Search results

Their common disadvantages are: low productivity, low yield, instability of the physical and mechanical properties during further plastic processing of the alloy, etc.
The technology allows providing complex effect of such factors as high speed cooling and magnetohydrodynamic stirring during the liquid phase on crystallizing ingot.
The high rate of cooling is achieved by two factors.
Investigation of physical and mechanical properties of cast sections showed that the technology allows the combination of strength and plastic properties, which makes it possible to deform the material with degrees of deformation up to 99 % without intermediate annealing.
Physical and mechanical properties of alloy 01417M.

Introduction Ceramic tool materials have been widely used in dry cutting and high speed machining because of the excellent mechanical properties.
The hot-pressing technology parameters, including fabrication temperature, pressure and duration time, finally govern the mechanical properties of the ceramic tool materials under the condition of the same compositions.
Fabrication temperature and duration time significantly affect the mechanical properties and microstructure of Si3N4 matrix ceramic tool materials [1].
However, it is very difficult to optimize the fabrication parameters for the desirable microstructure and mechanical properties by experiments.
However, those simulation models are not coupled with the fabrication temperature, which is essential to the mechanical properties of ceramic tool materials by the effect of those parameters on the microstructure evolution during fabrication.

This constitutes the necessity to study the propagation patterns of cracks and its influence on mechanical properties of rock mass.
To simulate the physico-mechanical properties of sandstone, a new kind of rock-like mortar material mixed with cement, sand and water was developed, and its physico-mechanical parameters are listed in Table 1.
Inclination angle  affects the distribution of KII distinctly.
Experiments were conducted to investigate the mechanical properties and fracture state of rock-like samples containing single inclined pre-existing crack under uniaxial tension.
FRANC3D was adopted to calculate the stress intensity factors along crack contour, and to simulate the crack growth process.

The anti-seismic fortified length of tunnel portal to the effects of dynamic and crack property was studied.
With the Druck-Prager yield criterion adopted[8], the mechanical parameters of material are shown in Table 1.
Because of the tunnel portal exposed outward, geological conditions that are the severely weathered accumulation bodies are poor, it will seriously affect the life and properties of the lining structure if the lining acceleration is too large.
Conclusions Under the high seismic intensity condition，there are many factors, such as topography ,lining material ,surrounding rock type and so on, which affect the anti-seismic fortified length of tunnel portal.
In order to accurately determine the anti-seismic fortified length, it need to take all factors into consideration to the effects of internal force, dynamic and cracking property of lining structure.

The Effects of Laser Texturing Parameters on Wear Properties of Rollers with Fractal Geometry Hongbin Liu1,a , Daping Wan 1,b and Dejin Hu1,c 1School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai, China, 200030 ahunking2008@yahoo.com.cn; bwdp@sjtu.edu.cn; cdjhu@sjtu.edu.cn Keywords: Laser texturing, Fractal geometry, Friction and wear, Surface roughness Abstract.
The roller is major component for the production of high-quality steel and the service life of the roller is largely determined by the wear properties.
Thus, the processing parameters are linked with the wear properties of laser textured surface, which will provide better guidance for the processing.
The processing parameters of laser texturing are linked with the wear properties of roller surface based on the relationship between the fractal parameters and surface roughness.
Yang: Chinese Journal of Mechanical Engineering, Vol.39 (2003) No.7, pp.107-110.

The surface cleaning of retired products and their components is an important step in remanufacturing process and a prerequisite for detection of the components’ surface size accuracy, geometric accuracy, roughness, surface properties, sticky situation and other performance accuracy.
With the common effort of many institutions who devote into laser cleaning research, conclusions are made about the laser processing conditions and the interaction between complex updrafts and mechanical factors[19,20].
Its mechanism may be the combined results of factors such as dynamics, thermodynamics and chemical reaction, which also allows the dry ice cleaning method to have multiple cleaning effects [21].
Compared with solid, liquid and gaseous materials, it has different physical and chemical properties, thus plasma is also called the fourth state of matter.
Chen: Mechanical Equipment Maintenance (Mechanical Industry Press, China 2001), pp.97-101.

Human factors ii.
Vehicle factors iii.
This is followed by environmental factors and behavioural factors.
Environmental factors form 27%, and behavioural factors comprise 26.1%.
Fouladirad, Analytical properties of an imperfect repair model and application in preventive maintenance scheduling.

GMM differs from ordinary elastic material, the material has stronger nonlinearity and is easily affected by external factor such as stress, temperature, magnetic field and so forth[4].
But this is the favorable factor which makes magnetization field in magnetostrictive rod relatively uniform.
Summary This paper systematically elaborated GMM application characteristic, Analyzed external stress, magnetic field and magnetic belt machine factors, coupling and temperature...etc. and shrink material characteristic of impact.
It uses finite element analysis to simulate mechanical properties, modal characteristics of preloading mechanism, permanent magnetic circuit and electromagnetic circuit of giant magnetostrictive micro-displacement actuator.
Dapino,Alison B.Flatau and Frederick T.Calkins．Statistical Analysis of GMM Material Properties.Journal of intelligent material systems and structures Vol.17 July 2006

But, the effect of various factors on the properties of plastics is a significant challenge to ensure the safety of vehicles.
The function includes several adjustable parameters to match the change of properties caused by the factors such as temperature etc.
So, the modified model concerns the factor of time as a minor one and cancels the relaxation tests which shorten the test cycle for obtaining the properties of plastics.
Finally, it follows from the adjustable functions and boundary conditions that , (2) where E describes elastic properties, A and B characterize its properties plastic flow and constant k stands for properties of material.
[10] Hufenbach W, Gude M, Böhm R, The effect of temperature on mechanical properties and failure behaviour of hybrid yarn textile-reinforced thermoplastics, J.

They have been demonstrated to improve the physicochemical and mechanical properties of polymers.
The previous deterioration aspects resulted from the physicochemical and mechanical deterioration factors, which related to the open environment in which the statue is displayed.
They have been demonstrated to improve the physicochemical and mechanical properties of polymers.
Mechanical properties To assess the consolidating effect of the used nanocomposites, the treated and untreated quartzite samples were undergone to a compressive strength test.
[16] El-Gohary, M., Effective Roles of some deterioration agents affecting Edfu royal birth house "Mammisi", International Journal of Conservation Science, 6 (3), (2015), 349-368