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However, the properties achieved are dependent on several process parameters.
By using LLHT, it is possible to tailor mechanical properties locally, e.g. to produce softened or hardened ultrafine grained (UFG) areas for subsequent forming [3-5].
Laser radiation is absorbed on the surface of the sheet, causing temperature gradient through the cross-section and leading to non-homogenous mechanical properties [1].
In thermographic camera measurements the emissivity factor is depended on surface properties of the sheet, but also on temperature.
The laser light absorption into a material depends on several factors, such as temperature and surface finish, and varies between 40-80%.

It is effective in investigating the effects of multiple factors on performance to determine which factor has more influence [4].
Oktem [7] identified the significant factors affecting surface roughness by using analysis of variance (ANOVA) and the optimal cutting combination was determined by seeking the best surface roughness when end milling aluminum. 
Its chemical composition and mechanical properties were listed in Table 1 and Table 2, respectively.
Results indicate that three factors influencing the surface roughness show the following order as: cutting speed, feed per tooth and axis depth of cut.
The main effects of the three factors on the surface roughness are given in Fig. 4.

To the aircraft structures system, there are lots of factors which will lead to the inevitable performance degradation or faults, such as the corrosion of the external environment, the fatigue causing by the varying loads, degradation of material properties and so on.
Once a structure is damaged or failed, the mechanical parameter would be changed, and the modal parameters of the system be changed as well.
During the flight test, environmental factors could be considered as excitations.
Although these factors could not be measured directly, the randomness and large amount of response data will make these environmental loads good excitations in identifying the modal parameters.
Material Properties Property Skin Spar Spar Cap Material LY-2024 LY-12 30CrMn Density∕kg·m-3 2800 2800 7750 Molulus∕Pa 7.1×1010 7.1×1010 2×1011 Passion ratio 0.33 0.33 0.3 After the modal analysis of wing structure using FEA method, the first seven frequencies and vibration mode was obtained as the comparison value.

Other than magnetic particles surfactants (suspending agents, thixotropes), anticorrosion additives are important factors that affect the rheological properties, stability and redispersibility of the MR fluid [6,7].
On the basis of the stability tests were selected several fluids with the best properties for the study of magnetic field influence on the rheological properties of these sets.
Experimental fluid contains also surfactants: stearic acid ester and polyethylene glycol (PEG)Surfactants are important factors that affect the rheological properties and redispersibility of MR fluid.
The rheological properties of controllable fluids depend on concentration and density of particles, particle size and shape distribution, and properties of carrier liquid, additional additives, applied field.
The interdependency of all factors is very complex, yet is important in establishing methodologies to optimize the performance of these fluids for particular application.

Hard coatings applied by the Physical Vapor Deposition method often provide very good mechanical properties, especially when applied to metal parts that are mentioned to withstand certain level of wear.
The model prepared in this way was modified using selected mechanical material properties to simulate not only the porosity of the material, but also the existence of a hard coating on the surface in the form of TiN on base material is in Fig 2.
This slope then also indicates the variance of the properties of the samples with respect to contact-fatigue resistance.
The steeper the curve, the smaller the variance of the sample properties is achieved and thus the more accurate the result.
It has been assumed that the factors that affect the resistance of the material to contact fatigue cannot be simply specified on the basic properties of the material, such as hardness or surface quality in terms of roughness.

Water uptake and its effect on mechanical properties have been evaluated.
The -NCO groups of PU react further with the hydroxyl groups of starch which enhances the chemical cross linking [7], leading to a change in morphology which affects the mechanical properties.
It can significantly alter some of the properties such as physico-mechanical and electrical properties.
The calculated mechanical properties for water aged samples are given in Table 2.
After water ageing the reduction in mechanical properties of the composites were noticed.

The aim of the work is to study the influence of technological factors on silicate granules formation with a stable porous structure and a bulk density of no more than 300 kg/m3 from liquid glass compositions.
To improve technological properties of the molding mixture, sodium salts were introduced.
Expediency of using combined fillers, made up of materials, directly affecting technological properties of the compositions has been established.
Liu, Thermal conductivity and mechanical properties of porous concrete materials, Materials Letters. 209 (2017) 349 – 352
He, Effect of foaming agent on physical and mechanical properties of alkali-activated slag foamed concrete, Construction and Building Materials. 226 (2019) 280 − 287.

Mechanical properties of as-extruded material were examined using compression test at 293-873K.
However, the effect of enhanced mechanical properties of RS material is observed only at low deformation temperatures.
Those factors are known to be beneficial for the materials, which are awaited to demonstrate a high thermal stability of their properties at elevated temperatures [6, 10].
Vojtěch et al. [6], Mitra [10] that high temperature treatment of Al-Cr [6] and Al-Fe-V-Si [10] alloys does not affect mechanical properties, which is related to high thermal stability of aluminide dispersoids morphology.
Sugamata, Microstructure and mechanical properties of rapidly solidified Al-Fe-Ni-Mg alloys, Mat.

Foreword Wear-resisting coating prepared by supersonic plasma spraying has excellent mechanical property, friction and wear property, anti-oxidation and corrosion-resistance, so wide attention and application are received, and there are many researches about it to be reported[1-3].
Experimental results and analysis The influence of texturing diamond cross track on friction and wear properties As shown in figure 2, the curve indicates the influence of diamond texturing on the coating’s fiction coefficient.
The analysis of coating’s tribological properties Due to laser remelting, the coating’s microstructure is uniform, hardness is higher, roughness is lower, pores are reduced obviously, and adhesive force is enhanced to base material.
From table 3 it can be seen that all texturing properties are improved in different degrees.
Lubrication Engineering, 2008, 33(7): 28 – 31 [7] Qifei Song, Hong Zhou, Yue Li, Lei Wang, Friction and Wear Properties of Cast-iron Material with Bionic Non-smooth Surface under Normal Temperature[J].

Ethyl cellulose(EC) has been widely used as hydrophobic wall materials for extended drug release application due to its prominent properties of good chemical stability, film forming, biodegradability [2].
Several methods of fabricating drug-loaded EC microcapsules, including coacervation [3], spray drying [4], and oil-in-water emulsion (solvent evaporation method) [5] have been investigated, and the factors affecting the drug release profiles have been studied.
The size and morphology, synthesized by solvent evaporation method, can be affected by numerous parameters.
It was noted that the core to shell ratio (mass ratio) was generally a factor of crucial important influencing the size and morphology of microcapsule.
Therefore, it is very important to prepare microcapsules with appropriate mechanical properties and wall thickness.