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There are many factors which affect WEDM-HS quality and efficiency,such as pulse power supply parameters, including peak current, pulse spacing, pulse width, and the open-circuit voltage and discharge waveforms; and tool electrode parameters, including the wire electrode diameter, tensile strength, and yarn tension, etc.
In addition, there are concerned with the process system factors, including wire feed speed, working fluid, mechanical wear, liquid pressure, clamping means, etc[1-2].
Entropy weight fuzzy evaluation From comprehensive evaluation of mechanical processing,the method that many factors one by one are analyzed affect evaluation accuracy.
Entropy was used for fuzzy evaluation, which can effectively solve uncertainty problem in fuzzy factors.
Influence of material properties on machining quality in quick-speed wire_shifting edm[J].Die and Mould Industry, 2006,32(5):61-63

The assembly of proton exchange membrane fuel cell (PEMFC) is the important factor for the performance.
The amount of the assembly pressure depends on the shape of geometry, the dimension and the mechanical property.
All the component must be defined the mechanical property.
The mechanical property of components is assumed as isotropic material.
From the mechanical property, the characteristic of material will be known to investigate fuel cell behavior.

The characteristics and influence factors of µLSP were briefly introduced, and progress in µLSP research fields was reviewed and presented, including laser induced shock pressure, material constitutive relation, changes of mechanical properties and microstructure evolution of materials.
Practically, the success of the study of µLSP will provide effective and flexible technique for mechanical property modification of metallic structures in microsystems.
Influence Factors of µLSP Laser parameters, process conditions and material features are the most important influence factors in µLSP, in addition, micro-size effects in micro-plastic deformation also have a significant impact on the process of µLSP.
In this way, many properties of material are greatly different from that at macroscopic, the target material must be considered as anisotropic and inhomogeneous [6-8]. 2) Material features.
Fig.3 Sample geometry and laser shock peening condition[5] To quantitatively characterize the material properties, samples treated by µLSP were tested and analyzed from the macroscopic and microscopic, respectively.

A differential form is required, as the resin undergoes important evolutions of its properties during the cure, that strongly affect the development of residual stresses.
In order to precisely describe those evolutions, the mechanical properties of the M61 resin were investigated.
This conversion degree is a state variable, and can be used for identifying the mechanical properties of the resin.
The gelation point is denoted by a marked gap of some properties.
The choice of a model or another mainly affects the out-of-plane properties, but also the in-plane stiffness; the EKSC model results in a more rigid material than the MTres model, but less rigid than the MTfib model.

Numerical Study of Welding Sequence on the Residual Stress Field in a Thick-walled Tee Joint Wei Jiang1, a 1School of Mechanical Engineering, Dalian University of Technology, Dalian, China ajiangwei@dlut.edu.cn Keywords: Welding sequence, Residual stress, Multipass welding, Tee joint Abstract.
Finite element simulation is an efficient method for studying factors affecting weld-induced residual stress distributions.
It is found that welding sequence did not have a significant influence on the distribution pattern of the longitudinal residual stress; however, it did affect the peak values.
Fig. 1 FE model of a thick welded piping intersection Fig. 2 Temperature dependent material properties A total of six passes was assumed to fabricate the tee joint.
Temperature-dependent thermal and mechanical properties, which were assumed to be the same for both the base and weld materials, up to melting point, are shown in Fig.2[6].

Study on the Crack Extension Properties under Ultrasonic Vibration Uniaxial Tensile Load Xueli Cheng1, a, Changliu Tian2,b 12Henan Mechanical and Electrical Engineering College, Xinxiang, 453002, China achengxueli2005@126.com, btianchangliu@126.com Keywords: crack extension; ultrasonic vibration; uniaxial tension; fatigue loading.
As a result, in the process of the design and verification of these components, we must know the mechanical properties of component materials in such a case, including the properties of crack extension [1].
The specimen, in order to study the material's crack extension properties, is designed that the both ends are square board, the middle is index profile, and single side opened a gap, it is easy to crack up and extension positioning tracking of the crack, as is shown in Fig. 2.
Study on the Crack Extension Properties under Ultrasonic Vibration Uniaxial Tensile Load The Crack Extension Mechanism.
References [1] Jun Qin, in: Study on mechanical property of 20# steel under ultrasonic vibration simple tension, [Master's degree thesis ], Henan：Henan Polytechnic University, (2005), In Chinese

Nowadays, carbon fiber reinforced plastics (CFRP) composites is widely used in the aerospace industry due to its excellent mechanical properties.
The factors and their levels are given in Table 1 and also presents the results indicating the effect of pulse energy (A), pulse repetition rate (B), pulse duration (C) and cutting speed (D) on kerf width, heat affected zone and taper angle.
The perturbation plots for the coded values of the process factors and their influence on the top kerf width are showed in Figure 3.
The relationship of these factors is given in the Figure 4.
Whereas, for the bottom kerf width the significant factors are cutting speed and pulse energy.

The contributions of fault dip angle and base disturbance to critical factors are further analyzed.
Generally speaking, fault activation is affected by various factors, in which the fault dip angle is one of the main cause [4,5].
Simulation of fault activation Faults not only changed the base plate of the mechanical properties, reducing its strength and modulus of deformation, but also seriously affect the bottom water proof properties.
Dynamics of systems of seepage flow in surrounding rock affected by mining[M].
Research on mechanical mechanism of fault activation and water inrush from faults in mining floor [D].

The effects of amount of wood fiber on mechanical properties, brittleness, flame-retardant, insulation and microscopic structures of wood fiber-MUF foam were investigated.
Results indicated that the flame-retardant properties increased, and the brittleness and mechanical properties decreased with the increase of the amount of wood fiber in composite foams.
Properties Methods.
Table 1 showed the relationship between amount of wood fiber and the mechanical properties of the foams.
Table 1 Mechanical properties of the foams Content of wood fiber (wt.%) 0 5 10 15 20 Compression properties (MPa) 0.5234 0.5343 0.3865 0.3150 0.2450 Bending properties (MPa) 0.6395 0.6848 0.4848 0.4770 0.3800 Fragile Properties.

Addition of fibers in cementitious materials may enhance its mechanical properties, particularly tensile strength, and ductility.
This project is aimed to evaluate the mechanical properties of fiber cementitious materials which comprise fibers and silica fume in the mixes.
Results and Discussion Strength Properties.
TNevertheless, Pearson coefficient only measured the effect of single variable on mechanical properties.
The interaction between each variable on mechanical properties required some further explanations by analysis of variable.