Search results

Nallusamy4 1,2,3Sri Venkateswara College of Engineering, Department of Mechanical Engineering, Irungattukottai, Sriperumbudur- 602 117, Tamil Nadu, India. 4SSN College of Engineering, Department of Mechanical Engineering, Old Mahabalipuram Road, Kalavakkam - 603 110, Tamil Nadu, India. 1rvivekmech@gmail.com, 2praghu@svce.ac.in Keywords: Diesel, Biodiesel, Spray cone angle.
Rakesh Sarin et al (2007) [4]Jatropha–Palm biodiesel blends: An optimum mix for Asia this study shows South-East Asian countries, blends of Jatropha and Palm biodiesel have been examined to study their physico-chemical properties and to get an optimum mix of them to achieve better low temperature properties, with improved oxidation stability L.M.
The experimental correlation for the spray angle was found as follows: tan (θ/ 2) = 0.15P0.017 ν -0.7 (1) It could be concluded that the spray angle is mainly affected by fuel viscosity.
A measurement of spray development for diesel and neat RO biodiesel fuel using the high-speed digital camera and engine rpm is 500, the differences in physical properties of fuels results in a higher injection pressure and narrower spray angle of biodiesel.
The influence of ambient pressure, ambient temperature, injection pressure, fuel viscosity and orifice diameter are the key factor for affecting the spray angle for diesel, biodiesel and its blends should be examined.

Thus, multilayer foil with the flat continuous nano-layers and advanced mechanical properties was obtained in the Cu-Nb system: bilayer thickness was about 10 -20 nm [14].
These effects are probably caused by difference in mechanical properties of Ni and Al (yield strength, hardness, etc.) and sliding of the layers relative to each other.
Some of the multilayer foils possess interesting mechanical or physical properties, e.g., high tensile strength or superconductivity.
Correlating mechanical properties to microstructure in rolled nickel aluminum reactive laminates.
Evaluation of mechanical properties and structure of multilayered Al/Ni composites produced by accumulative roll bonding (ARB) process.

The more detail description on thermo-mechanical coupled theory at finite strains can be found in P.Rosakis [12], M.canadija [13].
Up to now in the continuum sense, the thermo-mechanical coupled model considering crystal plastic slip deformation are rarely occurred.
Thermo-mechanical coupled equations.
Elastic-plastic tangent modulus Constitutive relation.Generally think that the elastic properties of the crystal is not affected by the slip deformation [24], taking into account the impact of thermal stress, the elastic constitutive relation in the intermediate configuration is written as: (4) Where, is Jaumann rate of the Cauchy stress tensor which is the co-rotational stress rate in terms of the coordinate system that rotates with the lattice.
In this system, the initial slip hardening modulus, the critical shear stress, the stress in the first stage, coefficient of rate-sensitive hardening factor is taken as .

Correlation factors have been calculated assuming a vacancy mechanism and applying a developed four-frequency model for the nearest-neighbor vacancy jumps on the alkali sublattice.
In non-cubic crystals, diffusivities and correlation factors are generally anisotropic.
In the present paper, these properties are investigated in the direction perpendicular to (001) denoted as c∗-direction.
The correlation factors fNa and fK for diffusion of Na and K cations, respectively, were calculated as a function of potassium mole fraction XK and for the frequency ratios ωNa/ωK of 10, 102 and 103 (Fig. 4).
Furthermore, the correlation factors for the interstitialcy mechanism are expected to be larger than for the vacancy mechanism.

In addition to the quality of the vehicle fuel itself outside of its normal operation can affect the dynamic performance of the vehicle engine, lubricating oil are also essential.
However, the failure of vehicle engine lubricating oil has many factors, therefore, we need to analyze vehicle engine lubricating oil’s whole life process to identify the main factors for its failure, in order to take appropriate measures to improve the vehicle engine lubricating oil’s quality reliability and service life.
Because occurrence of each event is likely to cause the different degrees’ change of the lubricating oil physicochemical properties, it is necessary to strengthen the detection of the lubricating oil failure. 4 Failure detection and prevention 4.1 Failure Detection Process Lubricating oil carries contamination, wear, aging, and other useful information for fault diagnosis.
If these information can be grasped fully, not only mechanical wear due to changing oil late can be avoided, but also waste of resources due to changing oil early can be avoided.
Mechanical Science and Technology, 1995 (Suppl.): 235-238, 154.

Introduction The basic properties of MEMS (micro electro mechanical system, MEMS) devices,which have the moving parts,such as resonator, vibration gyro, accelerometer and light switch,are the dynamic characteristics, especially in different frequency or under the condition of different voltage the movement amplitude.
The image edge effects can also affect the degree of tapering and clarity of the peak.
But the test results will have an impact ，because of uneven illumination, gray and other factors.In testing, collecting two MEMS dynamic image with noise (subject to Gaussian noise) to interference test, and verify that the algorithm in this paper, noise immunity and effectiveness. 3.1 The graphical results Computer simulation results are as follows： Figure.2 Contains the noise Figure.3 Phase correlation matrix Figure.4 The reconstruction Phase of the original image correlation matrix of Rank1 estimates Figure 5.
Conclusion Articles relying on MEMS dynamic testing system, the micro-structure of MEMS devices for stroboscopic imaging technique planar motion image sequence processing, the proposed sub-pixel motion estimation algorithm based on the SVD phase, experimental results demonstrate the feasibility of the algorithm and its traditional algorithm embodied in the advantages: 1. image differences due to uneven illumination, gray and other factors the test results will not have an impact, good anti-jamming. 2.direct the plane motion amplitude of MEMS micro-structure of the sub-pixel level without the need for difference and advantages.

The purpose of presented study was to evaluate the microstructure and properties of laser remelted surface of stainless steels.
The laser treatment was performed with the use of high power diode laser (HPDL) and the influence of beam power of 0.7-2.1kW on the properties of the surface layer was evaluated.
Introduction The laser surface remelting (LSR) is a well known technique used to improve mechanical properties and corrosion resistance of stainless steels surface layer.
The LSR of sintered stainless steel may result in the increase of density in material surface layer and improvement of mechanical properties and corrosion resistance.
Therefore, it can be supposed that the application of higher laser beam power, at least of 2.1kW with the purpose of surface remelting, could improve corrosion properties even in case of wrought material.

In addition, nanofillers can decrease surface roughness (SR) of orthodontic adhesives, which is one of the most significant factors for bacterial adhesion.
Moreover, their size and shape are usually considered as the key factors for their antibacterial efficiency.
It can be seen that use of nanoparticles can reduce bacterial activity and also improve mechanical, physical properties of materials in dental field.
Nanomechanical properties of dental resin-composites.
Antibacterial properties of resin composites and dentin bonding systems.

Investigation of Subsurface Damage Depth of Single Crystal Silicon in Electroplated Wire Saw Slicing Yufei Gao a, Peiqi Ge b and Shaojie Li 1 1 School of Mechanical Engineering, Shandong University, Jinan, China, 250061 a deargyf@sina.com, bpqge@sdu.edu.cn Keywords: Wire saw, Single crystal silicon, Subsurface damage depth, Surface roughness Abstract.
Wafer slicing process is a key technology, and the SSD generating in slicing can directly affect the workloads and costs of next working procedures.
(a) Vs＝2 m/s, Vw＝2.5µm /s (b) Vs＝1.5m/s, Vw＝12.5µm /s Fig.3 SEM micrographs of single crystal silicon surface (a) Indentation crack system induced only by normal load [5] (b) Cutting crack system induced both by normal load and tangential load Fig.4 Crack systems under a single abrasive The maximal propagation depth of median cracks affects the SSD depth directly.
In this case, median crack length and initiation direction will be affected by the tangential load.
Fig.5 Relationships of η vs ε and γ Fig.6 Relationship between SSD depth and SR The mechanical properties of single crystal silicon are E=187GPa，H=10GPa，KC=0.82MPa·m1/2.

Wan2 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. 2Chengdu Aircraft Industrial (Group) Co., Ltd, Chengdu 610092,China.
The perfection of tool is the key factor to guarantee the forming quality of composite parts.
In order to get higher surface precision, using composites, whose property especially the thermal expansion coefficient is close to composite part’s, to make the tool, can eliminate size error and deformation in the heating and cooling process[1-4].
The last, in the forming process, the temperature of the moulding board changes constantly and each point of the moulding board has different temperature, the part don’t cure synchronously, affecting the quality of the products.[5-6].
The heat-conducting property and the structure of the tool, will influence the distribution of the temperature of the composite part.