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And the thermal fatigue resistance of inner liner is one of important factors affecting its working life.
The increase of injury factors of No.3 and No.4 was fast.
Table 2 Injury factors of thermal fatigue cracks Circle Times 100 200 300 No.1 71.62 1266.14 5539.62 No.2 43.47 2851.15 8771.98 No.3 2406.35 12705.88 15801.68 No.4 640.78 11953.70 56003.45 Fig.4 Relationship curves between the thermal fatigue and its cycle times Morphology of Cracks in the Surface.
Considerable researches reveal that strength and plasticity are main factors for the thermal fatigue resistance [6].
Moreover, in actual working condition, materials work under certain external load, deeper cracks damage the properties of materials easily and the fracture of workpiece happens easily; thick and shallow cracks have smaller effect on mechanical properties.

Its physical properties are shown in Table 1.
Table.1 Physical properties of TC Titanium sort Density（g/cm3） Thermal Conductivity (W/mK) Tensile Strength (Mpa) Yield Strength (Mpa) Elongation ( % ) Elastic Modulus (Gpa) Melting Point (°C) Hardness（HRC） TC4 4. 40 7. 95 950 860 15 110 1400 30 Test conditions and tool.
Table.2 Factors level of the cutting tests Experimental factors Test level 1 2 3 4 fz(mm/z) /ae(mm) 0. 01/1. 5 0. 02/1. 2 0. 03/0. 9 0. 04/0. 6 vc(m/min) 105 135 165 195 Test Data Analysis This section analyzes the experimental data of full-factor experiment.
(4) Through the stress simulation analysis on the blade, the main factors of affecting the deformation and stress is cutting force.
[4] GongHu CaoLixin, LiuJian: Journal of Mechanical Engineering,Vol.41 (2006), No.11, p.134-139.

Finally, parameters affecting the operation accuracy of a press can be subdivided into influenceable and non-influenceable factors [9].
As further shown in [6] it becomes apparent that these two characteristic influenceable and non-influenceable factors are interdependent.
Table 1: Comparison of properties of roller and plain bearings.
The results are consistent with the bearing properties taken from literature [17].
With increasing press force the symbiotic bearing behaviour is initially characterized by the roller bearing properties.

Uniform dispersion of CNTs in the polymer matrix and good interfacial interaction between the nanotubes and polymer matrix are the most important factors that dictate the ultimate properties of the nano-composites.
The mechanical properties of the nano-composites would be reported.
Mechanical properties were tested according to ASTM standard.
Fig.4 Dynamic-mechanical property of the nano-composites with different MWNT content.
The mechanical properties of the nano-composites are summarized in Table 1.

Introduction In daily life, due to a lot of reasons and factors lead to the mechanical equipment or parts failure.
With the development of the modern science and technology, the requirements of mechanical safety and reliable operation is more higher.Failure analysis on fracture can grasp the cause of the accident, so it is particularly important.
Due to the influence of the external environment, conversion device accuracy, noise interference and transmission information loss and so on, Failure image quality will be affected during the image acquisition process, then affect the late recognition and analysis.
Mathematical morphology pretreatment Due to the influence of external environment factors, fracture images in collected will under the influence.
It focuses on the collection of image structures, This structure can not only describe the macroscopic properties about the research object,but can also said its microscopic properties.

The results will provide necessary reference for the further optimization design of condenser. 1 Introduction The application and development of the once-through boilers and nuclear power devices in the electricity industry lead to higher requirements for condenser performance [1].To analyze the stiffness and strength of large-scale condenser by using economic and efficient methods, it is particularly important to instruct condenser optimization design and to study the mechanical operation properties of the condenser components.
Similarly, air cooling zone of the tube sheets and air-cooled equivalent entity is also set bonded. 2.3 Mechanical properties of the tube sheets materials and condensing tubes As the tube sheet is a composite of different materials, we need to calculate its equivalent results.
These equivalent results of material mechanical properties in this paper are calculated according to relevant standards HEI.
Table2 Equivalent Mechanical performance parameters of tube sheets and tubes machinery performance equivalent elastic modulus[MPa] allowable stress Sm[MPa] perforated area 41147.12 50.23 unperforated area 189481.43 173 equivalent condensing tubes 5080 132.7 3 Results and analysis Stress and deformation are two main factors in finite element analysis.After calculation, the results of stress and deformation of condenser components are shown in Figure a~g, and the maximum equivalent stress and maximum deformation of components are shown in Tab. 3.
Mechanical Design( Higher Education Press, 2006)

Many factors will affect the molding quality of a part during manufacturing.
Factor is a variety of attributes or properties of objects, it is also called as parameter indicator or quality indicator which can reflect the comprehensive quality of various objects.
We usually evaluate a fixed object on the basis of these factors.
A factor set is composed of collection of some distinct factors which can be expressed as U = {}.
During FDM processing from nozzle, a change in temperature affects filamentous material flow firstly, and then affect other factors according to the order of extrusion width > bond performance ≈ accumulation performance..

The fabrication techniques of composites play a vital role in the improvement of tribological and mechanical properties.
This is because of large number of factors influences wear [3]; such factors may be concerned with metallurgy (chemical composition, volume percentage and size of Table.1 Important factors and their levels for lubricated sliding wear the reinforcement, etc.) or service (i.e. contacting materials, pressure, speed, etc.) or other contacting factors (lubrication, corrosion, etc.).
The feasible limits of the factors were chosen and they are presented in Table 1.
and exploring the effect of these factors on the response (i.e Wear Rate in this case).
The developed final model in reduced form with considered factors in coded form is given below.

It has been suggested that Sn-based solder such as SAC305 causes variations in mechanical properties due to the anisotropy of Sn [3, 4].
Polycrystallization may counteract anisotropy, reduce variations in mechanical properties and improve the joint life.
Tensile Properties.
Fig. 8 Schmidt factors of specimens with maximum and minimum tensile strength of SAC305 at 233 K
Suga, Mechanical properties of lead-free solder alloys evaluated by miniature size specimen, Proc. of SPIE 5852 (2005) 297-301

The analyses of dynamic stress intensity factors for wedge loading experiments on modified compact tension specimens, designated WLCT, were then performed by the finite element method.
The causes of SCC have been thought to be composed of the three factors，namely stresses，materials and environments [1, 2].
To this end, the determination of the materials’ properties under high loading rates, the test method of applying high velocity loading to specimens during SCC growth and the theoretical analysis of the dynamic stress state near the crack tip under high loading rates have to be established first.
The chemical composition and static mechanical properties of SUS304 are listed in Tables 1 and 2.
Table 1 Chemical composition of SUS304 (wt%) C Si Mn P S Ni Cr ≦0.08 ≦1.00 ≦2.00 ≦0.045 ≦0.030 8.00〜10.50 18.00〜20.00 Table 2 Static mechanical properties of SUS304 s0.2 [MPa] Elongation f [%] Reduction of area y [%] 280 41.6 78.8 Fig. 1 Geometry and dimensions of 1/2T-WLCT specimen Experimental methods.