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Initial demonstration and preliminary data suggest interesting and rich dynamical, nonlinear, and dissipative properties in these micromechanical resonances.
In exploring and engineering new types of nano/microelectromechanical systems (NEMS/MEMS), the unique electrical, mechanical, thermal, and optical properties of a-SiC are very attractive, which combine and add on to the great comparative advantages of low-cost, easier, and CMOS-compatible material processes.
This process creates large aspect ratio (~625:1) membranes that may allow for unique properties that have not been investigated to date.
Figure 5: Measured quality factors (Q’s) of the various resonance modes, as a function of the resonance frequency.
Yang, Structural and electronic properties of low dielectric constant carbon rich amorphous silicon carbide, Diamond & Related Materials 12 (2003) 963-967

Therefore, the mechanical properties were improved due to the enhancement of fibre adhesion properties after treatment.
This treatment improves the mechanical properties of the reinforced composite.
Both treatments lead to partially eliminate the non-cellulosic components which could affect the adhesion properties of the composite.
This could explain the enhancement of the mechanical properties at 90 days.
Djelal et al. reported that a partial inhibition of the cement setting has been noted for sawdust-based mortars which affects the mechanical properties of the composite (Djelal et al., 2020).

Selecting the representative level factors to carry on combination test for the scope of each level factors,depending on the size of the test index to determine the optimal process parameters combination,and according to the result of variance analysis,we can get the influence degree of various factors on the test index.
In this paper,it uses A, B, C, D as impact factors,and the hydrophobic of nanoTiO2(Y) as the test index .
Reaching the level factors as shown in Table 1.
Fig.1 illustrates the join of nanoTiO2 can make significant increase in the compressive strength of man-made stone. when the amount of nanoTiO2 is3%, the compressive strength of artificial marble can be increased to 100 MPa, the method improves reunion phenomenon of nano-particles and advances the mechanical properties of marble materials.
Effect on Compressive Strength of amount of nano-TiO2 The influence of modified nano TiO2 on the properties of the artificial marble is shown in Table 3.

The selection of a particular metal-matrix composite (MMC) and its subsequent application is contingent upon the specific properties demanded for the task at hand, encompassing factors such as strength, thermal conductivity, wear resistance, and corrosion resistance.
Because reinforcing a composite helps to increase factors like strength, stiffness of the composite.
This incorporation of short fibers serves to enhance the mechanical properties of the composite material.
Applications [26 to 29] Factors influencing the selection of natural fibers: Factors like mechanical properties (e.g., tensile strength and stiffness), cost-effectiveness, eco-friendliness, recyclability, and availability of fibers such as flax and hemp influence their selection in reinforcing hybrid polymer composites.
[16] Mechanical Properties of Polymeric Materials by E.

Hexagonal close-packed and lower symmetry metals often exhibit anisotropic mechanical properties because the dominant slip system forbids slip in certain lattice directions.
Likewise, the mechanical properties perpendicular to the rod axis are dominated by the interaction of grains with hard and soft plastic response.
The flattening off of the {0002} strain after applied tension is a consequence of the onset of PY slip affecting <0002> grains.
The EPSC can incorporate twinning as a mode of deformation, although, up to the present, it cannot include up-dating the texture which as we have seen plays a major part in the mechanical properties [10].
Conclusions Measurements of the residual and in-situ strains and the texture of Zr-2 rod by neutron diffraction have lead to an understanding of the factors which govern the mechanical behaviour of the material.

Foamed concrete is a cellular material with numerous pores inside, and these pores size, shape and distribution are significant factors in determining the material characteristics.
In addition to the pore shape and size, the foam stability has an important role on the properties of concrete.
Stable foamed concrete production depends on many factors such as type of foaming agent and the method of preparing the foam.
The content of foam agent has a considerable effect on the properties of fresh and hardened concrete [3].
The rheology of cement slurry is one of the important factor affecting the properties of foamed concrete.

Each type has unique properties, production techniques, and applications [3].
Fig.1 The workflow of production and testing of open-cell foam based on leachable material infiltration Among the most significant factors affecting the mechanical behavior of metal foams are the size as well as the form of cell struts, which form the skeleton of the open foam, and the foam relative density, which is the ratio between the density of the foam and the density of the base metal.
The preliminary physical and mechanical properties are evaluated to validate the system’s capabilities and assure its reliability and repeatability.
Ashby, Cellular solids: structure and properties, 2nd ed.
Zhao, “Effect of pore size and relative density on the mechanical properties of open cell aluminum foams,” Scripta Materialia, vol. 56, no. 2, pp. 169-172, 2007

Several factors of sliding friction model are discussed: surface roughness, mechanical properties and contact load and areas that have strong effect on the friction force.
It has the form: 5,0 5,0 2       =      =Ψ − ∗ RKH E s s c σ πσ σ ω (3) and as can be seen it depends on surface roughness and material properties.
The index, which is equal to ( )( ) 5,0 ' RHE σ , may be regarded as a generalized surface texture parameter, combining both material and topographic properties.
The contact between solids is controlled by two material properties, the plane-stress elastic modulus, and the hardness; and three topographic properties, the surface density of the asperities, the standard deviation of their height distribution, and their mean radius.
The value of micro asperities smoothing is dependent on assembled surfaces treatment, material properties and interference fit.

In this research, four factors were comparatively analyzed so as to obtain the influence of them on ultimate axial tensile bearing capacity of steel-tubes.
These four factors are longitudinal reinforcement length rate, thickness, elastic modulusand circumferential reinforcement ways of CFRP sheets.
Stress/MPa Strain Strain Stress/MPa Fig. 1 Stress-strain Relationship of Steel Fig. 2 Stress-strain Relationship of CFRP Sheets Mechanical Mechanical Properties.
Table 1 and Table 2 below show material mechanical properties of steel and CFRP sheets in this paper.
Table 1 Material Mechanical Properties of Steel Yield Strength/MPa Elastic Modulus/GPa Tensile Strength/MPa Elongation/% 235 206 407.5 26 Table 2 Material Mechanical Properties of CFRP Sheets Tensile Elastic Modulus /GPa Tensile Strength /MPa Elongation/% 242 4223 1.72 Finite Element Models Table 3 shows the geometric parameters of steel tubes.

Introduction Optimal design can improve the mechanical properties of components and obtain the best size of the structure.the structure approximately saving materials 30% through the application of optimal design method, so that optimization of design technology gain people's highly attention.
How to optimize the mechanical components reasonably,its detailed analysis process is shown in figure1.
As the above box template for original model to finite element analysis, and adding material, element properties, boundary conditions,and solution, related graphics obtained as follows fig.2: Fig. 2 the figure of axial stress deformation and radial stress deformation for spindle box Through calculation and processing,we will obtain different conditions (size) model, all data of that will be used as the design constraints for optimal design, and the calculation variables of sensitivity analysis.
Fig. 4 optimized spindle box Conclusions Due to the complex components, more inner reinforcing plates and holes on the box which is not completely symmetrical,so the systematic and regular parameter drive has not setted for all size, which has brought lots of inconvenience during the sensitivity analysis and the optimization. there are also man-made factors, missing design variables leading to the error.
Mar. in chinese [4] Lai Yi-nan, You bin-di, Song Yi-xin, Fuzzy finite element optimization of complicated mechanical struc [J].