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The microwave electromagnetic field helps to improve the damping properties of materials by 19.5% in average with a low impact energy.
With an increase in the impact force energy, the effect of the microwave electromagnetic field is manifested to a less extent; further improvement of the damping properties does not occur.
It happens not only because of the lightning discharges affecting, but also due to the accumulation of static electricity.
The presence of built-in metal LPC structures introduces additional factors affecting the difference in the perception of operational loads by the structures made of PCM from the calculated ones.
Prospective aviation and rocket complexes are highly mobile and used in conditions of hypersonic speeds in the atmosphere and near space, which demands higher mechanical and thermal strength of their structural elements having complex shapes, strongly affecting the distribution of dangerous mechanical and thermal stresses, as well as the perception of impact (dynamic) loads, including impact loads of high-speed solid objects.

Adding crumb rubber increases crack and frost resistance, but it may decrease the mechanical properties of concrete [8].
Chemical and physical properties of cementitious materials.
To determine the physical and mechanical properties, beam samples of 40×40×160 mm were made.
Thus, 15% of crumb rubber and 10% asbestos-cement powder being added, the optimum mechanical properties of the modified concrete are achieved.
All these factors contribute to the compaction of the matrix structure, the reduction in the number and size of pores.

Murase et al. conducted a research on how heat collecting efficiency affects water-yielding [5].
This experiment is conducted in a closed room to reduce the affect to environment, maintaining the indoor temperature at 25℃.
The research on how different medium gas affects the performance of the transient cooling of seawater desalination facility a.
There are many reasons for this situation, in addition to medium gas heat preservation, initial temperature being the main influence factors.
To sum up, in summer, selecting carbon dioxide as medium gas can enhance the properties of system under the condition of plenty sunshine and enough radiation.

Positive effect of the magnetic field on the properties and metal structure at welding many steels is known.
Studies have confirmed the effectiveness of using external electromagnetic impact (EEI) in underwater welding to improve the weld metal mechanical properties.
Such results will lead to a nonuniform level of metal mechanical properties, an increase in local internal stresses and, accordingly, to a decrease in crack resistance, respectively.
This leads to a 2 ... 3 times increase in dislocation hardening in local areas of the structure in places of extended dislocation accumulation and, accordingly, to a nonuniform level of mechanical properties and formation of local internal stresses raisers. 4.
Bernatskyi et al., Effect of the structure on the mechanical properties and cracking resistance of welded joints of low-alloyed high-strength steels, Procedia Structural Integrity. 16 (2019) 89-96

Oil film properties of three oil wedge sliding bearing and its effect to the rotor stability ZHANG Ai Pinga, LIN Sheng Qiangb Northeast Dianli University , China azap@mail.nedu.edu.cn, blsqiang007@126.com, Keywords: Three oil wedge,sliding bearing, rotor stability,oil film properties,CFD Abstract.
After learning three oil wedge oil film properties, it will be more meaningful to study three oil wedge bearing stability witch are effected on the other factors.
By calculating the navier-stokes equations to study oil film pressure characteristics witch can be effective to consider these factors that will be ignored by using Reynolds equation.
Oil is sticky fluid witch has rotating properties so that can't be neglected the eddy current and turbulence.
Only reasonable mesh can do guarantee the simulation result is close to the real oil film properties.

The mechanical properties, the friction coefficient and the wear performance were then studied.
Therefore in this work, the mechanical properties, the friction coefficient and the wear performance of the frictional materials for motorcycle clutch with fly ash replacements of some original substances were studied.
The mechanical and tribological properties were compared to the original product and the composition giving minimum cost with superior or similar properties to the original product was selected to produce the prototypes which were then tested on a dynamometer.
Specimens with fly ash were found to have higher hardness up to a certain amount of fly ash replacement beyond which a decrease in the mechanical properties was found.
These wear particles were found to be very crucial and are one of the main factors affecting the value of the coefficient of frictions of the system.

However, the materials have various mechanical, thermal properties, and varied volume, which produced severe stress concentration.
These above literatures show that the interfacial bonding is very important to the sensing properties and residual stress, which were influenced by various factors.
Thus, due to the mechanical properties' mismatch between embedded sensor and host structure, when loading is applied on the structure along the sensor's longitudinal direction, lateral mechanical response of the structure may induce further local stress on embedded FBG sensor, and hence may induce the interfacial debonding.
Therefore, based on the above analysis, the embedded sensor does not affect the mechanical properties of HFRP.
Upon simulation data analysis, on can conclude that: Due to mechanical properties mismatch between FBG and host structure, particularly their elastic modulus, embedded sensor did experience additional stress field when load was applied along sensor direction; and the more the mismatch exists, the more the additional stress field is induced.

The current research focuses on the matrix gradation asphalt mixture design and optimization of the ratio of cement mortar, but few studies on how the interface affect to semi-flexible pavement materials properties[3] .Semi-flexible pavement material was a combination of organic and inorganic composite materials, the nature of the interface to semi-flexible pavement directly affect its mechanical properties and road performance.
In order to get excellent mechanical properties and pavement performance for semi-flexible pavement material, matrix mix asphalt mixture design was particularly important.Here we used the volume design method of asphalt mixture, by adjusting the rates pass through 4.75mm and 2.36mm these two key sieve [7], designed for the 30% porosity matrix asphalt mixtures, gradation curve shown in Figure 1.
The author studied the semi-flexible interfacial modifier’s shear properties , anti-fatigue properties, low temperature bending properties and dynamic modulus to determine its’ optimal dosage.He used the volume method of asphalt mixture to designe for the 30% porosity matrix asphalt mixtures,then poured cement mortar into it with different mass ratio interfacial modifier, which met the 28d compressive strength of 30MPa with good fluidity (11.87s) ;analysis of interfacial modifier on the shear properties of composite materials, anti-fatigue properties, low temperature bending properties and dynamic modulus results, to determine the optimal dosage of interfacial modifier.
Composite modulus was a method to describe the viscoelastic properties of asphalt mixture.
With the increase of interfacial modifier content, the overall properties of the semi-flexible pavement material were improved, taking economic factors into account, the best content of interface modifier was 0.4 to 0.6%.

betog@fc.unesp.br Keywords: Superconductivity, mechanical spectroscopy, interstitial oxygen, superconducting oxides.
When oxygen is present interstitially, it strongly affects the physical properties of the material.
The oxygen content is a crucial factor to determinate the superconducting and other physical properties in Sm-123 high Tc superconductors.
A mechanical-loss peak was observed and associated to the interstitial oxygen mobility in the basal plane.
The mechanical spectroscopy measurements showed a relaxation peak whose intensity is directly proportional to excess oxygen content.

Introduction Laser beam,electron beam and plasma beam，all being high energy density beam with the properties of high energy density and the strong penetrating, have been widely used in the field of metal surface modification [1].
Using this technique for surface modification on metallic materials can significantly improve the mechanical properties of materials.
Plasma arc surface hardening heat treatment process involves many factors, the operating current, scan speed, nozzle workpiece spacing, nozzle diameter, the working gas flow, electrode shrinkage, electrode shape, electrode and nozzle concentricity and other factors will all affect the results of the surface hardening.
Divide the three factors into three levels, using the orthogonal diagram L9(33), we get orthogonal experimental table and the experimental results that shown in Table 2.
In the Table3, HI means the sub of the test index what corresponding with every factor. i=1,2,3…HR(DR)=max Hi(Di)-min Hi(Di) Factors Indexes Table 3 Orthogonal analysis Operating Current Scanning Speed Workpiece nozzle Spacing (A) (m/min) (mm) The hardness of the Hardened layer H1 H2 H3 HR 2042.3 2167 2280.5 238.2 2279.9 2136.5 2130.4 149.5 2140.1 2282.7 2053 229.7 Depth of the hardened layer D1 H2 D3 DR 0.53 0.65 0.61 0.12 0.73 0.58 0.48 0.25 0.61 0.60 0.58 0.03 the current value affect to the hardened layer.