Search results

By accounting the drawbacks associated with the use of SVO, it is found that, the chemically treated vegetable oil called “biodiesel” is a promising fuel, because of their properties are similar to that of diesel fuel (DF).
To reduce the level of oxides of nitrogen, emission control techniques such as exhaust gas recirculation (EGR) [6]–[8] could be adopted without affecting the engine performance.
The important physical and chemical properties of the biodiesel were measured and compared with ASTM standards as shown in Table 1.
The calorific value is acting as one of the limiting factors to estimate the thermal efficiency.
The effects of vegetable oil properties on injection and combustion in two different diesel engines.

The mechanical and corrosion properties of stainless steels welds are highly dependent on microstructure.
The heat input of laser beam welding is mainly affected by three different factors: absorption, laser power, and welding speed.
The heat affected zones were narrow in each cases.
Mechanical properties, microstructural stability and kinetics of σ phase formation in 29Cr-6Ni-2Mo-0.38N super duplex stainless steel.
Khourshid, T Sharef: Effect of Laser Beam Welding Parameters on Microstructure and Properties of Duplex Stainless Steel, Materials Sciences and Applications, 2011, 2, 1443-1451

Furthermore, the influence factors of transverse vibration response are researched including speed, crack depth, crack angle and eccentricity.
The virtual components of the cracked rotor model established in ADAMS environment will not produce deformation since their original property is rigid.
The crack angle only affects the amplitude of working frequency (1X).
Eccentricity only affected the working frequency and the second harmonic is unchanged.
(3) Crack angle and eccentricity only affect the working frequency (1X).

Electropulsing treatment was applied to high carbon pearlitic steel to assess the effects of the treatment on microstructure and properties.
At 40μs, no visible electropulsing effect was observed and no change in electrical or hardness properties was noted independent of the frequency applied.
No change in electrical properties was observed but microhardness was found to decrease after electropulsing compared to cold-rolled, unelectropulsed samples.
However, the literature suggests that other factors such as athermal effects (electron wind) may also affect the microstructure [8-10].
Liu, Effect of Electropulsing on Recrystallization and Mechanical Properties of Silicon Steel Strips, J.

Fig. 1 The structure of multi-axis cascading PCB drilling machine The high speed and high precision multi-axis cascading PCB drilling machine is a typical optic-mechanical integration product.
These factors lead to the increase of the stiffness and damping of Z-axis floor.
With the affect of contact stiffness and damping, the modes are similar and the frequencies have fewer differences in the fourth situation.
By the modal tests of the Z-axis floor on which the cascade is added and the motor spindle has been added, the results are compared with the ones without cascade, from which the affect of the cascade to the dynamic properties of Z-axis floor, which can offer the basis of the selection of cascade bar and determination of the size of the preload applied to the nut in the Z-axis floor when the cascade is assembled, is got to know.
This may have affect to the precision of drilling and the structure of the Z-axis floor needs improving.

Postoperative tendon adhesion has been one of the clinical problems plagued researchers, because it not only affects the outcome, but also results in serious postoperative complications and even makes the successful surgery fail.
Ideal anti-adhesion material should have good biocompatibility, suitable organization adhesion (needn’t sutures) , it can completely cover the wound surface and have sufficient residence time in vivo, in order to play a biological barrier function, must have a permeability, can degradation and absorption without the need for secondary surgery to remove it, can effectively prevent adhesion formation and without affecting the normal healing of wounds, should also have a certain degree of mechanical strength to facilitate the implementation of the operation.
Table 2 The mechanical properties of ES mats ES mats Elongation (%) Ultimate stress (MPa) Young's modulus (MPa) Annealed 2.50 ± 0.91 0.85 ± 0.69 30.3 ± 21.3 Non-annealed 7.54 ± 2.14 1.11 ± 0.42 23.6 ± 13.2 The Mechanism of Action of Chitosan Preventing Tendon Adhesion.
Chitosan can promote macrophage phagocytic function and improve the secretion of hydrolase activity, can secrete a variety of immune factors, regulate other cellular immunity and humoral immunity, thereby enhancing the body's ability of anti-infections.
The effect of Sodium Hyaluronate onTendon Adhesions The sodium hyaluronateIts is one kind of sodium salt, it has biological characteristics of hyaluronic acid, medical sodium hyaluronate solution has many important physical characteristics because its characteristics of without rules coiled state and hydrodynamic in solution, such as height viscoelastic, plasticity, permeability, unique theological properties and excellent biocompatibility, this biological material is non-toxic, non-antigenic, non-teratogenic and carcinogenic, it can promote tendon healing, prevent and reduce adhesion formation, it’s one kind of extensive used biomedical materials in clinical.

This article studies the hardness and temperature influence on the sealing properties of the sealing ring with Y section, that is between the piston rod and the cylinder barrel.
Within one period, the thermal energy converted from the loss of mechanical hysteresis per unit area is: ∆E=02πωσdε=πε02E2=πε02E1tanβ=πε0σ0Esinβ (6) In Eq(6), tanβ means mechanical hysteresis factor.
Heat flux distribution factor of target surface and contact surface is set to the default value of 0.5.
Mechanical engineering, Beijing, 2000
A mixed lubrication model of a rotary lip seal using flow factors.

If the differential settlement after construction of the subgrade is too large, not only the pipelines will be damaged and broken affecting the normal work condition, but also the surrounding environment is polluted resulting in serious consequences[3,4].
The basic physical and mechanical properties of the two kinds of soft soil are shown in table 1.
The main reasons of the monitoring result are caused by factors such as the embankment height, the burial location, and thickness of the soft soil layer.
The individual monitoring test results are related to the factors such as the specific engineering geological conditions and loading process.
The main reasons of the monitoring result are caused by factors such as the embankment height, the burial location, and thickness of the soft soil layer.

Further, a modified mechanism with higher stiffness and improved process protection system properties will be described and compared to the current status.
The examination of the affected components suggests a mechanical overload, which mainly results due to collisions.
For example the stiffness or the moving masses are influencing factors [7].
This mechanical system operates independently of the used drive types and works energy-self-sufficient.
After the detection the control unit of the machine tool will run an emergency stop to support the mechanical protection system.

Geometrical parameters of welded joint affect the stress concentration coefficient seriously.
The stress concentration sensitivity of structural materials is primarily determined by their properties, theoretical stress concentration factor, the size of the objects under investigation, loading conditions [2].
There are a lot of factors influencing fatigue strength of welded structures, but stress concentration is the most important one.
The influence factors on stress concentration of welded butt joint This paper focuses on the main factors, including weld toe inclination angle θ and weld edge transition arc radius r.
Stress concentration factors and fatigue behaviour of welded thin walled CHS-SHS T-joints under in-plane bending[J].