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After a detailed analysis of the materials used in idlers technologies, we considered that their properties could be improved if we cover them with thin layers but with high properties.
We want to improve the idlers mechanical properties and the materials selection for the substrates was made after documentation in specialty literature, standards and manufacturers catalogues.
The deposition parameters are variable [3], and influences the quality of the coatings and mechanical properties as well.
Appropriate sensors and design solutions have to be adopted to observe the main affecting parameters of fretting.
Barca., Gears materials analysis in order to establish the mechanical properties, Bulletin of the Pollitechnic Institute of Iasi, Romania., (2010)

And the effects of these factors on its performance were tested from the cubes with side length of 70.7mm which had been cured in 80±2ºC hot water for 48 h.
Water is one of the most essential requirements to the hydration reaction of cement, and water- binder ratio is a key index which reflects the density of cement-based materials, it’s also one of the most important factors that affects the mechanical and construction performance of grouts.
Research on the Properties of Modified Cement Based Grouting Material Based on DSP Principle.
Influence of Curing Condition on the Properties of Concrete at Early Ages.
Research on the Comprehensive Properties of Early-strength and High-strength Grouting materials Based on DSP Principle.

These factors significantly reduce their service life, which forces to costly repair work.
In the present study, the authors proposed a combined technology of applying coatings by the method of “cold” gas-dynamic spraying followed by surface treatment with a laser beam, which leads to an increase in the operational properties of coatings.
As shown by previous studies, the substrate material does not significantly affect the physicochemical properties of coatings formed by cold spray method, therefore, the coating was formed on economical steel St3.
Here there is a deep heat-affected zone, and the laser beam tracks are clearly visible.
Yurkov, Structure and properties of the bronze-based functional coating obtained by gas-dynamic and microplasma spraying.

Through analyzing Dabaoliang geological characteristics, this paper discussed the factors of the mechanism of landslide in Dabaoliang area and simulated its evolutionary process.
The heavy rain is one of the main factors caused the slope unstable and sliding.
Many factors could lead to the landslide body unstable.
The rainfall is one of the most important factors[1-3].
Due to its relatively poorer shale mechanical properties and weathering resistance, forming weak belt, soft interlayer, and even more sliding surface.

In this experiment, every error factor is independent, so ρij =0. m is the total number of the error factors.
(5) The error of elastic modulus The standard mechanical properties of the material were tested 10 times in the universal testing machine.
In Fig 1(a) the uncertainties from three experimental error factors were compared.
In experiment process, the errors, which affect test precision, from the data acquisition, machining stress, physical properties and experiment reiteration could make a deviation appear in results.
What these errors affect is the accuracy.

It proves that steering wheel shimmy is a vibration of stable limit cycle occurring after Hopf bifurcation, which is elaborated by nonlinear dynamics theory, and the control objectives of shimmy are proposed according to its bifurcation properties.
If the shimmy system is linear, it loses its stability to be infinite divergent movement, in fact, vehicle system can not have such movement, so for the study of shimmy, the system nonlinear factors must be fully considered.
Because the influence factors of shimmy is very much, that causes the shimmy equation dimension may be very high.
By the kinematic properties of limit cycles, it can be concluded as follows: the shape, amplitude, frequency and other characteristics of the limit cycle are determined by the law of motion of the system and are not affected by the initial state or disturbances, which just shows that oscillation frequency is determined, which is not affected by the traffic impact.
The tire gramary equation is used in the model, in which nonlinear factors between cornering angle and cornering force are all considered.

Alloys displaying exceptional properties are subjected to complex interactions between microstructure and processing requirements, which can be described in terms of evolutionary principles.
Such designed alloys become feasible for fabrication by tailoring their microstructure employing thermodynamic and kinetic principles, while fracture toughness properties can be controlled via performing quantum mechanical cohesion energy computations.
The presence of δ-ferrite in maraging steels can lead to inferior mechanical and corrosion resistant properties [5].
Although the precipitation strengthening factors are lower than those displayed by the A and B series (figure 2), the new alloys 1D-3D still show improved strength over their existing counterparts.
The first two factors may be tailored via computing the dispersion geometry (including average particle size and volume fraction) of precipitates formed at higher temperature.

Patel and Bader Al Khayyat pointed out that the surface wettability was one of the important factors affecting the bonding quality of the interface and the improvement of surface hydrophilic property which could improve the bonding strength [14, 15].
Fig. 5 Wettability reversal properties of four systems.
Ali, Factors affecting the performance of enzyme breakers for removal of xantan-based filter-cakes.
Ikeh, Effect of cment contamination on some properties of drilling mud.
Eoff, Surfactants: additives to improve the performance properties of cements.

are respectively the axial pressure distribution factors of the concrete and the steel.
Table3 Design value of axial compression factor for steel reinforced high strength concrete columns Concrete strength Volumetric stirrup ratio Anti-seismic level Level I Leve II Level III C60-C70 0.6 0.7 0.8 Conclusions The following conclusions are reached through pilot studies and analysis of relevant data: Axial compression ratio is an important factor affecting the ductility of reinforced concrete columns and steel reinforced concrete columns.
Axial compression ratio and volumetric stirrup ratio are two important parameters affecting the anti-seismic performance of steel reinforced concrete column.
The limit value of axial compression ratio of steel reinforced concrete columns should be determined by comprehensively considering the steel forms, the stirrup ratio, the shear span ratio and other factors.
Experimental Study on Mechanical Properties of Short Columns at T-Shaped Cross-Section of Steel Reinforced Concrete [J] Civil Engineering Journal, 2007, 40 (1):1-5.

Introduction Ti3AlC2 promoted comprehensive research activities because of its extraordinary mechanical, physical and chemical related properties.
Generally, residual stresses aggravate the possibility of structural components fracture, thereby, affect the mechanical behavior of the joints.
The residual silicon layer may deteriorate the mechanical properties of the joints, especially at high temperatures.
Increasing bonding temperature or holding time caused the microstructure of base material coarsening, which also deteriorate the mechanical properties of the joints.
So the interlayer thickness and bonding parameters are sensitive factors and should be determined appropriately.