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The carbonation velocity coefficient, related to many factors, embodies the carbonation resistance of concrete.
Study the influencing factors of critical chloride concentration in composite beams.
Wu [8] studied the corrosion situation and mechanical properties of composite beams corroded by sulfate -chloride solution.
Xing: Experimental Studies on Mechanical Properties of Steel-Concrete Composite Beams Corroded by Sulfate, MS., Central South University, China, 2009,p.28
Li: Evaluation and Design of Load-Bearing Properties of Corroded Concrete Members (In Chinese), China Railway Publishing House, China, 2011, p.13

Thus, this paper investigates a relationship among these three factors to determine the setting condition which minimizes the anodizing cycle time.
Roa et al. studied mechanical properties of alumina layers formed in sulfuric acid anodizing under burning conditions [10].
It is obvious that the productivity of an anodizing process can be increased by reducing the anodizing time and adjustment of other related variables to maintain required thickness without affecting burn defect.
[8] Yann Goueffon, Laurent Arurault: Black anodic coatings for space applications: Study of the process parameters, characteristics and mechanical properties, Journal of Materials Processing Technology, Vol.209 (2009), p.5145-5151
Muller: Mechanical Properties at Nanometric Scale of Alumina Layers Formed in Sulfuric Acid Anodizing under Burning Conditions, Ceramics International, Vol. 38 (2012), p.1627–1633.

Surface treatment is accompanied by different physical and chemical factors that affect each other and influence the formed macroscopic properties of work materials.
The role of each separate factor can’t be experimentally investigated.
Researches on the themes have been carried out in various scientific schools, but taking into account the opportunities connected with materials processing with particle fluxes, the problem of using this method for improving properties of work materials is topical.
Using the properties of the materials presented in [4-5], the parametric variation intervals have been calculated: , , , .
(in Russian) [5] Aluminum: properties and physical metallurgy, in: D.E.

In the quenching process, a non-linear thermo-mechanical direct coupled analysis of the aluminum alloy thick plates was carried out, by taking into account of the temperature dependence of the thermo-physical properties.
Quenching process is very complex and affected by many factors.
The curves of material thermal properties such as thermal conductivity, specific heat, thermal expansion coefficient, elastic modulus and the heat transfer coefficient are input by using of the table.
Thus the workpiece rigid body movement is keeping restrictions without affecting the quenching heat distortion and stress distribution.
·The thermo-mechanical direct coupled analysis finite element model of the aluminum alloy thick plates is built in quenching process.

The microstructure and electrical properties of Cu films were investigated as a function of sputtering pressure by X-ray diffraction XRD and Hall effect method.
The electrical properties are also severely influenced by sputtering pressure, the resistivity of the porous Cu film is much larger than that fabricated on Si substrate.
Introduction At present, the electrical properties of Cu film were intensively researched.
The effect of application in electrical properties of thin film is not satisfactory.
Therefore, in order to fulfill the application requirements, electrical properties of porous Cu film still need to be studied on the long-term.

Its role and its susceptibility to the caries process are important factors to keep up its integrity.
Its development can be linked to both, poor oral hygiene, as well as genetic factors.
Also, they evaluated three sort of food with specific mechanical properties: Peanuts (brittle); Coconut (fragmentable and crumbly) and bun (fibrous).
Mechanical Properties for the numerical analysis.
The mechanical properties reported in the table 1 were considered. 3.2 Experimental Dental Model A photoelastic thin layer was prepared.

There are five factors affecting the degree of the equipment modularity are: (1) structure interaction; (2) force interaction; (3) signal interactive; (4) energy interaction; (5) material interaction.
A discrete or continuous membership function for different types of factors needs to be used to get a different membership degree.
In general, the larger the membership degree of these five factors is, the smaller the interaction between the parts is, and the higher the modular degree is.
According to the characteristics of the different equipment, five factors are given the different right values or are determined by the degree of membership.
AHP method can also establish a set of right value when more factors exist. 4.

To accurately calculate the prestress of externally prestressed composite girder bridges, the six critical factors (the prestressing tendon withdrawal and anchor deformation, friction between prestressing tendon and deviator, prestressing tendon relaxation, concrete creep, concrete shrinkage and temperature changes) that cause the prestress loss of such type of the bridges are summarized and the corresponding simplified calculation methods are respectively derived on the basis of the existing researches.
The prestressing tendon’s ability has an important influence on the mechanical behavior of prestressed composite girder bridges, which is the key design parameters.
On the basis of existing research, this paper summarizes the key factors that lead to loss of prestress and derives the corresponding simplified calculation method for design reference.
During the design of prestressed concrete , due to factors affecting the construction , material properties , and environmental conditions, prestress in tendon will gradually decrease, the phenomenon is called prestress loss.
The temperature changes loss As the external tendon is outside the beam cross-section, due to the temperature difference between day and night, seasonal temperature and other environmental factors, the temperature in the use phase is higher than that of tension construction.

In this investigation, some experiments such as hardness, tensile, impact and fatigue tests have been used to study the mechanical properties of the samples surface alloyed by this method.
In other words, because of low diffusion depth of Li in Al, the surface properties increase intensively, while properties which are not associated with the surface characteristics of the base material (Al) are almost constant.
Influenced by initial surface cracks, the fatigue behavior is another mechanical propImpact Energy (J) erty of the material which is intensively affected by surface alloying which makes much more surface hardness.
Conclusions The following conclusions can be drawn from this investigation: 1- Tensile and impact tests prove that like this method, other methods of surface alloying, does not change the mechanical properties not associated with surface characteristics of the material.
For the diffusion time of 24 hours the number of cycles to failure is increased by the factor 4. 3- Surface hardness is another property of the sample which is increased when the diffusion time is increased.

Design of Walking Stepless Speed System for Caterpillar Feeding Combined Harvester Lou Xi-yin Department of Mechanical & Electronic Engineering, Huzhou Vocational Technology College, Huzhou 313000, China Key words: mechanical design; stepless speed system; hydraulic; simple structure Abstract: Hydro mechanical stepless speed system is a new conbination system of hydraulic transmission and mechanical transmission, which realizes the stepless speed change through the hydraulic transmission and the mechanical transmission to reduce the speed and torque, and to improve transmission efficiency; through optimizing design, The system can realize the differential steering, increase ground clearance.
Because the gearbox assembly mounted on the chassis underside, ground clearance is minimal, affected the combine harvester of paddy field through.
At present, the crawler combine rice production at home and abroad, mostly can not adapt to the work in the paddy field mud depth of 200mm, the inferior a series of questions become the factors hindering the development of southern rice combine harvester.
The layout is flexible and convenient, fretting properties, comfortable operation,this system can accurately control the working parts, driving torque output and speed can be independent of the input speed adjusting to a large extent, so that the combine harvester can run in a stable , high efficience, energy saving, and noise reduction condition.
Semi-hydraulic and Semi-mechanical Driving Systems of Caterpillar Combine.