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Lu[3] studied the frictional and mechanical properties of PTFE composites filled with Nano-SiC.
PPS fiber has many properties, such as heat resistance, corrosion resistance, flammability, low moisture absorption, high mechanical properties, excellent chemical resistance and electrical properties[5].
In this experiment, different fibers and low-cost of graphite are added to modify PTFE, preparing PTFE composites with excellent mechanical properties and anti-friction wear resistance and analyzing impact properties, tensile properties, hardness and other mechanical properties which are affected by different fillers and content, studying friction and wear behavior and wear mechanism during the process of composites sliding at last.
Mechanical property testing.
Fiber is the main factors to the impact strength of PTFE matrix composites for fiber affects failure mode of composites in the process of impact.

The intrinsic properties of the components, morphology of the system and the nature of interface between the phases determine the dynamic mechanical properties of the composite.
Both frequency and physiological saline had obvious effects on the dynamic mechanical properties for n-HA/PA66 composite.
The dynamic properties, generally expressed in terms of storage modulus, loss modulus and damping factor, can give insight into material structure, provide a convenient measure of polymer transition temperature and understand the other important properties such as fatigue and impact resistance.
To our knowledge, there is no report on dynamic mechanical properties for n-HA/PA66 biocomposites.
Fig.6 and Fig.7 show the effects of physiological saline on dynamic mechanical properties of 40wt%n-HA/PA66.

Theoretical Analysis and Validation of Factors Affecting the Permeability on Coal Containing Gas Gang Xu1,a, Ruifeng Ma1,b, Quanbin Mou2,c 1College of Energy, Xi’an University of Science and Technology, Xi’an 710054, China 2Xi’an Research Institute Ltd., China Coal Technology and Engineering Group, Xi‘an 710077, China axugang25193@126.com, bshenhangmafeng@163.com, cmuquanbin518@126.com Keywords: coal permeability, porosity, gas pressure, gas adsorption expansion, temperature.
Based on definition of porosity, permeability model of gas-bearing coal was build which took porosity gas pressure, gas adsorption expansion, temperature and crustal stress into account, and the factors affecting the permeability of gas-bearing coal has been analyzed theoretically.
There are a lot of factors influencing coal permeability.
All kinds of influencing factors should be considered if we want to obtain the expected extraction results.
Analysis of Factors Affecting the Permeability on Coal Containing Gas The permeability model of gas-bearing coal was analyzed using coal sample from the coal seam JI-15 of 1st Coal Mine of Pingdingshan Coal Industrial (Group) Company, and the mechanical parameters were shown in Table 1.

The effect of tool rotational speed and welding speed, on microstructure and mechanical properties were analysed in detail and presented.
Liu et al. [4] have friction stir welded AC4 cast aluminum alloys and presented the microstructure and mechanical properties of the joints .They reported that the joint exhibits better mechanical properties than base materials.
Fig. 4 SEM picture of the fractured surface of sample 3 Mechanical properties.
Finer grain size and proper material mixing can be observed in the SZ, which favours higher mechanical properties. 2.
Nogi, Microstructure and mechanical properties of friction stir welded joints of AC4A cast aluminium alloy, Mater.

The alloys with 0.1%Ti have the optimal mechanical properties.
Microstructure and Mechanical properties.
Fig.5 shows the mechanical properties of A356 alloys with different Ti content.
The restricting factors that affect the prime α-Al grain growth also have an effect on the growth of eutectic α-Al.
The alloys with 0.1%Ti have the most excellent mechanical properties.

Investigation’s aim was to detect the influence of the post consumer PET (20-100 %.) quantity on films mechanical properties. 2.
Mechanical properties After the tension tests, the tensile strength results are obtained.
Thermal, mechanical and permeation properties of gamma-irradiated multilayer food packaging films containing a buried layer of recycled low-density polyethylene.
Thermal, mechanical and permeation properties of gamma-irradiated multilayer food packaging films containing a buried layer of recycled low-density polyethylene.
Factors affecting degradation of polyethylene terephthalate (PET) during pre-flotation conditioning.

Hardness and tensile properties of the specimens were measured.
Leading wire current, trailing wire voltage and welding speed are the major factors affecting weld bead profile and microstructures in weld metal and fusion zone.
Table 4 Tensile properties of weld bead No.
Conclusions The influence of welding process parameters on the weld bead dimensions and mechanical properties was investigated in the present work.
(3) Reduced heat input enhances the formation of strengthening phases in weld microstructure and yields good mechanical properties.

These steels reach high level of mechanical properties.
An understanding of the deformation response of steel sheets requires consideration of all of the factors affecting the deformation behaviour of their individual components as well as of the following aspects: (i) the composition of the steel, (ii) the relative amount of the phases, (iii) the morphology of the phases, (iv) the nature of distribution of the phases, (v) the orientation relationship between the constituents [3].
Chemical composition, mechanical properties and thickness t of the steel sheets used are in Table 1.
True deformation affects the indentation mechanical characteristics of steel.
There are different possible factors affecting increase the indentation hardness.

Effects of various welding technologies on mechanical and fracture properties were studied.
Effect of elevated operating temperature on material properties was evaluated, too.
The nominal chemical composition of the steel 10GN2MFA is listed in Table 1 and required mechanical properties at room temperature and at 350 °C are summarized in Table 2 including impact toughness at +10 °C and also transition temperature TK0.
Although the same tempered bainitic structure, very similar width of HAZ as well as good mechanical and also unconventional properties were observed in all weld joints, the highest mechanical strength was achieved in Weld 3.
Resistance of 10GN2MFA-A Low Alloy Steel to Stress Corrosion Cracking in High Temperature Water, Nuclear Power - Control, Reliability and Human Factors, Dr.

The Mechanical Properties of Lightweight Concrete under Different Factors Xi Liu, Beibei Lv, Tao Wu School of Civil Engineering, Chang’an University, Xi’an, Shaanxi, China lvbeibeial_si@163.com Keywords: lightweight aggregate concrete, ceramsite, water-binder ratio, fly-ash content; compressive strength Abstract.
By choosing domestic ceramsite as lightweight aggregate, mixing with active mineral admixture (fly ash) and the water reducing agent, and adopting the method of absolute volume to design the three ceramsite concrete mixture ratio, 27 groups, 243 lightweight aggregate ceramsite concrete test cubes of 100mm×100mm×100mm are obtained for compressive strength test, and the physical and mechanical properties of the aggregate are studied.
The shapes and surface of ceramite are shown in Figure1, and the physical and mechanical properties are shown in TABLE 1.
Various physical and mechanical properties of lightweight aggregate Types Cylinder compressive strength (MPa) Bulk density (kg/m3) Apparent density (kg/m3) 1h water absorption (%) 24h water absorption (%) Particle size (mm) clay ceramsite (N) 5.6 663.6 1174.3 5.6 9.8 5~16 fly ash ceramsite (F) 9.6 936.0 1400.0 16.4 20.1 5~16 shale ceramsite (Y) 10.5 824.2 1510.4 3.0 8.2 5~16 Design of Mix Proportion.
Compressive strength for same ceramsite different water-binder ratio Failure Mode of High-Strength Lightweight Aggregate Concrete The mechanical properties of concrete are decided by the performance of aggregate, properties of hardened cement paste and the bond behavior of hardened cement.