Search results

It was found that structural properties distribution of a non-uniform blade affected its dynamic response [5].
The employed trial functions were the exact mode shapes for a uniform blade with the integrated average properties [3].
By performing dimensional analysis on all factors, two dimensionless numbers are obtained.
It should be noted that the blade dynamic response is affected by the nature of the blade properties distribution as can be seen in the difference between the uniform and non-uniform blade plots in Fig. 3.
Fig. 2 Blade properties distribution.

The purpose of this study was to evaluate the TiO2 nanotubes growth and the variation in its diameter to improve the surface properties of Ti-7.5Mo to use for biomedical applications.
Introduction Titanium (Ti) and its alloys are widely used in dental and orthopedic applications due light weight and appropriate mechanical properties.
The surface properties of materials are a very important factor to occur a good osseointegration and the topography and surface physicochemistry are elements that enhance the development of the bone around an implant [2].
This alloy was choosen due to theirs excellent bulk properties, a low elastic modulus and a high strength/modulus ratio in order to obtain a better surface.
Surface wettability (hydrophobicity/hydrophilicity) is one of the most important parameters affecting the biological response of an implanted biomaterial.

Results and findings published recently indicate that upon treatment with this technology, the fatigue resistance of the material can either decline or increase, even considerably, depending on numerous base material characteristics, laser hardening parameters and other factors.
At such values, metastable microstructures with novel properties are obtained.
A question remains: what are the fatigue properties of a laser-hardened surface in comparison with, for instance, bulk or induction hardening?
The hardening set-up used for the K3 specimen, i.e. the lower velocity variant, did not improve fatigue properties and led, in part, to their deterioration.
Upon the procedure which led to enhanced fatigue properties, more notable compressive stresses were found in the direction of the main fatigue load.

For the ceramisite concrete developed in recent years, because it has marked difference between common concrete in mixing technology and constouctional material and mechanical property[2], In particular, different coarse aggregate can make so much difference from ceramisite concrete and common concret, there is different size effect to concret that made by different ceramsite.
The distribution of aggregate will be affected, if we change depth-width ratio.
For the specimen with differert depth-width ratio, depth-width ratio is the most important factor,the formula 4 can not meet result.Take depth-width ratio as corrected value,improve the formula 3,the formula 5 can be found （5） then，，it is closed to the fact more，and contain many factors.
Influence factors of size effect in experimentation Factors that affect the size effect of concrete have the following: 1, Load rate in experimentation.
Through the experimentation, whether or not the center of pressing machine is aligned with the center of specimen, whether or not the platen of pressing machine is leveled off, whether or not the surface of specimen is leveling, whether or not intersecting plane meet at right angles, these factors will affect the test results. 3, As artificial causes, the distribution of aggregate is not uniformity in mixing, vibratory rammer forming is nonuniform, these produce a huge effect to strength.

Introduction Residual stress is one of important factor of machined surface quality, and it has great impact on fatigue life[1].
Residual stress is the result of thermal-mechanical coupling.
Thermal stress is more than mechanical stress on specimen outmost surface and it is less than mechanical stress in interior, so that the residual stress is mixed stress.
Experiment results in Exp.1~4 indicate cooling effect of cutting fluid can affect the maximal value of residual stress, and its lubricating effect can affect the residual stress layer thickness and the depth of the maximal residual compressive stress beneath machined surface.
Cutting fluid have various effect on residual stress in different cutting conditions; when great cutting heat and mechanical deformation are generated on machined surface, cutting fluid has greater influence on residual stress and even with the different various cutting fluid property.

The surface morphology, thickness, composition, state of the constituent elements and optical properties of the films were studied with X-ray diffraction (XRD), scanning electron microscopy (SEM), step height measurement instrument, X-ray photoelectron spectroscopy (XPS) and spectrophotometer, respectively.
The affect of annealing for the Cd1-xZnxS thin films was studied.
However, the chemical reaction in CBD was sensitive to many factors with interacting each other, such as kind and consumption of reactant, ratio of reagents, reaction temperature, reaction time, pH value of the reaction solution and stirring rate, and so on.
The morphology, structure, composition and optical properties of Cd1-xZnxS thin films were investigated.
All the solid reactants were dissolved in de-ionized water in advance and mixed with mechanical agitation at medium speed for 8 to 10 minutes in the 1000 mL beaker.

At present, the research of PPS filter media mainly concentrated in failure reason analysis of filter media in use and the influence of flue gas compositions on the performance of filter media, and the high-temperature performance of PPS filter media was studied mostly by changes of mechanical performance under high temperature[3-5].
Table 1 Performance factor of filter media Samples Fiber Mass Area Ratio (g∕m2) Thickness (mm) Air Permeability (m3∕(m2·min)) Postprocessing B1 PPS2 611 1.86 6.80 heat setting N3 PPS3 619 2.02 6.78 heat setting PPS2 and PPS3 are different fibers from different manufacturer.
According to the TG and DTG curves of PPS filter media, heating rate affects the thermal weight loss significantly.
Research on Mechanical Properties of Filter Media under High Temperature[A].Northeastern University.
Mechanical degradation of filter polymer materials: Polyphenylene sulfide.

This research is potentially significant for dish Concentrating Solar Power (CSP) in general and other emerging CSP systems that require high concentration factors. 1.
When combined with other error factors due to design, construction and tracking of the dish and accuracy of mirror surface, the resulting composite divergence angle can become significant.
The benefit becomes more variable as the rim angle decreases, showing unusual reversals in trend in the 800 rim angle case.Right on 700 however, and specifically at an inner radius of 1m, there is a jump in concentration factor because the intersection shape was a very pure ellipse and geometric factors bring the elliptic focal plane intercepts of the two rim extremities closer to horizontal in orientation and aligns them to completely overlap, and thereby increase concentration factor.
Geometric factors which then narrow these ellipses towards a circular shape further enhance concentration.
[28]Pissasale, A.J. and Ahmed, N.A., ‘Development of a funct rel between port pressures and flow properties for the calibration and appl of multi-hole probes to highly 3D flows’, Experiments in Fluids, Vol. 36, No. 3, 2004, pp. 422-436

Effects of Process Parameters on Surface Quality in Turning of Mild Steel with Rotary Cutting Tool Murat Kiyak1,a, Erhan Altan2,b 1 Yildiz Technical University, Department of Mechanical Eng., Besiktas 34349, Istanbul 2 Yildiz Technical University, Department of Mechanical Eng., Besiktas 34349, Istanbul akiyak@yildiz.edu.tr, bealtan@yildiz.edu.tr Keywords: Rotary tools, surface roughness, self propelled rotary tool Abstract.
Introduction During machining, heat generation affecting tool and workpiece is seen.
Ezugwu et al. investigated the general properties of the self-propelled rotation tools, factors effecting tool life, tool wear and surface quality of the machined surface and they compared the results with that of conventional tools [2].
Dessoly: Modeling and Verification of Cutting Tool Temparatures in Rotary Tool Turning of Hardened Steel, Master of Science Thesis in Mechanical Engineering Georgia Institute of Technology (2004) [10] L.

It is helpful to improve corrosion resistance properties of the metal surface in the form of additive [6].
In order to improve the purpose and scientific of the experiment, orthogonal test was adopted with four factors and three levels table L9 (34), such as current density, pulse frequency, duty ratio and Na2WO4 concentration, the specific processing a list of factors and levels shown in Table 1.
Table 1 Factors and level of the orthogonal experiment factors levels 1 2 3 Pulse frequency（Hz） A 300 500 700 Current density（） B 3.0 5.0 7.0 Na2WO4 concentration(g/l) C 4.0 2.0 0.0 Duty ratio D 30%/70% 50%/50% 60%/40% 3.
It is possible that the corrosion resistance of MAO coatings were affected by surface morphologies, phase compositions and other factors.
The properties of coating formed by microplasma oxidation on magnesium alloy [J].