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It is affected by plenty of factors, including above all the quality structure of the belt conveyor, optimal construction, production, and properties of the conveyor belt as such, adequate solution of conveyance route shifting, reasonable maintenance, and quality repairs of conveyor belts.
Conveyor belt Lifetime is affected by plenty of factors: structure of the belt conveyor, construction, production, and properties of the conveyor belt, solution of conveyance route shifting, reasonable maintenance, and repairs of conveyor belts [2,5].
Based on all the facts, it is very difficult to take into consideration all factors that affect the lifetime of the conveyor belt.
There are plenty of factors that affect the overall lifetime, reasons of wearing, as well as duration of individual renewal cycles.
All these factors can be mutually combined and together they may affect lifetime of the conveyor belts.

An Effect of Sands of Different Grades on Structural and Mechanical Properties of Sand Concrete Evgenii Borisiuk1,a and Elizaveta Kochenkova1,b* 1Moscow State University of Civil Engineering, Yaroslavskoe shosse 26, Moscow, 129337, Russia aborisyukea@mgsu.ru, b*liza21@list.ru Keywords: Reduced Voidness, Sand Concrete, Fine Concrete, Composite, Sand for Concrete, Fine Sands, Optimization.
The sands, used in concrete mixes, differ significantly in their coarseness of grading, voidness, apparent density and other characteristics, which largely affects the properties of concrete.
At the same time, there is practically no possibility of evaluating the properties of concrete by any one general characteristic of sand.
Cement to cement contacts have high strength, depend on the cement properties and water-cement ratio (W/C). 2.
As the Eq. (11) shows, the thickness of the sand grains coating and the expansion factor have a linear dependence and are determined by the properties of the sand.

In order to improve the mechanical properties and thermal fatigue behavior of 4Cr5MoSiV1 steel, traditional process must be changed.
Uniform microstructure can be obtained after homogenizing and then the mechanical properties and the impact toughness value can be ultimately improved.
Metallographic cross-section of ((a) 4Cr5MoSiV1H (b) 4Cr5MoSiV1samples after 2000 cycles test Several factors influence the mechanical and thermal fatigue properties.
Strength, toughness and hardness of hot work-tool steel can synthetically affect its thermal fatigue behavior.
Mechanical properties of 4Cr5MoSiV1, 8407s steels.Proceedings of ICETS 2000-ISAM, Beijing, P.R.China, October, 2000, 1275～1280

The steel showed a same mechanical property with that of the same degree of structural strength.
However, it revealed higher structural characteristics such as mechanical, thermal properties than that of the same strength steel in a high temperature.
Thermo-mechanic control process is applied to keep the same mechanical property even if the thickness of the structural steel is over 40 mm.
Mechanical properties in high temperatures of the FR and TMC FR steel are suggested in Table 2.
The next step is that the structural stability such as deflection and a maximum load carrying performance is to be derived from the calculated surface temperatures of the beam step by step using the mechanical properties, expansion coefficients, and boundary conditions [5].

The material mechanical properties, stripping, decontamination rate was tested and characterization.
Finally, the influence factors of copolymerization reaction: the choice of solvent, dosage of initiator, monomer and the dosage was discussed.
This material’s mechanical properties, stripping, decontamination rate were tested and characterizing definition was done.
Finally, the influence factors of copolymerization reaction were discussed, including the choice of solvent, dosage of initiator, monomer and the dosage.
properties of the dry film. from table 3 test results, H system’s strength is greater than I, and the system of the peel strength is lower than I.

In order to control the springback, the factors that influence its intensity must be known and controlled.
The researches show that the springback intensity depends on material properties, process parameters and tools geometry.
Concerning the process parameters and conditions, the most important factors that influence the springback intensity are the blankholder force and friction between tools and blank [8, 9, 10].
The mechanical properties of the used material in the case of FEM simulations are given in Table 2.
The elastic properties of the blank material were the Young’s modulus and Poisson’s ratio.

The results show that the polyurethane concrete also has sufficiently good mechanical properties while it has the characteristic of fast patching.
Orthogonal tests with three elements and three levels were built to analyze these factors fully.
After curing about 5 hours at the temperature of(23±2)℃,the relationship between curing agent dosage and mechanical properties of polyurethane concrete is showed in Fig.2.
Fig.2 Relationship between curing agent dosage and mechanical properties Microstructure of polyurethane concrete.
As a result, polyurethane concrete also has sufficiently good mechanical properties while it has the characteristic of fast patching.

The experimental results showed that the physical and mechanical properties of Nano Zinc Oxide/PP/PLA composites filaments depended on the following factors of the percentage of NZOP, the percentage of maleic anhydride (MAH), the plasma treatment parameters, helium gas flow rate, output power, sample treatment or stationary time and oxygen gas flow rate.
NZOP are effectively a bridge between bulk materials and atomic or molecular structures that the increase in surface area to volume ratio alters mechanical, thermal and catalytic properties of its.
The reported values of all the mechanical properties have been averaged over at least 32 independent measurements. 2.6 Orthogonal test design.
To further investigate the significance of affecting factors, ANOVA was carried out using SAS 8.2 Analyst linear ANOVA and the results are listed in Table4.
Thermal degradation and mechanical properties of PET blends.

Fluctuations in material properties.Different grade pipeline steel plates have different mechanical properties and present significant difference in forming performance, process parameters and forming shape of the parts.
Table 1 shows mechanical properties fluctuations for X70 in the different volume.
So it is a prerequisite to investigate the impact of the mechanical properties on the springback to obtain high-quality qualified pipe.
Experimental factors levels were shown in Table 2.
RBF network can be used to study and deal with the relation between multiple factors and the response variable.

Besides, starch has the expansion character [4] and anti-static properties [5], therefore, it can be used to make plastic foam.
This kind of product can better reduce the risk with anti-static properties.
In order to make the material possess the necessary mechanical property, to realize the coupling between fibers, to make a strong and effective inter-connection of nodes, thus it form a stable trussed structure.
Rj is bigger, which means the factors impact larger.
The primary and secondary factors can be determined.