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The end surface angle of workpece is one of key factors that affect burr sizes and shapes.
Recently years, foreign engineers and scholars of mechanical engineering attach more and more importance to the mechanism of burr formation, influence factors, the controlling method, deburring technology and others[1,2,3].The formation of burr is a complicated process.
There are many factors affect burr shapes and sizes , but the support rigidity of the end face of workpiece is a main factor which affects negative shear angle and shear strain，furthermore, affects burr shapes and sizes.
It has very high strength and favorable machinability But the burr/fracture directly affects the edge quality of workpiece, it is very necessary to study the mechanisms of burr/fracture formation and effect factors systematically in order to gain better edge quality in high-speed machining.
Conclusion The end surface angle is one of key factors that affect burr shapes and sizes, In this paper, a finite element method of a metal-cutting process including burr/fracture formation has been presented.

Influencing Factors of Phytic Acid Conversion Coating on AZ91 Magnesium Alloy Yanling Lu a , Yankun Chen b, Shiguo Du, Yi Guo, Qing Hong Mechanical Engineering College, Shijiazhuang, Hebei, 050003, China aLuylrp01@yahoo.com.cn, bcyk19860110@163.com Key words: magnesium alloy; phytic acid; conversion coating; corrosion resistance Abstract.
But development and application[3-5] of magnesium alloy are limited to a large extent since chemical properties of magnesium alloy are too active, and its corrosion resistance is quite poor.
Result and discussion Importance of phytic acid conversion coating influence factors Known from the above documents, the major factors affecting the phytic acid conversion coating forming include conversion solution pH value, concentration of phytic acid, coating forming time and temperature.
Table1 Factors and levels of orthogonal experiments Factors Levels A Conversion solution pH value B Phytic concentration (ml/L) C Coating forming time (min) D Coating forming temperature (˚C) 1 4 5 5 20 2 6 15 15 30 3 8 25 25 40 4 10 35 35 50 Based on the above four factors and four levels of each factor, L16(44) orthogonal experiment table is drawn.
It is shown by the orthogonal experiments that the order of importance of the four factors affecting the corrosion resistance is conversion solution pH value> concentration of phytic acid >coating forming time > coating forming temperature.

The composition of these alloys is often a key factor to control the mechanical, chemical and physical properties of the synthesized alloys.
The construction industry might accommodate broad applications of nanotechnology because of high surface activity and enormous mechanical properties of nanomaterials.
It was found that grain size is a key microstructural factor affecting physical and mechanical properties of the materials [3-4].
Both approaches are suited to produce submicron grain structures with attractive mechanical properties [2].
These metallic particles are characterized by unique physical and mechanical properties.

CFD (Computational Fluid Dynamics) software was applied to analyze the major influencing factors of the robot’s mechanical properties.
Combining these simulation data with the derivation process of Resistive Force Theory, the models for the mechanical properties simulation of the swimming robot were revised, and the explicit empirical formula of propulsive force is obtained.
Therefore, in this paper, a series of parameters which impact on the propulsion including the helix tail's structure and operating environment factors are simulated with Fluent.
Simulation results show that, the thrust produced by the rectangular cross-section one is 30% larger than the circular cross-section one when all other factors are the same.
This figure shows that, μ affects both and T// .

The flexural property was analyzed.
The local stability of flange plate is one of the main factors that affect the overall bending capacity of GFRP I-beams.
Reference [1] Zhang Yulong, Handbook of advanced Composite Manufacturing Technology, Mechanical Industry Publishing House, Beijing, 2003, in chinese
[2] Lu Yun, Zhu Shijie, Advanced Composite Materials, Mechanical industry publishing house, Beijing, 2004, in chinese
[4] Zhang wei, Zhang Ming-yi, Gao Li-tang, Experimental Study on the Mechnical Properties of Composite Middle Beam in Foundation Pit Support, J.

For mechanical properties of MMCs to large extent depend on the reinforcement/matrix interface adhesion, which mainly determined by processing conditions, how to select a suitable processing route and detailed processing parameters to achieve strong interface bonding strength, hence satisfactory mechanical properties is a great concern in this field.
Microstructures and mechanical properties of the obtained MMCs were investigated. 2.
Experimental Methods Microstructure observation and mechanical properties test were performed on the SSF/Al composites specimens to study the effect of processing conditions.
Tensile Properties Tensile test was conducted on A-4S-B and A-8S-B.
(3) High strength reinforcement and strong interface adhesion are two indispensable factors for enhancing the strength of SSF/Al composites.

Experimental Study on Adsorption Capacity of Natural Gas Odorant Tetrahydrothiophene in Soil and Relevant Influencing Factors Xie Yushu1, a *, Dan Mo1, b, Song Bingxue1, c and Yao Wei1, d 1 Beijing Municipal Institute of Labour Protection, No.55 Taoranting Road, Xicheng District, Beijing P.
China axieyushubj@163.com, bdanmo2001@126.com, csnow801224@163.com, dyw777yw@163.com Keywords: tetrahydrothiophene, soil, adsorption capacity, influencing factors Abstract.
The impact of four parameters (namely gas leakage, water content, particle size and texture of the soil) on the adsorption properties of soil was then quantitatively analyzed.
Many factors affect the adsorption by soil organic matter, including physical and chemical properties of organic matter, soil water content, organic carbon content, specific surface area, pore size distribution, and external factors (such as soil temperature, salinity).
This may be because the mechanical structure of the soil was serious damaged in the process of grinding.

Based on the results it is determined that the sequence of factors affecting radial strain corresponds to geometry of spun part, mandrel speed, planar anisotropy of the sheet.
Very significant feature of spinning is ability to produce components with high mechanical properties and smooth surface finish.
Although knowledge about the instant stresses, accumulated strains and damage evolution, which help to understand final properties of spun parts, have been developed by systematic investigation of the process using both experimental and theoretical techniques [3 and other], several gaps still exist in the knowledge of spinning mechanics, mechanical and structural properties of surface and sub-surface layers of spun parts (residual stresses, microstructure) and more information we need for precise prediction of workpiece material and geometry influence on strains distribution, too [2].
Chosen basic mechanical properties and facilities defining material plasticity (ultimate tensile strength (Rm), 0,2% offset yield strength (Rp0,2), elongation (A5), medium value of normal anisotropy (rs), planar anisotropy (D r) and strain-hardening coefficient (n)) are listed in Table 2.
L27 array has a possibility to assess the main effects of three parameters and two factors interactions, too.

The results showed that the properties of NBR are less affected than other elastomers.
In addition to the factors presented, there are technological aspects that involve the use of biodiesel.
One of these factors is the influence of these fuels on the materials properties, especially those materials used in the automotive industry.
The evaluation of tensile mechanical properties shows that 7 or 14 immersion days were sufficient to determine the changing trends in this property.
Fig. 3: Mechanical properties of aged composites in B5 blend renewed for each 7 days cycle and without replacement of the B5 blend.

The Properties and Structure Stability of Martensite-Bainite Dual Phase Structure in Bearing Steel Lei Tian1,3,a, Guanhong Kong2, Xueying Cui1,3, Rui Feng1,3, Shengli LI1,3,b 1School of Materials Science and Engineering, Shandong University, Jinan 250061, China 2Science and Technology Quality Department, Jinan Iron and Steel Group, Jinan 250101, China 3Shandong Province Engineering Research Center of Large Size Alloy Structural Steel Bars atianleisdu@163.com, blishengli@sdu.edu.cn *corresponding author Keywords: martensite-bainite dual phase structure; structure stability; mechanical properties; temper resistance Abstract.
The Martensite-Bainite(M/B) dual phase structure has excellent combined processing properties which can be applied to the bearing steel.
The test of mechanical properties include wear-resistance and impact toughness.
The mixing of the hard phase and the soft phase, also affect the wear resistance.
The conclusions are as following: M/B dual-phase structure of G55SiMoV mill bearing steel has excellent mechanical properties than single phase martensite.