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Introduction The materials can still perform plastic deformation of micro accumulation when impact stress is only 1/10~1/3 of material yield strength under repeated impact loadings for mechanical engineering.
The chemical composition and mechanical property of austenitic stainless steel can be obtained from the ordinary deigns specifications and the chemical composition (mass fraction %, the same below) is ≤0.12C,≤1.00Si,≤2.00Mn,8.00~11.00 Ni,17.00~19.00 Cr and balance Fe.
Sketch map of repeated fatigue tester punch During the process of deformation test of low stress repeated fatigue, macro cumulative plastic deformation may result from many factors, including impact forces, repeated impact frequency and repeated impact times.
Mech.Engrs (1908),p.889 [3] Huang Mingzhi, Shi Deke and Jin Zhihao, in: Metal mechanical property, editied by Xi'an Jiaotong University Press, Xi'an (1986), p.184 [4] R.W.
Herman Hertzberger writing and Wang Ke translation in: Deformation o Engineering Material and Fracture Mechanics, editied by Beijing aerospace Press, Beijing(1998) , p. 312 [5] Wu Guoxun, in :Engineering plastic mechanics, editied by House of Beijing University of Aeronautics and Astronautics Press, Beijing (1998) , p. 27 [6] Fu Geyan, in: Research on Repeated Impact Fatigue of Laser Coating Parts Submitted to Doctoral dissertation (2004), p. 7-8 [7] Ha Kuanfu, in: Microscopic Theory of Metal Mechanical Property, editied by Science Press, Beijing (1983), p. 506

If the stresses and deformation of a pile exceed the allowable values, that will affect its normal use and even result in its damage.
Therefore, base on a practical engineering in Shanghai, some factors such as the distances between a pile and a tunnel, the concrete strength of a pile are investigated using finite diffrence method.
To analysis the spacing, concrete strength grade sensitively, in order to research the impact clear spacing between pile and tunnel and the concrete strength grade on mechanical and deformation properties of pile, Specific conditions are as follows: (1) remain unchanged the pile of concrete strength and other parameters, the clear spacing have 1m, 2m, 3m, 4m, 5m five conditions between the tunnel of right side and pile, research the spacing impact on the pile foundation performance; (2) remain unchanged the clear spacing between the tunnel of right side and pile the and other parameters, to take of C15, C20, C25, C30, C35, research concrete strength grade impact on the performance of the pile foundation.

It has two features: one is that magnetic fluid contains magnetic particles in the fluid kept doing Brownian motion, solid-liquid separation will not occur even in gravity, magnetic, centrifugal force; the other hand, being super magnetic liquids in external magnetic field, magnetic fluid has a corresponding magnetic properties, viscosity, rheology, birefringence and other unique properties for special applications [3].
In this paper, relevant parameters of the magnetic fluid that affect vibration attenuation of the magnetic fluid damper are researched, including volume and saturation magnetization of magnetic fluid.
The shape and properties of permanent magnet not only affect the ability of self-suspension of magnetic fluid within the damper, but also determine the distribution of the magnetic field.
Wang, A study on manufacture and property of MRF, Journal of Functional Materials.
Liu, Factor analysis based on the principle of magnetic liquid second-order buoyancy in magnetic inertial sensor.

In particular, several factors could adversely affect the desired results, such as the mechanism of joint assembly, fabrication tolerance of adherents and curing method.
In this project, tensile test was carried to identify the mechanical properties of an tubular adhesive joint such as maximum shear strength.
Joining techniques for aluminium spaceframes used in automobiles Part II - adhesive bonding and mechanical fasteners.

Low Velocity Impact Response of Composite/Sandwich Structures Akshaj Kumar V1, a *, P Surya1,b and MK Pandit1,c 1School of Mechanical Sciences, IIT Bhubaneswar, Bhubaneswar, 751013, India aakv12@iitbbs.ac.in, bps14@iitbbs.ac.in, cmihir@iitbbs.ac.in Keywords: Dent resistance, Mild steel, HDPE, LDPE, Polypropylene, Porous PU foam Abstract.
Sandwich structures are lightweight and exhibit the same strength properties as the conventional materials.
Dent resistance is affected by many factors and it is dependent on yield strength as observed by Shi et al. [2].
Zhigang, A research progress of dent resistance for automobile body panels, Chinese Journal of Mechanical Engineering.

Cutters Plane Layout Design of the Full-Face Rock Tunnel Boring Machine (TBM) Based on Multi-spiral Layout Pattern Junzhou Huo1, a, Haifeng Zhao2,a, Xu Zhang1,c , Wei Sun1,b, Yu Zhao2,b 1 School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, P.R.
Optimizing the layout of the cutters is the most effective way to improve the global performance of a TBM[1], and directly affects TBM’s boring performance, service life, main bearing of the cutter head, the degree of the vibration and noise.
The CSM computer model[2] for hard rock TBMs is based on the cutter head profile and rock properties.
So based on Eq., if the factor and the initial angle of the spirals are determined, the position angle can be determined by Eq..
Journal of Mechanical Science and Technology, 24(2010), p.521

Xie 1,d 1 School of Mechanical & Electrical Engineering, Suzhou University of Science &Technology, Suzhou 215011, China 2 Department of Basic Courses, Global Institute of Software Technology, Suzhou 215163, China a yinzhen12@mail.usts.edu.cn, blih_haut@sohu.com, c158815035@qq.com, d xieou@126.com Keywords: FEM, Ultrasonic, Vibration, Internal Grinding, Simulation Abstract.
In the structure on the vibrator formerly used, the transducer, horn and tool are designed separately based on the mechanical vibration theory according to predetermined frequency, and then the three are connected.
The workload of design, manufacturing and amending is very heavy, and the method is difficult to achieve the whole resonant, so the problems affected the development of its industrial application [1-4].
Modal analysis is used to dope out the vibration characteristics of the vibrator system, natural frequencies and vibration mode of the vibrator are the important properties in ultrasonic vibration system [7].
The vibration amplitude of abrasive wheel is one of the primary performance factors in the process of UVG, The vibration frequency, amplitude and the mode on the wheel's end and flange have been tested by using the PSV-400 laser Doppler vibrometer (Fig.12).

Udayakumar1,b, Sah Md Fahim Anwar1,c Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, TamilNadu, India, Pincode-620015 E-mail: avmari@nitt.edu, bmuday@nitt.edu, cmdfahimanwar@gmail.com Keywords: VAR system, Thermodynamic, COP, exergetic efficiency, Thermoeconomic, R134a-DMAC Abstract This study focuses on the analysis of Tetrafluoroethane-Dimethylacetamide (R134a-DMAC) VAR system based on both thermodynamic and economic point of view and optimal operating parameter are proposed.
In thermodynamic analysis mass flow rates, temperature, pressure, enthalpy, mass fraction and exergy of various state points are determined and based on the above state point properties the system COP and exergetic efficiency are calculated.
(2) The chemical exergy component is associated with the work obtainable in bringing a stream of matter from the state that is in thermal and mechanical equilibrium with the environment to a state of that stream of matter that is in the most stable configuration in equilibrium with the environment
The factor that affects the strong solution mass flow rate is the density of the fluid, which is function of temperature.
Based on the dominance of these two factors, the trend of the graph is as described.

Effects of Varying Boundary Conditions on the Buried Pipelines Ouk Sub Lee1,a,∗ and Dong Hyeok Kim2,b 1 School of Mechanical Engineering, InHa University, Incheon, 402-751, Korea 2 Department of Mechanical Engineering, InHa University, Incheon, 402-751, Korea a leeos@inha.ac.kr, bkdonghyeok77@yahoo.co.kr Keywords: Reliability Estimation, Probability of Failure, FORM (first order reliability method), Buried Pipeline, Corrosion, Boundary Condition.
Furthermore, the effects of distribution types of random variables affecting the strength of buried pipelines on the probability of failure and the reliability of the buried pipeline are systematically investigated.
There are several parameters that may affect corrosion and the reliability of pipelines.
However, because the protective properties like oxides are improved as the corrosion proceeds, the corrosion rate over time is reduced [13].
The Weibull distribution is commonly used to describe material strengths and time to failure of electronic and mechanical devices and components.

The welding process produces a large microstructural gradient through the weld, resulting in strong variation of mechanical properties, for details see [1].
Parameter K defines the slope of a sudden drop of the load on the load-diameter reduction diagram and is often referred to as 'accelerating factor'.
The mechanical properties of the materials (BM, UM and OM welds) were determined on round tensile (RT) specimens with initial diameter of 5 mm (see Table 1).
Table 1 Mechanical properties of base metal and weld metals (OM and UM) at room temperature.
Initial value of void volume fraction f0 = 0.002 was adopted according to microstructural observations and recommendations for steel of similar properties given in [11-13].