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However, in the majority of cases, a loss in mechanical properties like tensile strength and tenacity is observed.
Composites with modified kaolinite organoclay showed the significant improvement of the tensile properties.
This result reflected that the tensile properties of NR/unmodified clay slightly increased with unmodified clay contents.
Thus, these reason may be improved the mechanical and physical properties of the NR composite.
This morphology gives rise to a sensible increase in physical and mechanical properties of the composites.

The viscoelastic properties of geologic body can be represented using Kelvin medium.
These influence factors are usually called as attenuation action of imperfectly elastic media.
Stress waveforms are analyzed using mechanical parameters of medium.
Waveform tends to stability because of the affect of mechanical properties of medium and pulse duration.
Thus properties of frequency spectrum of pulse changed.

The aim of this work was to evaluate the effect on microstructure and mechanical properties (hardness and tensile strength) of two different friction welding techniques used for joining two Al-based metal matrix composites.
One of the main limitation to the widespread use of this class of material is related with their joining, as traditional fusion welding techniques, such as TIG, MIG or laser, generally lead to microstructural defects, thus badly affecting their mechanical properties.
The aim of the present study is to discuss the effect of the FSW and LFW processes on two Al-based particle reinforced MMCs, in terms of microstructural modification and mechanical properties.
Microstructural and mechanical characterisation.
The FSW W6A20A composite showed a joint efficiency (JE), defined as the ratio between the joint and the nominal base material properties, of about 70% with respect to the tensile strength (UTSFSW/UTSBM) and about 60% with respect to the proof strength.

Therefore, a thermo-mechanical model was built in the MSC.MARC Software.
With the continuous improvement requirement of basic transmission parts in all kinds of mechanical equipment, it is very necessary to study the bearing mechanical properties of the gear pair in the process of continuous dynamic engagement.
But there are many factors can affact temperature, such as the way of lubricating, body structure, the working condition and so on.
Mechanical engineering & Automation, 2011, (3):14-16
Mechanical Transmission, 2006, 30(3): 29-31

For decades, the composite materials have been increasingly widely used in aerospace, ship, auto and civil engineering with its excellent mechanical properties[1].
All industries engaged in the national construction in China often come up against the problem that a mature composite material may be in short supply due to the market factor, price or other factors and thus affect the normal operation of the project.
It generally studies the large systems containing complex factors.
It’s feasible to give a qualitative and quantitative evaluation on the properties of the composites with AHP.
In this paper, the gray hierarchical analysis is applied to the relation evaluation of the properties of composites to take an overall consideration of several factors affecting the performance and avoid the subjectivity of the single factor.

The airfoiles of wind turbine blade structure are more perfect and the mechanical properties of materials are significantly improved based on these researches.
Considering Xinjiang's geographical factors, it is obvious that climate change of four seasons and day-and-night temperature difference.
Based on the climatic conditions in Dabancheng, the effect of extreme temperature on the properties of wind turbine blade is studied.
Therefore, the impact of extreme temperatures on blade properties can not been ignored.
In the next 30 years, the temperature factors will become one of the considerations while designing optimization of wind turbine blade under the cold phase phenomena and the hot phase phenomena.

In this study, we studied the properties of friction welding required to produce the aluminum propeller shaft of lightweight rear-wheel-drive vehicle.
Finally, the core factors to get the maximum effect of friction welding investigated.
Al 7075-T6 has certain benefits and good mechanical property.
Al 7075 has high fatigue strength and mechanical property as well.
Yilbas : Investigation into the properties of friction-welded aluminum bars ( A.

Natural enamel has good mechanical properties and high abrasion resistance, their physical properties and physiological function are related to its unique structural composition and morphology[2].
As the anisotropic properties of the enamel and dentin, their mechanical properties withstanding the external load was various [11].
Mechanical properties of tooth structure are sensitive parameters of microscopic structure [10].
These factors increase the ability of cariogenic bacteria to enter dentinal tubules and the opportunity of dental pulp to necrosis.
Mechanical properties of human dental enamel on the nanometer scale[J].

The relationship between the elastic-plastic properties of concrete and its ability to resist the external loads and internal stresses effects arising under the influence of aggressive environmental factors has been studied.
The cement stone and concrete structure is a complex heterogeneous system consisting of solid, liquid and gaseous phases, in the boundary layers of which under external conditions change, the indicated stresses arise, affecting the material durability [5].
Change in concrete composition and consequently, the relationship between the structural components is carried out by various technological factors: the binder type and consumption, the amount and properties of the aggregate, concrete curing conditions, etc. [4].
One of the factors that determine the capillary pressure and tension which occurs at negative temperatures, is the degree of filling the capillaries with water.
Sychev, Chemistry of hardening and formation of strength properties of cement stone, Cement. 9 (1978) 4-6

Stress intensity factors determined by this method are shown in Fig. 4.
This means that at the same stress amplitude TiN inclusions with small stress intensity factors are as harmful as bigger AlCaO inclusions with higher stress intensity factors.
Summary The chemical compositions of non-metallic inclusions affect their mechanical behaviour at cyclic loads.
Oguma: Characteristic S-N properties of high-carbon-chromium-bearing steel under axial loading in long-life fatigue.
Andrews: Stress Fields around Inclusions and Their Relation to Mechanical Properties.