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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.

Finite Element Analysis on Mechanical Properties of Lathe Spindle Y.M.
Yu Zhongyuan University of Technology, Zhengzhou, 450007, China flackstorm@163.com Keywords: Lathe spindle, Mechanical properties, Finite element analysis, ANSYS Abstract.
The ANSYS software was used to carry out finite element analysis on the mechanical properties of lathe spindle, taking C7620 lathe as research object.
Through static analysis, the linear static mechanical properties of spindle in specific operation are obtained, including the stress and deformation of spindle in processing; by dynamic analysis, the vibration characteristics of spindle including the natural frequency and vibration mode are determined, and whether the spindle speed is reasonable or not is judged.
During the modeling, for easier finite element analysis and the improvement of computational efficiency, the model is simplified without affecting the final calculation precision, mainly including that thread and keyway are processed as entities and the partial features such as tool escape and chamfer are ignored.

The mainly influencing factors were analyzed including vibration acceleration, frequency, exposure time and other factors.
Influencing Factors In a certain vibration environment of the human body, the blood capillary tension and smooth muscle contractile properties change.
In the vibration and shock environment, to human body caused by these results, there are three main factors affecting the human comfort.
Human vibration comfort is the result of three factors working together.
Other influencing factors.

Affect the comfort of pants crotch curve analysis of the factors Zhuo Zhang1,a,and Liping Qiao1,b 1 Department of Fashion Design and Engineering, College of Quartermaster Technology, Jilin University, Changchun, Jilin, 130062, China abobo-zz@163.com,b919007065@qq.com Key words: Comfort; structure; fabric; style; Abstract.
The two main factors affecting the values here: the first factor is the physical structure characteristics of human waist and hips.
The factor of fabric Clothing material has a direct or indirect contact with the human body, it plays a decisive role on influencing the comfort of clothing .The material of the clothing affects the comfort mainly on fiber structure of fabric and its properties, fabric structure, mechanical properties, surface properties, and the heat transfer performance.
While the factors of influencing comfort of trousers are not isolated, they are in an interrelated organic whole and they are interacted by each other.
We should improve comfort of the trousers considering various factors on the basis of knowing the factors of influencing the comfort well and make the trousers fit the human body better.

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.

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.

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.

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.

Therefore the welding parameters (preheat, post welding heat treatment (PWHT), shield gas, backing gas), affecting the microstructure of the weld, also have serious affects on the fatigue properties.
The other factor, that determines the mechanical properties of the heat affected zone, is the evolving prior austenite grain size under the welding process.
Too much heat transfer could raise the size of the prior austenite grains, which can not assure good mechanical properties [6].
Martensitic microstructure in the heat affected zone (dark part is the weld metal) To examine the distribution of mechanical properties within the welded joints, microhardness measurements were made as well.
Prohászka: Mechanical properties of metals and alloys (in Hungarian), Mőegyetemi Kiadó, (2001), pp. 233-236 [7] T.

Table 2 showed the mechanical properties of low carbon steel JIS SS400 [9].
Mechanical Properties of Low Carbon Steel JIS SS400.
Mechanical Properties Value Tensile Strength, Ultimate 415-515 MPa Tensile Strength, Yield 230 MPa Elongation at Break 20% Bulk Modulus 160 GPa Shear Modulus 80 GPa MIG Welding.
Factors that are expected to affect the surface residual stress after the deep rolling process are three factors: rolling pressure, rolling speed and the number of passes.
Table 8 shows that the most influential factors affecting the residual stress were factor C (Number of passes), factor A (Rolling pressure) and factor B (Rolling speed) respectively.