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PTFE maintain excellent mechanical properties at wide temperature range -196 ～ 260 ℃.Its chemical corrosion resistance and weatherability are good, except molten alkali metals, PTFE almost resistants any chemical corrosion.
Bag’s sew line is one of the factors which influences the broken bag in the filter property.So, before the bag puts into use, tension strength test should be done on the bag’s sew line .
When using different filter materials in line, it must be superior in the tested line in strong, heat resistant, chemical resistant and thermal expansion properties to that of the same filter material .
But testing after the line was heated at 180℃ for 24h, its strength has little change, the heating time has little influence on the properties of the suture, but the work state has great influence on the performance .
The temperature above 200℃ will make large changes in properties of the suture. 3 Tensile strength values drop much in the heating conditions of the 10min, but in 24h after heating and cooling to room temperature conditions strong values changes unobvious .

Forskitt et al. [4] used the Finite Element Method (FEM) to obtain the dynamic properties, namely Young’s modulus and Poisson’s ratio of a perforate.
These properties are then used to calculate the natural frequencies of the perforated panel.
As previous models concern with only the dynamic properties, this paper investigates the change of vibration level due to the introduction of holes into a solid panel.
Hill, Effective bending properties for stress analysis of rectangular tubesheets, J.
Brook, Elastic properties of plates perforated by elliptical holes, Appl.

In the preliminary work, Ni-Fe-C system was adopted as filling metal to TIG weld of YG30 and steel 1045, η phase formation and mechanical properties of the corresponding joints have been studied as well [3].
By adjusting the C content of which, the formation mechanism and microstructure features of η phase together with the composition factors that affect the formation of η phase are investigated detailedly.
The size of this type of η phases is about 20 µm, The other kind appears at the heat affected zone (HAZ) of the weld, and their size is similar to or slightly smaller than the original WC particle size (Fig.1 a).
(Mechanical Industry Press, China 2000) [5] T.

Modular design of the seeker in 3D environment We can see from the first section that, as the core of the DDD, domain model is the key factor of the success of DDD.
Different types of seeker have certain requirements for its structure, thereby affecting the size and the weight of the seeker.
The interface consists of mechanical interfaces and electrical interfaces.
The task is to do simulation analysis on the assembly of the seeker and its corresponding parts and analysis their dynamic properties, electrical properties and optical properties, to see whether they met the indicator parameters required.
Based on the thought of MBD, we offer subsidiary information to the 3D model of the product through integrating the design process, design knowledge, data, method and other factors and embedding Autovue product of Oracle Corporation to the system to markup model and documentation.

The natural characteristic of the negligible friction is a favorable factor but this result in a system with low damping performance.
Furthermore, to ensure high lateral mechanical stiffness, the air pressure is typically kept at a high value which causes the system to be susceptible to noise.
Thus, by varying the current, id, it is theoretically possible to alter the damping characteristics without affecting the other performance characteristics of the system.
An active eddy current damper is able to complement the damping without affecting the responsiveness of such a precision stage.
Hinata, Effect of eddy current dampers on the vibrational properties in superconducting levitation using melt-processed YbaCuO bulk superconductors, Physic C 274, pp 17-23, 1997 [4] CSA Engineering Inc., http://www.csaengineering.com [5] D.E.

Liu et al. proposed a quantitative-feedback-theory-based tracking control scheme to eliminate the mechanical vibration of XY table [6].
In that case, some neglected secondary factors in normal conditions could become key issues affecting dynamic performance.
And the residual vibration caused by high speed movement would seriously affect the positioning accuracy and stabilization time of the XY table.
So the x-axis position system motion produces the most significant mechanical resonance.
The achieved results are: For the complex electromechanical coupling system, the oversimplified analytical model could not reflect the actual physical properties of the system.

Introduction Light alloys are widely used in aeronautical industry, due to their excellent mechanical properties and their low density.
Among the main factors that influence Ra are the cutting parameters: cutting speed, feed and cutting depth [9,10].
The apparition of both incorporations (BUL and BUE) causes an alteration in the initial tool geometry that affects to the surface finish quality of the pieces [13,14].
The most influential factor is the change produced in the edge geometry.
Taskesen, The Effects of Cutting Speed and Feed Rate on Bue-Bul Formation, Cutting Forces and Surface Roughness when Machining AA6351 (T6) Alloy, Journal of Mechanical Engineering, 54 (2008) 521-530

In metals without the FCC microstructure the motion of dislocation is affected by the thermal agitation of the atoms.
This is followed by introducing the Weibull distribution function in terms of stress intensity factor that is widely used in literature for brittle fracture prediction.
(1) Where E=206 GPa and v=0.3 were the specific material properties within the range of temperatures.
We set Kmin equal to zero, invariant of material flow properties, crack-front configuration, and temperature.
But Weibull exponent is dependant on geometry [6], temperature and maybe other factors.

Fresh Properties of M40 grade SCC and ESCC with & without Fiber Sl.
It is necessary that the ecological factors capable of adversely affecting their service life can be given proper consideration, for long term durability of concrete structures.
· The Rheological properties and strength could be achieved with replacements of 40% QD and 30% FS in RS.
Properties of concrete incorporating sand and cement with waste marble powder, Adv.
Mechanical properties of self-compacting concrete incorporating quarry dust powder, silica fume or fly ash, Cons. and Buil.

Properties of steel cords are therefore crucial for overall strength of belts, if they are damaged, it may cause catastrophic failure of the whole conveyor.
Several factors cause belts exposure to the risk of damage.
These include: properties of transported materials (sharp edges of ore lumps), the impact of environmental factors (rain, snow, wide temperature range) and load variations inside belts due to non-stationarity of load stream.
Often cords are worn due to environmental factors (corrosion due to rain and moisture).
It should be underlined that one should take care about experiment because there are many factors that can affect acquired signals and further processing might not be successful.