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Study on the fatigue life of fully-automatic hydraulic press pull rods based on finite element and mechanical materials Zhicheng huang1, a Baiqing Zhang2, b Han Xu3, c Wen Han4, d 1,2,3 ,4 College of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute Jingdezhen333001, China a, b, c, d Email: huangwu555@sina.com Keywords:　fatigue life fully-automatic hydraulic press pull rod finite element wall and floor tiles mechanical materials Abstract: Fully-automatic hydraulic press is　one of the key mechanical equipments of ceramic wall and floor tiles production line.
The material of the pull rod is 35CrMo alloy structural steel, and its characteristic coefficients and mechanical properties are as follows: mass density: 7800kg/m3; elastic modulus: 2.074e +11 Pa; Poisson's ratio: 0.3; yield limit: 835MPa; limit strength: 980MPa.
Appropriate constraint handling will directly affect the calculation results, so it must be as close as possible to the actual.
Specified and storied the node stress in ANSYS, and then given fatigue cycle number and the scale factor and events reference, input the fatigue cycle and stress intensity data in the table 1, finally, calculating the fatigue life.
Mechanical design and manufacturing,2007

The differences of macroscopic mechanical properties of concretes can be explained using the changes of their pore size distribution.
Introduction Pore structures and their changes of concrete are important factors to influence the mechanical property and durability of concrete.
The results showed in Fig.1 are consistent with the general development trend of mechanical properties of concrete.
This indicates that what affects the macroscopic properties of concrete most is not porosity, but the pore size which leads to the change of porosity.
And results by TPM also can explain the mechanical properties changes of concrete

It is important for design for mechanical, electrical, thermal, chemical et al.
There are several influencing factors in the material selection process, and thus material selection problem is a multi-criteria decision making (MCDM) problem.
Introduction With the rapid development of information technology, material selection problem becomes easier than in the past with the constructed new databases or using existing databases of material properties [1].
Improper selection of materials may result in damage or failure of an assembly and significantly decreases the performance of products, thus negatively affecting productivity, profitability and reputation of enterprises [2, 3].
In this study, the evaluation criteria (influcing factors) are dielectric strength (), volume resistance (), dissipation factor (), dielectric constant (), thermal expansion () and relative cost ().

While, the influencing factors on the forming load are analyzed.
In the train wheel forming process, the geometrical feature and size of the wheel will be deformed, and sufficient plastic deformation will be provided to ensure mechanical properties of the train wheel.
(1)535mm→(H)65mm→48mm (2) 535mm→(H)70mm→48mm Fig.8 Comparison of forging characteristics with different parameters Influence Factors on the Forming Load The finite element method on the analysis of train wheel forging process has been used by both domestic and foreign scholars as a more effective and more economical method [5,6].But many factors will affect the numerical simulation results, for example, the forming load.
Studying these factors and finding out the influence laws could improve the accuracy of the numerical simulation results.
l Many factors affect the numerical simulation results.

The purpose of the study is to compare quantitatively how the physical properties of the different suitable reducing agents will affect the development and design of a process to continuously produce titanium powder from TiCl4 in molten salt.
Design Considerations Some important factors affecting the design and operation of a continuous molten salt mediated titanium production process are: · Volumetric solids concentration · Vapour pressures of components in the reactor · Reducing metal solubility · Rate of reducing metal dissolution · Rate of TiCl4 absorption · Rate of reaction The effect of the choice of reducing metal on these factors is compared below.
In principle, it is (or should be) possible to estimate mass transfer rates from published correlations if the physico-chemical properties of the chemicals in the reactor, the reactor dimensions, and mechanical energy input to agitate the reactor are known.
Unfortunately only some of the physico-chemical properties are known with a reasonable degree of accuracy and the required reactor dimensions and the mechanical energy required to agitate the reactor are yet unknown.
Nevertheless, in spite of all these uncertainties, insight into and understanding of the issues affecting scale-up of the processes can be gained through estimates of the relevant rate processes.

It was also worth trying other metals as matrix material so as to see the differences among mechanical properties.
After these factors had been considered, it was tin that was chosen as the matrix metal owing to its low melting point (232°C) and good fluidity.
Most problems arose in connection with aluminium matrix specimens as its wettability properties are worse than the wettability properties of other metals.
General conclusions are that double composites improve the mechanical properties of products yet, unfortunately, at the same time the moulding parameters become changed too.
Valle et al: On the role of brittle interfacial phases on the mechanical properties of carbon fibre-reinforced Al-based matrix composites, Mater.

Owing to its high mechanical strength, chemical inertness, low frictional coefficient, high wear and corrosion resistance properties and so on, carbon nanotubes (CNTs) films have emerged as a potential material for biomedical applications.
Previously, medical devices were selected based on its material and bulk properties.
However, it is now recognized that the surface properties of the device mainly govern its biomedical applications.
Carbon nanotubes (CNTs) films has emerged as a promising material for biomedical applications in recent years due to its high mechanical strength, chemical inertness, low frictional coefficient, high wear and corrosion resistance properties, high electrical resistivity.
The surface properties of samples were characterized using a water contact angle meter.

Moreover, the factors that affect center tower stiffness are determined.
This will lead to excessive girder deflection, affecting the usability of structure, and tower body to bear shear and bending moment.
With regard to multilane, lateral reduction factor is 0.55.
Four major factors must be considered, they are vertical displacement of girder, horizontal displacement and main cable anti-slides safety coefficient at the top of center tower, along with the maximum bending moment at the root of center tower.
While the maximum bending moment at the root of center tower have a trend of increasing, developing toward a direction that is adverse to structural mechanical property.

Hence, it results in the changes in pavement material properties and variation in the pavement mechanical behaviors, that manifesting in longer loading time, lower modulus of asphalt mixtures, increased structural shear strain, etc., which are not conducive to asphalt pavements for resisting rutting deformation, shoving and other damages.
As the vehicle speed imposes a greater impact on the structural performance of asphalt pavements, its change will affect the loading time and equivalent frequency of vehicle load, thereby affecting the properties of asphalt and asphalt mixtures.
Thus, the impact of vehicle speed on the asphalt pavement properties is most important factor in respect of long sustained slope sections.
Thus, it should comprehensively take those factors into account during the determination of the delimitation criterion of long sustained slopes.
In which, the truck speed is the most important factor affecting the asphalt pavement performance of long sustained slope sections.

Because of the difference between oil and water in physical and chemical properties, research on the design method of water hydraulic slide valve is important to design the water hydraulic servo valve.
The factors which impact the static characteristics of slide valve like the spool opening, flow coefficient, incidence angle have been discussed.
Because of the difference between oil and water in physical and chemical properties, the flow coefficient of valve port using oil as its working medium can't be applied when the working medium is substituted by water.
In order to design an applicable water hydraulic servo valve, it's necessary to study the factors which influence the static characteristics of the slide valve with CFD software Fluent.
At the same time, the mechanical energy converts to the heat energy of fluid, which affects the service life of components. so, reducing the vortexes and turbulent kinetic energy as more as possible is important.