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First, sample with residual stress of shot peening were detected, material properties change with residual stress was analyzed.
Material Characteristics of Cold Deformation Strengthening In order to facilitate the discussion, focuses on the properties of the materials after shot peening.
Changes in Material Properties.
After the shot peening treatment, the material properties of the surface layer material is defferent with the material properties of the core material.
The shot peening residual stresses affects the size of the mean stress, the size of the mean stress also affects the size of the fatigue strength[1].

Now the solution remesh, but it will seriously affect the accuracy of calculation [2]. 
Tab. 1 The material properties Name Tensile strength（MPa） Elastic modulus（GPa） Poisson's ratio Shear modulus（GPa） GCr15 δb=1617 E=207 μ=0.29 G=80.23 Simulation setup This study used Ansys Workbench and LS-DYNA software for simulation. 
The influence factors on the influence of EFGM.
Tab. 3 The simulation data of different Influence factors Influence factors 1.01 1.2 1.3 Diameter（mm） 20.17 20.2 20.22 Distance（mm） 21.3 20.9 20.6 Band width（mm） 0.7 0.7 0.6 Band thickness（mm） 1.9 1.9 1.7 Computation time (h) 13 16 20 At the time of changing the Influence factors of numerical, the simulation data of the ball will change.
But as shown in table.3, improved the Influence factors; calculation time was greatly improved, so at the time of simulation using EFGM, it was important to select suitable influence factors.

The external factors create the overlap of the wave functions of trapped electrons (that are injected from metallic or semiconductive electrode) in the polymer layer and so the insulator-metal phase transition becomes possible.
Overcoming such barriers may provide external factors: normal mechanical pressure, electric field, magnetic field and so on.
Let us consider the effect of external factors used in the present work.
Normal mechanical pressure affects the magnitude of the potential barrier.
Each of these factors alone can create a narrow zone and provide the charge transport independently [7].

The influence of the Co addition and synthesis route on desorption properties of MgH2 were investigated.
These properties make hydrogen a potential fuel for energy consumption but the major problem that has to be solved is the way of hydrogen storage.
Powerful ways of improving the hydrogen sorption properties are high-energy ball milling of hydrides with a suitable catalyst.
Recently, Bobet et al. have tried to improve the H2-sorption properties of Mg by reactive mechanical milling with Co and CoO.
We examined the combined effect of the following factors: milling intensity, amount of catalyst, degree of homogenisation, and particle size of Co, on the hydrogen desorption properties.

By using Computational Fluid Dynamics software to simulate and optimize the various parameters which affect the efficiency of the rotor.
Compared with the horizontal axis wind turbines (HAWT), it has the property of simple structure, omnidirectional for wind, low cost and higher rotary torque.
The appropriate value of α must consider these two factors.
As the radius of the wind wheel is settled, the impact of R/r on the Cp is actually equal with rectifier diameter affect Cp.
Savonius: Mechanical Engineering Vol.53(5) (1931),p.333-340 [3] W.

This paper based on the observation data of ground surface settlement of long double line highway tunnel, and combined with FLAC_3D simulation analysis complex mechanical behavior of tunnel excavation process [3].
Analysis the process of excavation of tunnel caused by deformation property and the influencing factors and provide valuable scientific basis for the channel design and construction.
Mechanical model is shown in Fig.3 and Initial stress contour is shown in Fig.4 Fig.3 Mechanical model Fig.4 Initial stress contour The numerical simulation steps
(3) Induct the model data into FLAC_3D program and the model material properties are given by FLAC_3D procedures.
Conclusion The measuring data of the field and numerical simulation show that the final ground surface settlement curve show bimodal distribution and it appear asymmetric affected terrain and tunnel excavation time.

The fracture-mechanical parameter values of concrete, a quasi-brittle composite material, are determined via evaluation of records of experiments on specimens with stress concentrators.
This model combines the concept of cohesive forces acting on the effective crack increment with a criterion based on the stress intensity factor.
Even relatively small volume quantities of these fibres in concrete mixture can affect the resistance of the composite to crack propagation.
Results The relative mean values of selected material properties (compressive strength fc, modulus of elasticity E, effective crack elongation ac – a0, unstable fracture toughness KIcun, and ratio KIcini/KIcun) are introduces in Table 1 (normal weight concrete) and Table 2 (lightweight concrete): the 100% value for each material parameter represents the values of those parameters for the reference concrete without fibres OB_REF respectively LB_REF.
In Table 3 the same parameters are introduced, but the 100% value represents the value of material properties for normal weight concrete.

In these regions, the main form of old goaf overburden rock activation is rock- structure instability caused by suffering external force and extrinsic factors and the resulting compaction of cracks and separation .
Thus, sliding instability depends on the mechanical properties of key block and neighboring block, the value of W/T and the size of additional load such as surface structures Rotational instability of the key rock.With the rotary of the first rock, horizontal thrust T increases leading to the breaking and instability of the corner blocks, which is manifested as rotary-deformation instability.
Equation (5) shows that, the main factors that affect the size of the rotary angle are thickness and length of rock( is equivalent to the fracture step of the original top in mining process, and is equivalent to once caving thickness of the original top or the thickness of a certain overlying hard rock.)
Thus, rotary instability relate with the mechanical properties of key block and neighboring block and the thickness-length ratio h / l of the exposed hanging block .
From mechanical analysis of masonry beam structure important conclusions are obtained that : sliding instability depends primarily on the mechanical properties of key block and neighboring block, the value of W/T and the size of additional load such as surface structures, and rotary instability relate with the mechanical properties of key block and neighboring block and the thickness-length ratio h / l of the exposed hanging block.

The temperature rise can decrease the mechanical properties of rubber, intensify the tread wear and lead to scrapped in advance [3].
The range of per unit gives the ranges of different factors at the same range of variation.
Summary (1) An orthogonal test of three factors was carried in this paper.
Factors That Affect the Fatigue Life of Rubber: A Literature Survey [J].
Experimental Study of Natural Rubber Mechanical Property in Variable Temperature Fields [J].

Failure property and cause were determined by macro and micro observation, EDS analysis, metallographic examination and hardness testing, which can provide reference to prevent re-occurrence of such failure.
Therefore, bearings’ fracture properties were stress corrosion cracking. 3.2 Failure process and cause Stress corrosion cracking is brittle fracture, which caused by synergistic effect of tensile stress and particular corrosive environment [6].
Tendency to stress corrosion, static tensile stress and specific corrosive media are the three fundamental factors of the stress corrosion failure [7].
Bearing plate can be seen as simply supported at the bolted double pivot axis beam, bearing plate subjected to bending stress, which provided stress factor.
Cast loose is the main factor affecting the reliability of aluminum castings component [8], which reduces mechanical properties, chemical properties and physical tightness, while the impact toughness and elongation are also greatly degraded [9,10].