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The objective was to identify the significant process parameters that affect the output characteristics.
Introduction Metal Matrix Composites (MMCs) are extensively used in structural, aerospace and automotive industries because of its light weight, high specific strength, good wear resistance properties.
The factorial portion of CCD is a full factorial design with all combination of the factors at two levels (high, +1, and low, -1) and composed of eight star points, and six central points (coded level 0), which is the midpoint between the high and low levels, corresponds to an α value of 1.
The factor settings with maximum total desirability are considered to be the optimal parameter conditions.
The main significant factors that affect the MRR are pulse current, pulse on time and pulse off time whereas voltage remains insignificant.

Stress corrosion cracking (SCC) is one of the most important questions about affecting chemical and oil equipment.
Welding residual stress is one of the main factors causing SSCC and SOHIC[5].
(3) In the same parent material under stress corrosion threshold stress intensity factor is greater than the KISCC of HAZ, showing the base metal properties of the sample resistance to SCC than the strength of HAZ
Chinese Journal of Mechanical Engineering,2007 (9):117-122 [7] BUCHHEIM G M.
Effect of hydrogen environment on the notched tensile properties of T-250 managing steel annealed by laser treatment[J].

Unique and desirable properties of composites, converted them to one of the favorable materials in a wide range of applications.
In the production lines of this industry, sandwich composites are becoming a preferred alternative to metals, because of their superior mechanical properties.
Composite Sandwich Joint and Its Applications A structural sandwich is a special form of composite which is combination of different materials that are bonded to use the properties of each component and provide structural advantage for the whole assembly.
The structure in passenger aircraft and especially components inside the cabin involved different types of composite materials where requests are not only high stiffness to weight ratio but also fire safety properties is an important factor.
Ashby, Cellular solids: structure and properties, Cambridge University Press, 1999

Experimental Study on Nano-TiAlN Coated Carbide Tools in Turning Austenitic Stainless Steel Haidong Yang1,a, Zhi Ding1,b 1School of mechanical and automotive engineering, Hefei University of Technology, Hefei 230009, China ayhdsky@sina.com, btodddz@163.com Key words: Nano-TiAlN coating; 0Cr18Ni9 ; tool life; wear mechanism.
These problems have affected the production efficiency seriously, increased the processing costs, so, how to improve the cutting efficiency of this material is is very important and very meaningful.
These factors will cause the tip at high cutting temperature, chip adhesion edge serious, prone to bue tumors, not only accelerated the tool wear, and also affect the surface roughness.
In addition, because the chip is not easy to curl and break, which can damage the machined surface, affect the workpiece quality.
Because of the material properties of austenitic stainless steel with high temperature, good wear resistance and toughness in processing, so,chemical stability (antioxidant activity) of the coated cutting tool materials has placed enormous demands.

Introduction Axial compression ratio is one of important indexes that affect the seismic performance of reinforced concrete members, the concrete column refers to design value of axial pressure and the whole cross section area of the column and design value of axial compressive strength of concrete product, the ratio of its computation formula is as follows: n=N/fcA (1) Where, N is design value of frame column axial pressure in consider of earthquake action, Fc is axial compressive strength of concrete, A is column area.
We applied the sliding support along the horizontal direction on the Model upper middle pillars, and the fixed end located the bottom of the down column, the Y direction constraints imposed on the side of the two floors which include the beams inflection point, while two side is the rest of the free surface, finally, axial force along the negative Y direction was applied on the pillars; In order to simulate the action of earthquake with the method of step by step loading, we applied quasi static displacement along the X negative direction; In order to study the mechanical properties of node under axial pressure ratio（0.2, 0.4, 0.6）, We analyzed the model of seismic force performance of carbon fiber reinforced nodes and ordinary nodes under three kinds of axial compression ratio.
Conclusions The axial compression ratio is one of the important factors affecting the ductility of the carbon fiber reinforced column, The ductility of node will be improved when reinforced, when the axial compression ratio is small, The ductility of column increase obviously; and when nodes at the end of column have been reinforced by carbon fiber, The bearing capacity of the columns will increase, the bigger the axial compression ratio become, The greater the bearing capacity of column increase relatively larger, Strong column weak beam effect is remarkable.

Discrete element method (DEM) is a kind of numerical method developed in the 1970s, which is calculated for granular media mechanical behavior [4].
Simulation experiment Dry sand filling process is related to vibration parameters, shape of flask, buried depth and a number of factors, the law of dry sand filling process under different vibration form was studied by using three dimensional DEM in this article, and by investigating dry sand filling number and the motion flow pattern of sand group to study sand group motion characteristics.
But affected by gravity, Z acceleration produced by Z vibration needs to overcome the influence of gravity, thus reduce the filling performance of Z vibration.
(3) Sand group filling motion is also affected by the tube wall, the vibration perpendicular to the tube wall can make the movement of sand group more intense.
Tan, et al: Properties of Sand Filling and Compaction in Pattern Cavity of Horizontal Varied Section on EPC[J].

Table 1 lists the physical property of micro V-groove materials used.
Stress from unmatched CTE can be an important factor affecting the performance and reliability of optoelectronic device.
Stress from unmatched CTE can be an important factor affecting the performance and reliability of optoelectronic device.
Material will be fracture damage when affordable load exceeds elastic limit, and affects surface quality and devices performances.
Furthermore, the distribution (homogeneity and height) of the wear particles and bond will affect the machining quality.

By using this material, the engineering properties of soil can be improved.
This mixture has a complex treatment that is usually affected by some parameters such as cement content (C.C), the physio-chemical properties of the soil, and the porosity and moisture content at the time of compaction [1-4].
The dimension and shape of the foundation are also effective factors in determining the settlement.
The soil and foundation material properties are listed in Table 1.
Table 1 Material properties used in FE analyses.

Tailings disposal methods are affected by the topographic and geologic conditions, physical and mechanical properties of tailings, the state environmental control standards and many other factors.
And mold bag full of consolidated tailings has more superior mechanical strength than tailings dam formed through natural consolidation.
Downstream construction, mechanical placing and compaction were well developed on the basis of technology accumulation from the last three generations.
(2)Thickened tailings method is suitable or not for a mining is mostly impacted by the site specific factors.

Their poor mechanical properties seriously affected their practical application [1].
Conversion rate used in experiments on the polymerization reaction products was analyzed as a target in order to identify the three factors, modified aerogels/styrene, alcohol-water ratio and PVP K-30, on the impact of styrene monomer conversion rate.
Fig. 3 TEM photos of different ultrasonic time (a-0min, b-10min, c-20min) As shown in Fig. 3(a), by only mechanical mixing its polymerization produces compound microballoons, where the monodispersity of the microballoons was poor, the severe superimposition appeared and the single granule can not be identified.