Search results

This paper aims at using the analysis hierarchy process to establish the factors affecting machine tool selection.
"Factors set" is a set to evaluate object properties; "weights set" is a matrix to express the heavy of the factors in the evaluation set; "judge set" is a set consists of evaluation results.
According to the fuzzy comprehensive evaluation, index layer that affect the selection of machine tool constitute the first layer of influence factors set U; criterion layer constitute the second layer of influence factors set U/P [2].
The corresponding evaluation set (Suppose there are m comments): V= {v1, v2... vm}.Through building the comprehensive evaluation matrix R separately, fuzzy evaluation was carried on according to the weight set A of the affecting factors.
The system possesses the properties of good working condition, reliable operation and high feasibility of reasoning results feasible.

With cold rolling deformation between 12.5% and 60% for GH 536 superalloy strips, effect of deformation on the mechanical properties, texture formation and microstructure evolution have been investigated.
The results show that an increase of deformation will lead to an increase of mechanical properties.
Conclusions (1) Cold deformation plays a very important role on mechanical properties of GH536 superalloy strip.
Influence of deformation ratio, heat treatment system on as-cast microstructure of weld area, grain size and mechanical properties of GH536 welded tube, Journal of Iron and Steel Research. 15 (7) (2003) 433-437
Xie, Y.Zhao, Studies of mechanical properties and microstructures of argon-shielded arc welding joint of GH536 superalloy, Journal of Dalian Jiaotong University. 31 (5) (2010) 47-49

The mechanical properties have been assessed by means of tensile and high-cycle fatigue tests.
This phenomenon can affect the mechanical properties, especially fatigue.
Table 2 – Tensile Properties of Welded and Not Welded Steels In Table 2, the mechanical properties obtained from the tensile tests is shown.
[7] L.Mujica, S.Weber, H.Pinto, C.Thomy, F.Vollertsen, Microstricture and mechanical properties of laser-melded joints of TWIP and TRIP steels.
[11] Y.T.Chen, A.M.Guo, L.X.Wu, J.Zeng, P.H.Li, Microstructure and mechanical property development in the simulated heat affected zone of V treated HSLA steels.

Characterization of the Properties of Chitosan Nanoparticles (CSNPs)/PEO Nanofibrous Membranes Harini Sosiati1,a*, Ardi Surya Kusuma1,b and Krisdiyanto1,c 1Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Jl.
This study investigated the morphology and tensile properties of the CSNPs/PEO membranes affecting by varying CSNPs concentrations (0, 0.5, and 1.0 wt.%) and PEO solvents (70 and 96% ethanol).
Whatever the chitosan/PEO nanofiber membrane uses, the characterization of the fiber morphology related to the mechanical properties should at least be studied.
For instance, the tensile properties of the membrane are significant properties for either wound dressing or filter material.
The ratio of chitosan/PEO blend, chitosan or PEO's molecular weight, and type of PEO solvent are the crucial factors influencing the properties of the membrane [8–10].

There have been tremendous researches on carbon nanotubes (CNTs) and CNTs reinforced composites due to their excellent mechanical, electromagnetical and thermal properties.
In order to investigate how the aligned multi-walled CNTs affect the mechanical properties of the multi-scale composites, a representative volume element is used to simulate the multi-walled CNT pullout process by means of the finite element method.
Introduction Since the observation by Iijima in 1991[1], carbon nanotubes (CNTs) have led to a wave of discoveries in most areas of science and engineering due to their unprecedented physical and chemical properties, such as excellent mechanical, outstanding electrical and exceedingly good thermal properties[2,3].
Shi, Carbon nanotube/carbon fiber multiscale composite: influence of interfacial strength on mechanical properties, Journal of Inorganic and Organometallic Polymers and Materials. 21(2011) 937-940
Gunko, Small but strong: a review of the mechanical properties of carbon nanotube-polymer composites, Carbon. 44(2006) 1624-1652

A further comparison was made with corresponding properties of 100% wt E-glass fiber composites sample.
There are several factors that affected the properties of natural fiber products such as fibers growing environment, environment temperature, percentages of humidity and the nature of the soil or the composition of the soil.
The main concern to produce bidirectional samples are to have better mechanical properties as there are more orientations of fiber per number of layers of fabric resulted in better stress distribution.
The un-treated samples shows inconsistent trend of flexural properties.
Summary Observation on impact value shows a more consistent pattern for treated Kenaf fiber composites samples thus suggested a more control mechanical properties.

The analysis results revealed that the current was the dominant factor affecting the performance measures (62.87% for TWR and 78.82% for SR).
The combination of the properties of two or more materials produces advanced materials with low density, high strength and stiffness and excellent wear resistance as compared to conventional materials.
While Al-MMC reinforced with carbides (SiC, B4C, and TiC) the formation of unwanted aluminum carbide (Al4C3(s)) (Eq. 1) affects the properties of the Al-MMCs and Al4C3 react with the moisture or water to form aluminum hydroxide (Al (OH)3) (Eq. 2) impacting the integrity of the composites [2]
The hybridization of the Al-MMC is expected to enhance the properties of the composites.
It was found that I and Ton are the main factors that affect all the responses.

PPNC Nanocomposite Mechanical and Thermal Properties PPNC commonly demonstrate improved mechanical and materials properties, when it was compared to those of pristine polymer.
Further properties shall be highlighted here in terms of mechanical properties and thermal properties such as heat distortion temperature, thermal stability and fire retardancy.
Mechanical properties.
It was concluded that clay content is detected as the second significant factor to enhance the tensile and flexural properties.
However, clay type and maleated polypropylene (MAPP content are two non-significant factors found in this study except that MAPP content has greater influence on the impact properties of nanocomposites [9].

Equilibrium State of Football Players Affected by Disturbance Chunping Dong Jilin Agricultural University, Changchun, Jilin 130118, China dcping1974@163.com Keywords: Mechanical Balance, Stability, Mechanical Interference Abstract.
The paper use bio-mechanical principles study human balance strategies, we will first discuss the stability of the human body measurement problems, and then discuss the footballer walking process disturbed the balance of input recovery strategy, and the results of this study provide enhancements for the body to balance the theoretical support.
Introduction With the bio-mechanical research continues to depth, the use of bio-mechanical principles study of human balance strategies for human balance enhancements for theoretical support, has gradually become a cutting-edge field of rehabilitation engineering and hotspots.
Although at this time the swing foot contact with the ground yet, but soon formed a new support, in this process, if the new legs and perfect function without outside factors interfere, will be able to walk smoothly into the next step, to achieve a stable and secure walking.
Moreover, the proportion of the energy absorbed by each joint with disturbance intensity variation and the ratio of the energy produced is not consistent, but the main show complementary properties.

China 430068 ychdeng8@163.com 758152883@qq.com Keywords: gas suction turnip seed metering device, the geometric parameters, flow velocity, adsorption of distance Abstract: the gas suction turnip seed metering device is the core requirement of precise seeding, in this article, through analysis and research of the geometric parameters of radish seeds, affect the seed is obtained by means of experiment draw the related factors of seed suction nozzle, including adsorption seed when the surrounding air velocity and adsorption under a certain air needed distance, and the specific parameters of these factors were determined.
The research content of this article This paper determined with suction type precision metering device and radish seeds as analysis object, based on the research of the geometric parameters of the seed, the analysis of influence factors in the process of seed adsorption, put forward the system of theoretical research method, the main contents include: 1.The geometric parameters of radish seeds 2.Analyze the stress of seeds in the flow field 3.suction hole flow field around the dynamics characteristics radish seeds of geometric features Metering device the essence of the theory research is the analysis of the motion law of the seed, the size and the shape of geometry size, such as geometric features, are the important factors that affect seed movement, also is the basic foundation of theory of metering device design.
Figure [1] Radish seeds three axis size frequency distribution Particle size is often referred to as the average of the average particle size, the calculation method of average particle size has a lot of, this article mainly analyzes the seeds in the suction line kind of the mechanical movement in flow field, due to the size of the seeds in the flow field stress and its surface area, therefore adopted based on the average particle size of the surface of d, for computing method: （1） By measuring, the average length, width and thickness of samples were 3.03, 2.92, 2.87, calculated。
according to the analysis of the mechanical motion process of seeds Of precision design, the absorption ability is an important technical index, it mainly depends on seed in suction mouth the mechanical movement rule of air flow field, precision metering device is the emphasis and difficulty in theoretical design.
Figure [2] Suction nozzle flow field in the geometric model Table [1] Geometry size and fluid properties geometry The parameter value Fluid properties The parameter value Import cone large (small) size 0.03（0.006） density 1.2 Imported high 0.01 viscosity 1.5x Excessive zone height 0.002m Outlet pressure 0Pa Exit diameter 0.001m Inlet pressure 5KPa/10KPa/20KPa/30KPa/40KPa Export highly 0.006m Reynolds number Re 1~20x 3.1.2 Mesh to the model In the grid, in order to get more tidy, regular grid, the geometric model is divided into three parts, the upper part is divided into a rectangle, the middle is a transition area, the following is an isosceles trapezoid.