Search results

Through the establishment of the shaft lining automatic monitoring system, the mechanical state of shaft can be effectively analyzed and the overall safety can be valuated.
At the same time, the settlement layers affect the additional force on the shaft lining outside surface, which is the main factor causing the fracture of the shaft lining [1-3].
On the other hand, human factors influence is bigger.
Fig. 1 Software system diagram The application of automatic remote shaft lining monitoring system The vertical additional stress is uneven distribution along the depth of the shaft liner of, and it has closely related to the position of the aquifer, thickness, soil properties and precipitation rate, so accurately measure the size of the additional force and the variation law is very difficult.

Introduction Nickel-base superalloys are used in both land and air-based gas turbine engines, due to their superior high temperature mechanical properties.
The distribution of precipitates will evolve with processing or with thermal exposure in the gas turbine engine, resulting in corresponding changes to the alloy mechanical properties.
It is therefore desirable to non-destructively monitor this evolution in the precipitate phase, so that the mechanical properties of gas turbine engine components might also be monitored in the future.
The geometric correction factors used to convert the resistance values to resistivity are described elsewhere [8].
Volume distributions of the g’ phase were fit to the measured SANS intensity by assuming spherical particles and a hard sphere model for the structure factor.

The listed factors are the cause of intensive paraffin crystallization on the walls of equipment during mining, transportation and storage of oil.
Thus, here are presented results of an experimental study of impacts of the chemical nature of the solvent on crystallization/melting processes of paraffin systems in order to create an insulating layer made from paraffin deposits with specified properties.
The subjects of our study were 10% wt. solutions of this ARPD in gas condensate (GC) [3], produced in the Irelyakhskoye oil and gas field and currently used for removal of ARPD, and in n-undecane (n-С11) - as a model of its gasoline fraction, as well as in the their composite solutions with the addition of cyclohexane and p-xylene - for assessment of effects of naphthenic and aromatic components in the composition of GC and n-С11 on properties of crystallized paraffins.
This factor allows us to favor a triple solvent with GC, as its usage does not require fractionation, and, therefore, it will be more profitable.
Crystallization and dissolution temperatures, and Newtonian and non-Newtonian flow properties, Energy&Fuels. 5 (1991) 895-908

Finally results indicate that the most influencing factor over these chemical reactions and CH4 and H2S conversions is reactor temperature.
Carbon black is widely used as filler in elastomers, tires, plastics and paints to modify the mechanical, electrical and optical properties of materials in which it is used [8], [9].As the prices of fossil fuel natural gas resources become important alternatives to replace increasingly exhausted reserves of high quality natural gases for the production of hydrogen and carbon black [2], [10].
Results show that the major factor influencing CH4 and H2S conversions is temperature.
Based on the presented results, the following conclusions may be drawn: The major factor influencing CH4 and H2S conversions is reactor temperature.
Since CH4 conversion occurs at lower temperatures compared with H2S conversion, the reactor temperature is significantly affected by the amount of CH4.

Introduction The market is, nowadays, a scenario where the cost reduction and product quality factors become increasingly important to remaining competitive.
This difference in grain size was primarily due to severe plastic deformation and to the intense, localized, rapid thermal and mechanical loading to which the workpiece material was subjected during the cutting process [11-13].
In Figures 2 and 3 it is possible to evaluate the more influential parameter on grain size growth: while the constant α does not significantly affect the grain size (Figure 2), the exponent m has a stronger influence on the dynamic recrystallization (Figure 3).
“Heat-Affected Zones in Grinding Steel”, Annals of CIRP, Vol. 43(1) (1994) p. 279-282
Microstructure, Composition, Internal Stress, and Corrosion Properties”, Surface Engineering, Vol. 5(3) (1989) p. 229-233

The study method and result have great theoretical and practical value for improving the technical management level and the awareness of oil lubrication properties.
The dielectric constant is one important parameter of oil electrochemical properties.
The oil optical property is affected to a great extent by particle contaminant.
Figure 1 two-stage fusion model During signal processing stage, it processes the original data locally and eliminates the interference factor according to the properties of every sensor and sampling object.
China Mechanical Engineering, Vol.18(2007) , p. 1962-1965 (In Chinese) [4] Wang yang Wu and Wei Zhang.

The evolution of cutting force depends on material properties, machining parameters such as cutting speed, feed and depth of cut.
The cutting force is essentially corresponds to the product of feed, depth of cut and specific cutting pressure and further it depends on cutting tool geometry, cutting conditions, types of cutting tools and properties of workpiece materials [21, 22].
This phenomenon could be attributed from the effect of radius of cutting tool edge in machining and also the interactions between cutting tool edge configuration, machining conditions and the properties of work piece constitute behavior.
The performance factors are calculated with an accuracy of 10-2.
The performance factors are calculated for specific cutting pressure with an accuracy of 10-2.

Furthermore, it was indicated that the steel also presents high fatigue properties and good high-temperature mechanical properties.
In this paper, the strengthening phase, the typical mechanical properties and corrosion resistance properties of the new developed steel were demonstrated and the application prospects and use value of the steel were evaluated comprehensively. 2.
The mechanical properties measurement was carried out in accordance with ASTM E8 and ASTM A370 standard.
Results and discussion 3.1 Mechanical properties Fig. 2 shows the effects of aging temperature on the mechanical properties of steel.
Figure 2 Mechanical properties of USS122 steel, (a) effects of aging temperature on the mechanical properties, (b) the typical relationships between the strength and fracture toughness 3.2 Fatigue property and high-temperature property Fig.3(a) gives the fatigue properties and high temperature tensile properties obtained from the sample with tensile strength of 1960 MPa.

Introduction Diamond has excellent physical properties, such as the most outstanding performances of hardness and strength, high thermal conductivity, broad transparency range, excellent characteristics of semiconductors and chemical inertness in nature, in consequence, diamond has broad application prospect.
At the present stage, the main methods applied in polishing include mechanical polishing, chemical-mechanical polishing, thermo chemical polishing; ion beam polishing, laser polishing and plasma etch polishing.
Such graphitization happened below 1400℃ is virtually affected by oxygen.
Table1 Experiment data Sample Size 8mm×8mm， The Original Roughness Controllable Factor Time [min] 180 Load [kg] 12 Rotate Speed [rpm] 100 Measure Instrument Keyence Digital Microscope VHX-600E Experiment Analysis.
Also the equipment is simpler, by modifying the polishing disk and setting technological parameters on the basis of conditional mechanical polishing equipment to achieve the necessary requirements of the method.

Interpolation Techniques in Computational Particle Tracking Inside a Direct-Injection Diesel Engine Cylinder Lok Bee Seng1,a, Muhammad AhmarZuber1,b, Wan Mohd Faizal Wan Mahmood1,2,c, Zulkhairi Zainol Abidin1,2,d and Zambri Harun1,2,e 1Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia 2Centre for Automotive Research, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia abichen1989@hotmail.com, bahmarzuber@yahoo.com, cwmfaizal@eng.ukm.my, dzza@eng.ukm.my, ezambri@eng.ukm.my Keywords: Soot, particle tracking, interpolation, trilinear, radial basis function.
Movement of soot particles are examined through the selection factors of particle's initial coordinate (r,Ɵ,z) and soot concentration level at different instant crack angle.
It has been used widely nowadays in automotive field since it has a better fuel efficiency property compared to gasoline engine but it has drawback such as the formation of soot and other pollutants [1].
It happens since interpolation technique computes its result which is affected by the parameter value on the previous time-step where RBF and trilinear interpolation takes on the different value on the related parameter.
By knowing the properties and movement tendency of soot particles, solution to minimize or even control the tendency of soot particles to stick on cylinder wall will have a higher successful probability.