Search results

By the preliminary tests, the impacts of various factors on the processing of small holes by combined ultrasonic and electrochemical machining were analyzed and some problems were found, which provided a basis for the future research.
Holes processing is one third of total of mechanical machining.
The effect of speed to quality of holes The factors of voltage, IEG, rotary speed and feed rate are chose as the experiment factors.
The collected current in the experiment is relatively large and the value can reach 20A, which affected the test results.
Mechanical Engineer, 2001(1):8-10; [6] Xu JiaWen, Yun NaiZhang, Wang JianYe etal.

At present, Ni-base superalloys are the most primary structure materials of choice for high temperature turbine blade applications as they satisfy a unique combination of desired properties.
As the application temperature further increases, the mechanical properties show a sharp deterioration due to the serious surface degradation in service.
It is considered to be very hopeful to become the thermostructural material with outstanding mechanical properties even close to its melting temperature if its mechanical property especially the room-temperature ductility could be evidently improved [1].
During the laser zone remelting and rapid solidification process, laser scanning rate and power density are the most key influence factors determining the eutectic growth.
The addition of zirconia and fine rapid solidification microstructure contribute to the improved mechanical properties.

However, changing the oil too late may affect vehicle performance.
In order to avoid an engine failure, the oil must be changed before it loses its protective properties.
That axis change point shows change in properties of oil.
For better results, in further analysis, measurement of additional properties like density, pressure etc. can be employed along with viscosity and colour.
Sebor, Composition and oxidation stability of SAE 15W-40 engine oils, 2000 [4] Charlotte Besser, Nicole D’orr, Franz Novotny-Farkas, Kurt Varmuza, G unter Allmaier, Comparison of engine oil degradation observed in laboratory alteration and in the engine by chemometric data evaluation, 2013 [5] Arpit Mehta, Map Colors of a CIE Plot and Color Temperature Using an RGB Color Sensor [6] Charlotte Besser, Nicole D’orr, Franz Novotny-Farkas, Kurt Varmuza, G unter Allmaier, Investigation of long-term engine oil performance using lab based artificial ageing [7] M.R.Fenske, C.E.Stevenson, N.D.Lawson, The Pennsylvanis College, Oxidation of lubricating oils, factors controlling oxidation stability [8] A Publication of the Lubrication Engineers Technical Department, Motor oil degradation

They have remarkable electronic, optical and mechanical properties.
To use the properties in applications, SWNTs with high quality and in high quantity are required.
Tubes with different chiralities, i.e., diameters and chiral angles, have different physical properties.
The bond energy in nanotube caps and nanotubes depends on many factors.
It is mainly affected by the chirality of the structure.

Effect of the severe deformation by multi-pass rolling on microstructure and tensile properties was analyzed in terms of rolling temperature, plate thickness, and cooling rate for a modified API X65 steel containing B.
Results and Discussion Mechanical Properties.
Mechanical properties are presented in Table 2.
Mechanical Properties of an Alloy Containing Boron.
At present, howerver, since heat 1(WQ) may have a lower hardenability, as compared to heat 2(ACC) due to the difference in matrix composition according to unknown factors, it is impossible to directly compare these specimens in terms of cooling rate.

But there are controversies over the HA properties of biological and mechanical prostheses.
The fixation between host tissues and substitute materials still belongs to the mechanical or morphological type.
The static friction factor is defined as resistance generated for the contact between the active tendency body and other body on the interface.
The static friction factors vary significantly among different materials.
The results of this paper demonstrate the affects of the stress distribution between bone and prosthesis with different biomechanical properties.

In addition to these constraints, factors that hamper the pace of analytical research in particular were difficulties associated with the construction of mathematical models formalizing complex electromechanical phenomena occurring during forming and the lack of computers in high-power, which could be used to carry out numerical calculations.
Further sections of the article contain an analysis of the phenomena occurring during the electro-dynamic metalworking, whose character determines the possibility of affecting a particular forming procedure.
Introduction quotes the relationship (1) that determines the force affecting a unit of length of the current-carrying wire.
Distributions of the pressures affecting the surfaces of the machined elements The pressures acting during electro-dynamic forming were calculated on the basis of the previously determined H values of the magnetic field’s intensity, occurring on the surfaces of the moulded semi-finished products.
It should be noted that before the electrodynamic forming of the majority of samples of tubes there were recrystallizing annealing, after which there was determined the material constants or values defining the mechanical properties of metals, which were pipes made.

The rock mass weathering characteristics Weathered rock is mainly affected by topography, lithology, structure, groundwater and other factors,Grading of the weathering degree of rock mass in the slope can be simply divided into strongly ~ moderately weathered, weathering forms are mainly dominated by area.
But the slope toe outcropped granite, under the condition of slope toe was excavated two groups, affected by the failure phenomenon, the wedge sliding. affected by the surface structure of the two groups, there has been sliding wedge failure phenomena.
In the strength reduction method, safety factor of slope stability is defined as: While the slope just reaches the critical failure state, the degree reduce on rock soil shear strength, that safety factor is defined as ratio of the actual shear strength of rock soil and the shear strength after reduction when happens critical failure.Points of strength reduction method is using type 1, type 2 to adjust the strength indicators and of rock and soil ( in the type, is cohesive force after the reduction, is friction angle after the reduction, is reduction factor), then make numerical analysis for the slope stability, continuously increase the reduction factor, calculate repeatedly, until it reaches the critical damage, the reduction factor is the factor of safety.
Table 1 Mechanical properties of granite indicators recommended values Project The recommended value of strongly weathered granite The recommended value of weathered granite Natural density (KN/m3) 23.3 25.5 Shear wave velocity (m/s) 587 1230 The internal friction angle (degrees) 32 40 Cohesion (kPa) 30 45 Poisson's ratio 0.36 0.25 The softening coefficient 0.56 0.87 This paper adopts the fast Lagrange difference algorithm, uses Mohr Kulun constitutive model, puts convergence in numerical calculation as a criterion of instability, to make calculation of fast Lagrange finite difference.
Even taking into account the unfavorable loading factors on the slope, the slope stability is also no problem.

Analytical Model The mechanical properties of the hybrid composite used depends strongly on the specific conditions of implementation and storage.
It is difficult to describe its behavior by a model that can link its mechanical properties to its internal structure.
For a constraint and a given temperature, the Findley model can be written as: According to the principle of superposition and for given reference conditions (σr, Tr), equation (2) can be written as : where av and ah are respectively the vertical and the horizontal shift factors.
Trend lines for av and ah give the following equation: Figures 4 et 5 show the evolution of the shift factors av et ah for σr=18MPa and Tr=50°C.
Fig.5: Horizontal shift factor versus stresses Fig.4 :Vertical shift factor versus stresses We can see from the curves Fig. 4 and 5 the influence of stress on the two shift factors.

The product, placed in a low-temperature plasma, is simultaneously impacted by a number of factors: charged and excited atoms, molecules and radicals, ultraviolet radiation, heat flux, electromagnetic field [11].
Kelley, Effect of hemicellulose extraction on physical and mechanical properties and mold susceptibility of flakeboard, J.
Pizzi, Optimising the properties of OSB by a one-step heat pre-treatment process, Holz Roh Werkst., 64 (2006) 227-234
Kazemi-Najafi, Influence of hydrothermal modification of fiders on some physical and mechanical properties of medium density fiderboard (MDF), Holz Roh Werkst., 66 (2008) 213-218
Chukhchin, The effect of beam-plasma modification of fibrin monomer on its biological properties, J.