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With mining depth increasing, the mechanical properties of coal reservoirs and the gas migration rule are affected and changed under the effect of factors such as stress, temperature.
Therefore, exploring deformation of coal containing gas and the gas migration law under the factors such as temperature, stress has great scientific value and practical significance.
Yin Guangzhi [3] carried out the whole the stress and strain of triaxial stress thermal-hydrological-mechanical coal gas experiment using electronic precision testing machine and homemade coal rock triaxial creep gas seepage.
Experimental research on the impact of temperature on the mechanical properties of coal[J].
Experimental research on gas flow properties of coal specimens in complete stressstrain process [J].

However, the inherent degradability of these additives lowers the mechanical properties of the blend and results to accelerated and uncontrolled degradation of PE film.
Results and Discussion Tensile Properties.
ANOVA shows that all factors significantly affect the tensile strength of exposed films.
Fig. 2(b) shows the effect of factors on CI of LDPE films after 1008 h of thermal aging.
Based from ANOVA, all three factors do not significantly affect the CI of films.

Among the innumerous combinations studied, addition of particulate and short fiber ceramic reinforcement to an aluminum alloy matrix has obtained good results, with improvements in tensile strength for SiCp [1,2] and in tribological characteristics for carbon [3], and has great potential nano carbon for improving electrical and mechanical properties in composites [4].
The stirring conditions (position, speed, temperature) and the size of the reinforcement play an important role in the final characteristics of the composite [9], as the turbulence provided by the paddle is responsible for the rupture of the dendritic arms, affecting the fluid viscosity, and still, the dispersion of reinforcement becomes difficult as the particulate size decreases [10].
Besides, stirring speed of 1500rpm was enough to disperse CNF through the A356 matrix, but it had to be raised up to 2500 rpm to properly mix the SiC particles, due to increase in the viscosity of the slurry occurring during the process; z Keeping the solid fraction of the metal slurry between 10% and 20% during stirring is an important factor as it affects the dispersion of the reinforcement through the matrix, especially in the case of CNF.
Rozak, Effects of Processing on the Properties of Aluminum and Magnesium Matrix Composites (UMI, Ohio, 1993). 2.
Tanabe et al., in Proceedings: Material Processing for Properties and Performance.

The gel properties of collagen solution determines its superior adhesivity.
The modification method can improve greatly the anti-bending, water resistance and other comprehensive physical and chemical properties of collagen membrane[2,3].
On the physico-chemical and dielectric properties of glutaraldehyde crosslinked galactomannan-collagen films: Carbohydrate Polymers.
Effect of the particle size in dispersions on the properties of waterborne polyurethane/casein composites: Ind.
Structure and properties of polyacrylate resin-b-poly (glycidyl methacrylate) self-crosslinking copolymer: Fine Chemicals.

Due to its excellent mechanical properties, such as high stiffness-to-density and high strength-to-density ratios, AA6082 is suitable for structural sheet-metal fabrications [1].
A novel process, solution Heat treatment, Forming and in-die Quenching (HFQ®) has demonstrated its advantages in the forming of AA6082 TWBs with improved formability, as it could eliminate the welding effects and restore the mechanical properties of the welding zone [3].
The model makes use of a non-homogeneity coefficient, or imperfect factor, which accounts for the initial discrepancy in the thickness.
Since HFQ® forming technique could eliminate the welding effects and restore the mechanical properties of the welding zone, no special consideration was taken for the weld zone and the weld line mesh was set to the same as that of base material.
Dean, Size-dependent mechanical properties in AA6082 tailor welded specimens, J.

Conversion factors, which are calibrated for each different recipe, are used for comparison of tests.
Dogbone specimen, mechanical fixation.
The values of strengths and conversion factors after macrocracking are shown in Table 3.
The unambiguous trend of dependence of the conversion factors on material strain was not observed.
Tipka, Tensile Properties of Structural Fibre Reinforced Concrete, Ph.D.

The power cables will be aging under the influence of electric, heat, machinery and so on after being put into operation, it will decrease the electric and mechanical properties of insulating materials so that it will affect the normal power supply when serious fault occurs.
Mechanical damage.
Cable faults caused by mechanical damage make up a high proportion of cable accidents.
The main causes of mechanical damage contain damage of installation, external forcewhen running, motions by the moving vehicle and the natural factors etc.
Cable moistened.The connection seal is lax or the installation of non-performing lead to flooding, there are water or bubbles in insulation layer generated from a bad manufacturing, the metal sheath has pores and cracks or it is stabbed and corroded, these factors can all make the cable moistened.

Mechanical model of the train.
Accordingly, there are developed certain longitudinal compression and tensile in-train forces, causing stress to the couplers and affecting passengers comfort.
Main parameters Mechanical aspects.
According to the particular constructive and operational characteristics, the behaviour of buffer and draw-gear devices is quite complex due to several non linear phenomena like variable stiffness-damping, hysteretic properties, preloads of elastic elements, draw-gear compliance, clearance between the buffers discs, etc.
In addition, the consequent shocks may affect passengers comfort.

The main cause of the failures has been determined as the wearing-out of the shoe surface, and the parameters that most sensitively affect life have been reported to be pressure, speed, temperature, contamination and others 1) .
However, a combined accelerated life test model taking other factors such as speed and temperature into consideration has not yet been developed.
      = −− kT E VPt A n m n T f exp φ (4) G 2.2.3 Accelerated Factor Generally, the AF (Acceleration Factor) of the test is expressed as Eq.(5). )( )( testt fieldt AF f f = (5) When the failure time is substituted into the acceleration factor, it is as shown in Eq.(6), and when it is expressed algebraically
[MPa] Rated speed 2000 [rpm] Orif ice Land Ball Shoe Swash Plate Rec ess Piston Tilting Angle Rated temperature 50 [�] Fig. 1 Structure of Piston Assembly Pressure sensors with similar specifications were installed to the valve manifold and the highpressure pipe to measure the test pressure. 2.4 Test method In order to check life and acceleration properties, the rated condition of the piston assembly was set according to the actual specifications of the HST.
An identical shape parameter of the failure data means that the failure distribution is identical, affecting the acceleration relationship4) .

Therefore, the purpose of this research is to identify the factors that affect the quality of surface roughness, find out how much influence (% contribution) these parameter factors setting, and determine the optimum parameter combination on the plasma arch machining.
Robust Design The purpose of robust design is to determine the optimum combination treatment by measuring uncontrolled factors (noise) which affect the results of the response.
This research has three factors and three level which can affect the surface roughness of the plasma arc machining cutting results.
Parameters factor setting which affect the surface roughness are as follows: a.
G., Metrology and Properties of Engineering Surfaces (1st edition), Kluwer Academic Publishers, 2001