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The effects of pressure on the wear resistance characteristics, mechanical properties and the microstructures of Al–Si piston alloys that have variable Magnesium (Mg) content are studied [12].
Tensile and impact tests were conducted to evaluate the influence of the interaction between grain refiner and modifier on the mechanical properties.
Variance ANOVA was used to estimate the optimum level and determine the magnitude of the influence of various factors. 
The evolution of microstructure can affect the hardness properties of metal alloys, and it can be due to the difference of phase morphology [18].
Conclusion In conclusion, the chemical compositions and mechanical properties of four different types of recycled aluminum are discussed.

Applying modification on PVDF membrane can improve its hydrophilicity and anti-fouling properties, of which blending modification is expected to be a hotspot of study in future.
Solvent type, coagulation bath medium, temperature, and additives are all important factors that have influences on PVDF membranes.
The composition and the temperature of coagulation bath will influence the exchange rate between solvent and non-solvent, thus affecting membrane structure and performance.
The retention rate of bovine serum protein increased from 25.11% to 67.20% and mechanical properties are certainly improved.
Conclusions During the process of preparing PVDF by means of immersion precipitation, solvent, coagulation bath and additives are vital factors of influencing the structure and performance of membrane.

Introduction Thin hard coatings can be found in many mechanical applications.
Vickers microhardness (Remet HX-1000 Vickers microindenter) was evaluated on the titanium alloy bulk samples before and after the deposition to assess any changes in the mechanical properties induced by the heat treatment at 420°C.
The surface hardness of the alloy was not significantly affected by the deposition process (as received: 271 ± 4 HV0.5; after deposition: 286 ± 4 HV0.5).
The reduction of the applied stress is quantified by a fatigue stress intensification factor Kf calculated for a fatigue life of 200000 cycles.
Comparing it to the lower Kf from the fatigue tests, the notch root plasticity due to the stress redistribution may be supposed to be one of the main factors affecting the fatigue life of the notched specimens, as far as the uncoated ones are concerned [9,10].

Out of these options, GFRP wraps have become more important because of their superior mechanical properties, effortless application, and cost-effectiveness [5] [6].
In a different study, Dyer et. al. [8] examined the mechanical properties of composites are strongly influenced by fiber orientation, which in turn affects their capacity to withstand different stress situations.
This research focused on the combination of fiber orientations in GFRP such as unidirectional, bidirectional, and multi-axial, influence the mechanical properties and effectiveness of the repair, impacting the pipeline's ability to withstand internal pressures.
The finding indicates that the orientation of fibers significantly influences the mechanical properties and effectiveness of the composite wrap.
Ilyas, “Unveiling the physico-mechanical properties of kenaf yarn fiber-reinforced acrylonitrile butadiene styrene composites: Effect of quasi-isotropic lay-up sequences,” Polym.

Introduction As ceramic materials have many excellent properties[1-3], such as high insulated property, excellent heat-resistant, high wear-resistance and good erode-resistant property, they are widely applied in electronic industry and mechanical industry.
During laser milling, the machine tools do not need to touch work pieces directly and the work pieces can keep off mechanical force action and can be away form being worn out.
The rule of factors influencing removing rate and surface quality in laser milling was discussed by changing different processing parameters.
The experiment parameters of laser milling The factors affecting the laser milling included laser power, scanning speed and defocusing amount etc.
The positive and negative defocusing amount affects had great influence on the single pulsed pit, so the spot overlap could influent the single path milling width obviously.

There are two major factors to consider in this analysis.
These materials give daily chemical products packing necessary mechanical properties, such as flexibility, barrier and sealing, but are less good for elasticity.
Through comprehensive consideration of three factors, making the material with plastic and elastic, adapting to industry production and improving environmental protection, we have selected TPE rubber, also known as Thermoplastic Elastomer / Thermoplastic Rubber.
These required properties include good appearance, soft touch, strong tinting, color uniformity, high insulation, non-toxicity, temperature resistance at -60℃ - 70℃, outstanding barrier, good corrosion resistance (such as to water, acid, alkali, and alcohol solvents), anti-ultraviolet radiation and antioxidant properties, and adjustable hardness.
TPE material can directly replace the traditional PE plastic without affecting production standards or the industry production chain.

Fax: +86-10- 61772031 E-mail address: cqdong1@163.com Keywords: SCR catalysts, processing comparison, characterization comparison, factors analysis.
Processing and characterization of catalysts Table 1 present the structural properties of three forms of the catalyst.
It can not maintain its catalytic properties after the catalyst surface was wear and tear.
China’s coal is rich and varied, Many of which have the properties of high ash,Therefore, the Layout of high-dust environment SCR system congestion.
They only differ in structures which will affect their catalytic performance and application greatly

Research of the FEM Mesh Generation Based on Patran QianpengHan1 ,BoPeng2,a 1,2The school of mechanical and electronic engineering, Jianghan University, Wuhan, Hubei Province in China apengbo-he@163.com Key words: Finite Element Method ;Mesh Generation;Patran Abstract:Finite element method(FEM) have been widely used in modern mechanical design,mesh generation is an important part of the finite element analysis,this article discussed the process of mesh generation through two practical cases and put forward some issues we should pay more attention to.
The finite element analysis software mainly includes three core components:pre- processing module,analysis module and the post-processing module.Pre-processing part which accounts for about 45%~50% of the entire workload,post processing is about 55%~60% ,Only about 5% of the computing section[2].Pre-processing is the basis for follow-up work,the quality of pre-processing directly affects the accuracy of the model results.The core content of pre-processing is mesh generation,it will consume most of time of the pre- processing.The mesh generation is an important content in the finite element model,it has large workload and many factors should be Considered, therefore it is necessary to do some technology research to summarize the method of mesh generation.
Secondly, in order to ensure the correct transmission of force and moment,Displacement coordination is an important issue we must consider.A node of element must be adjacent node element,but not the interior point or boundary point,the node of the adjacent cells should have the same freedom properties[3].
At last good transition between the units is also a issue what we must conside,Unsmooth transition may reduce the accuracy of the results or even can not be calculated.Element shape also affects the calculation results,Regular polygon and polyhedron is the best choice.
Fig1 Generate the mesh seed Fig2 Finite element mesh of ring gear 3.2 Mesh generation of a certain type of intermediate shell Revolving body is a structure with a relatively common mechanical structure which always need to be finite element analysis, An intermediate shell of gear box will show as an example to analysis the method of generate mesh on the solid of revolution.

Therefore, the temperature is an important factor in the molding of biomass.
Considering many factors affect the accuracy of extrusion process, it is necessary to simplify the model appropriate treatment, and makes the following assumptions: (a) the initial straw materials room temperature is (20℃); (b) The thermal conductivity of air is small, ignoring convection; (c) Ignore the internal chemical changes in straw.
And thermal analysis directly related to the material properties includes: thermal conductivity, heat capacity, enthalpy, heat transfer coefficient, emissivity, heat rate.
The equation is: (1) The physical properties of the material parameters from the material is in Table 1.
Table 1 Thermophysical properties of materials Temperature[℃] Thermal conductivity [W/(m·℃)] Enthalpy [J/m3] 0 0.0025 55 50 0.006 100 100 0.012 130.2 150 0.016 162 200 0.014 200 Unit selection and meshing.

Results show that there is a close correlation between compression properties T2, T100, drape performance F0, shear stiffness G and stereotyped pleat recovery Angle.
The factors of influencing seamless sizing effect include the ironing process parameters, fabric performance, organizational structure, weaving processing parameters and many others.
Test project Mechanical properties Mechanical properties mainly include the following indicators: compression thickness T2, T100; bending length C; extensibility E5; bending rigidity B and shear stiffness G and Static drape coefficient F0.
Extensibility is too large, the fabric is easy to stretch, which affects the clothing size stability [4].
Conclusions (1)There is a strong direct correlation between compressive properties T2, T100, draping property F0, shear stiffness G and Stereotyped pleat recovery angle in 7 performances of fabrics.