air.
As the main connection is suspension, the knots become the main factors that affect the movements of various parts and subsystems.
The blank can be a circle or square or others that the shape of the blank will affect the subsequent design.

Ultrafine-grained materials show superior mechanical properties in terms of strength and ductility compared to conventionally grained (CG) materials, which makes them especially interesting for light weight construction in the automobile industry due the high specific strength and the high potential for cost reduction [3, 4].
Friction stir welding is found to be a desirable joining technique for UFG materials, since it provides excellent mechanical properties and retains the fine grained microstructure [11, 12, 13].
Four different areas can usually be differentiated after FSW: the base material, the heat affected zone (HAZ), the thermo-mechanically-affected-zone (TMAZ) and the nugget, affected by the mechanical movement of the pin and the temperature increase.
It increases by a factor of two from the as-received CG state to the UFG state after 8 ARB cycles (Fig. 2 b).
Generally, the FSW AA1050 Al sheets in the UFG state show no significant degradation of the mechanical properties in comparison to the as-received state, while the accumulative roll bonded and friction stir welded Al alloy AA6016 shows a considerable increase in the maximum burst pressure as well as the maximum von Mises equivalent strain with increasing number of ARB cycles.

Based on this, this paper will take cement concrete pavement as studying object, proceeding with the analysis of the factors which affect the concrete pavement structure.
As we all know, the pavement structure design should come down to the values of a lot of parameter and the choice of mechanical model.
Therefore, the external condition is also uncertain; second, the design theory and mechanical model has deviation with the actual use conditions.
The second chapter analysis of this paper shows: the generalized resistance of cement concrete pavement is connected with the pavement layer generalized geometric properties and material properties and failure criteria.
The pavement geometric properties and material properties are randomness, while the defined criteria of concrete pavement failure has fuzziness, so the generalized resistance of concrete pavement structure has both randomness and fuzziness; The cement concrete pavement generalized load effect has fuzziness randomness too.

Hygrothermal conditions are well known to affect both the microstructure and mechanical properties of composite materials.
Epoxy specimens experienced a general decrease in mechanical properties.
It was also evidenced that seawater immersion decreased the interfacial properties of the composites more significantly that dematerialized water immersion [7].Ultimate tensile strength, which is a fiber-dominated property, was also found to degrade after exposure to hydrothermal conditions [8].
The diffusion characteristics of moisture in PMCs are susceptible to the influence of such factors as hydrothermal conditions, constituents of materials, etc.
Standard Testing Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials (2010) ASTM International.

The mechanical properties of samples second sub-temperature quenched are better than that of conventional samples 830 once quenched.
This paper is practically significant for the new treatment process and improvement in mechanical properties of 65Mn steel.
It can be seen that the mechanical properties of 830°C+790°C twice quenched are better than that of samples 830°C once quenched.
Austenite inverse transformation sub-temperature quenching can improve the mechanical properties of 65Mn steel.
Mechanical Properties of 27SiMn Steel After Critical Temperature Quenching and High Temperature Tempering [J].

This discontinuity will affect the internal electric field and the carrier collection and result in a poor open circuit voltage and fill factor [6-7].
Table 1 The deposition conditions and the optical properties of the amorphous silicon solar cells.
Layer p b i n Deposition Condition Pressure (Pa) 90 90 90 60 Power (W) 10 10 15 10 Temperature (°C) 200 200 200 200 E/S (mm) 20 20 30 25 SiH4 (sccm) 40 - 40 40 H2 (sccm) 80 160 80 C2H2 (sccm) 1 - - B2H6 (sccm) 5 - - PH3 (sccm) - - 5 Thickness (nm) 8 6 300 20 Optical properties Eg (eV) 2.07 - 1.79 1.61 α400 nm (cm-1) 141231 146648 499459 α600 nm (cm-1) 15038 50061 84081 Fig. 1.
Results and Discussion Fig. 2 show the optical properties of a-SiC:H buffer layers with different C2H2 gas flow rate.
Conclusions The energy band gap and absorption coefficient were affected by the carbon concentration.

The improved properties of the nano-structured metals open up perspectives for their application in innovative industries such as aerospace, surface transport and biomedical implant manufacturing.
Introduction Lightness of materials can be defined in two basic ways: (a) in absolute terms by material densities and (b) in relative terms using so called specific properties.
In particular, Young's modulus and the yield strength are used as properties of interest and, accordingly, light materials can be ranked based on the ratio of modulus or strength to their density.
Among other factors, the effect of grain refinement down to nanometres has been examined in a number of metals and alloys [1-5].
The Hall-Petch equation is one of the most important empirical relationships describing the influence of microstructure on the mechanical properties of metals and predicts a linear dependence of the yield strength/hardness on the inverse square root of the average grain size, 1/(d) 1/2.

The thermal effect during the welding process can unacceptably deteriorate the mechanical properties of the material.
It is proposed to use preheating and heat treatment to obtain a joint with required mechanical properties.
Mechanical properties were evaluated by static tension and free bending test.
Baudin, Microstructural Evolutions and Mechanical Properties of Drawn Medium Carbon Steel Wire, International Journal of Engineering Research in Africa, 41, pp. 1-7 (2019).
Brahami, Effect of Heat Treatment Parameters on Mechanical Properties of Medium Carbon Steel, Mechanics and Mechanical Engineering, 22 (4), pp. 909-918 (2018)

A880 high pressure 13 stage blades in a type of 125[MW] turbine retrofit project adopts steel X22CrMoV12-1-5(call it X22 in brief), and its mechanical properties are shown in Table 1, and chemical composition is shown in Table 2.
Table 1 Mechanical properties of X22CrMoV12-1-5 material σb [Mpa] σ0.2 [Mpa] δs [%] Ψ [%] A kv [J] HB X22 796-811 943-950 16-17.4 49.7 22 295 Table 2 Chemical composition of X22CrMoV12-1-5 material C Si Mn S P Cr Ni Mo V Fe X22 0.21 0.11 0.61 0.002 0.014 11.65 0.69 0.99 0.31 Bal.
Single factor test is adopted to measure the cutting force.
Fx is cutting component of feed direction and mostly affected by the rotational speed of the spindle.
Fy is rarely not affected by the influence of variation of cutting parameters.

The result showed that retardation effect caused by overload would be affected significantly by stress rations.
The mechanical properties of the test material, TA2, are given in Tables 1.
This material is widely used in China to construct pressure vessels because it has good processing properties and mechanical properties.
TABLE1 MECHANICAL PROPERTIES OF THE MATERIAL Mechanical properties Yield strength[MPa] strengsststrengtstrength S Ultimate strength[MPa] MPa Elongation 417 578 64 In order to investigate the effects of the overload on the crack propagation, specimens are divided into two groups.
In this study, as the notched crack is inclined, both Mode I stress intensity factor and Mode II stress intensity factor are a function of the angle as shown in Fig. 1.