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But its physical and mechanical properties are short comparing to metal pipeline, which limits its promotion in the oilfield.
It has good properties of electrical insulating and chemical stability.
At the same time pipe insulation needs to be made on the spot, affecting its thermal performance.
According to field repair analysis, there are five factors to the pipeline leakage reasons, as shown in Table1.
Anti attenuation rate of pipe mechanical property = (initial amount of pipe mechanical property-Termination amount of pipe mechanical property) / initial amount of pipe mechanical property.

Hydraulic components are key components of hydraulic press, its design quality directly affect the performance of the host and service life.
At last, through the software to the linear static analysis, the model to obtain the mechanical properties of the hydraulic components, it has reference significance to improve the design.
Such as analysis of high-rise buildings and large span bridges in earthquake affected, see if destructive accidents will happen; Calculating the temperature field of a nuclear reactor, heat transfer and the cooling system is reasonable.
Hydraulic components is to do the hydraulic energy into mechanical energy, the straight line reciprocating movement or swinging movement of hydraulic actuators.
Input a proper value below the minimum safety factor in the right box of figure, the value of, choose "show sample" button, can get column cap less than the safety in the numerical area coefficient, as shown in Fig.3 below.

Silicon Carbide Ceramic Turning Process Design and Parameter Analysis Zhenbo Wang1,a,Liang Zhang1,bandShuzhi Li1,c Mechanical Power and Engineering College Harbin University of Science and Technology Harbin,China awzb3328@163.com,bzlhkcx09@126.com,czjlsz123@126.com Keywords: Silicon carbide ceramic,Turning,Process design,Parameter analysis Abstract.This article mainly aims at the problem of silicon carbide ceramic mechanical turning difficult processing,by adopting the method of the numerical control turning processing.Design a special fixtures and a NC machining process to accomplish the manufacture of silicon carbide plate.And through the single factor analysis method to process parameters were analyzed.
Workpiece material properties and processing problems Functional ceramics,senior refractories,abrasives,metallurgical raw materials is the main application field of silicon carbide materials[2].Compared with the metal material,silicon carbide ceramic materials have very strong hard brittle, processing difficulties,using the method of common metal cutting is infeasible and the ceramics is not conductive,cannot adopt electric processing methods, such as electrical discharge machining,this greatly limits the use of silicon carbide materials, popularization and application of ceramic materials has been a corresponding block [3].
Fig.1 The location model of ceramic disc frock b.Tool design Silicon carbide ceramic is one of the most hard ceramic material hardness in all engineering ceramics,the difficulty of its processing is more than other materials,so reasonable design of tool is directly affects the precision grinding machining quality and efficiency.Figure 2 and figure 3 is used in the numerical control turning of the electroplated diamond grinding head and the real figure.
Experiment and analysis of parameters This test on grinding head size and spindle speed, feed speed three process parameters as a single factor level,surface machining of the ceramic plate,and measuring record its side damage.Diamond grinding wheel granularity were selected as the number 80,number: 150,number 300;Spindle speed were selected:26000r/min, 28000r/min,30000r/min;Feed speed respectively choice:0.1 mm/r, 0.15 mm/r,0.25 mm/r.
a.Effect of grinding head size on the side damage（unit:um）as shown in figure 4 (spindle speed of 28000 r/min,the feed rate is 0.1 mm/r): Fig. 4 The relationship of grinding head size and side damage quantity b.Effect of spindle speed on the side damage（unit:um）as shown in figure 5 (grinding head size is 150 mesh,the feed rate is 0.1 mm/r): Fig. 5 The relationship of spindle speed and side damage quantity c.Effect of feed rate on the side damage（unit:um）as shown in figure 6 (grinding head size is 150 mesh,spindle speed of 28000 r/min): Fig. 6 The relationship of feed speed and side damage quantity From the experiments we know grinding head size and side damage quantity is the related relationship, feed rate and side damage quantity is positively related to relationship, spindle speed and the amount of side damage is also present positive correlation, but relative to the other two factors, spindle speed affects the quantity of edge collapse is smaller.

In the actual machining process, there are many factors that affect the milling and the interacting mechanisms are very complex, thus the leading factor needs to be found.
DEFORM-3D has a rich repository of materials, and it can be customized according to the material properties, among which hardened tool steel Cr12MoV is matching to the AISID2 (Cold) of United States, and the tool material is Carbide WC.
Reasonable separation criterion can closely reflect the real situation about the mechanical and physical properties of the workpiece material, and can directly affect the simulation results of cutting force, chip shape and cutting hot.
Cutting parameters such as spindle speed, feed per tooth and cutting depth, are the main factors that affect cutting force and cutting temperature in the high-speed milling.
As the hardness increases, the chemical bonds between atoms in the material are connected more closely, which forms metal material physical properties of being relatively stable.

In order to estimate the thermal-shock influence on the mechanical properties, tensile tests of the conditioned samples were carried out at 1 mm/min loading rate.
To accomplish better mechanical properties of the GFRP composites, proper scattering of nano-particles in polymer region was becomes vital.
Ray, Water absorption behavior, mechanical and thermal properties of nano TiO2 enhanced glass fiber reinforced polymer composites, Compos.
Ray, Evaluation of mechanical properties of Al2O3 and TiO2 nano filled enhanced glass fiber reinforced polymer composites, J.
Eisenberg, Dynamic Mechanical Study of the Factors Affecting the Two Glass Transition Behavior of Filled Polymers.

The measured bending properties are used to simulate a thermoforming process.
Therefore, the mechanical properties must be known at a range of manufacturing temperatures.
The tensile and in-plane shear behaviors are the two most important mechanical properties in the thermoforming.
The tensile properties can be measured from biaxial tests.
The in-plane properties are those given in [4].The bending properties are the values obtained with bending test method mentioned in this paper.

,LTD, Beijing 100088 a10115295@bjtu.edu.cn, b10115286@bjtu.edu.cn, cmzhbai@bjtu.edu.cn, dzhyxu@bjtu.edu.cn, e yjj.good@163.com Keywords: stability; numerical simulation; strength reduction; seepage Abstract: Landslide instability has plenty of influential factors.
Introduction Landslide instability has plenty of influential factors.
When analyzing landslide seepage, we have to take into consideration various influential factors, such as rain capacity, duration, intensity, soil layer permeability, strength of soil with different water content, intact border condition, initial condition, etc.
However, affected by long period stress, the ground layer along the front edge of the slope has emerged obvious shearing fault belt.
Thus, during heavy rainfalls, slope displacement should be timely monitored mass, protecting people’s lives and properties via mass prediction and disaster prevention.

The amount of soft-tissue cushioning beneath the remaining bone is one of the most important biomechanical factors affecting stress distribution.
(B) Different parts of the CAD model. 2.2.FE model creation 2.2.1 Mechanical properties The mechanical properties assigned to the various components of the finite element (FE) model were selected to accurately replicate their biomechanical behavior.
While environmental factors such as moisture or sweat may reduce friction in practice, the chosen value remains within an acceptable range for quasi-static finite element modeling [20].
Sanders, et al., Material properties of soft tissues in the residual limb: Clinical implications for prosthetic socket design, J.
Mak, In vivo friction properties of human skin, Prosthet.

Bending fatigue properties of gears The factors that influence bending fatigue properties of gear drive are divided into three categories.
(i) Factors that influence local stress.
(ii) Factors that influence the microstructure of gear material.
(iii) Factors that influence the source of tooth root fatigue damage. such as surface roughness of gear.
Fig.2 S-N curves of bending fatigue Load spectrum of tooth root bending stress The properties of stress cycle are decided by average stress sm and stress amplitudesa[5].

In the optimization algorithm, several important influencing factors are considered, such as the molding direction, the extrusion speed, and layer thickness, etc.
Ismail Durgun and Rukiye Ertan[4] discovered that the pate orientation has a significant impact on the surface roughness and the mechanical properties of the product.
In addition, the RP processes deposit material directionally resulting in direction dependent, or anisotropic, material properties[5,6].
Wright, Anisotropic material properties of fused deposition modeling ABS, Rapid Prototyping J. 8 (4) (2002) 248–257
[4] Ismail Durgun and Rukiye Ertan,Experimental investigation of FDM process for improvement of mechanical properties and production cost, Rapid Prototyping Journal J.