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Three properties of the polymers were considered, viscosity was evaluated by melt flow rate (MFR), crystallization by differential scanning calorimetry (DSC) and mechanical property through impact strenght.
Oblak and co-workers [10] found that mechanical recycling caused evident deterioration of HDPE mechanical properties after 10th reprocessing cycles.
They also emphasized that even after 100 recycling cycles, HDPE was able to retain 80% of its initial mechanical properties.
Conclusions Some properties are more sensitive to reprocessing than others.
Impact resistance was not affected after five reprocessing cycles.

The factors that affect construction difficulty in the every stage of construction are identified.
Then the PMIS can incorporate those factors by employing difficulty factors to each unit of piping.
The material ID represents each individual component registered in the model with the unique properties.
In other words, the initial estimate does not reflect the reality of construction sequence because it does not consider the other factors such as location of pipe spool or distance between pipes that affect the constructability beside physical characteristics of material.
The factors that affect constructability for each type of materials must be identified and considered to improve the accuracy of performance measurement and prediction of remaining work scope.

An analytical model has been proposed by Zhang [4] in which several influencing factors should be considered: material properties, boundary conditions effects, the specimen thickness and material anisotropy.
The factor f=rmrm'=θ1θ2 expresses the numerical value of the springback (springback factor), as shown in Figure 3.
The calculated values ​​of springback depending on the sheet thickness, the bend radius and the material properties obtained by the use of the relationship (2) are compiled in Table 3 for each material.
The table 4 summarizes; on the one hand the results obtained by different numerical simulations considering two influencing factors e and rp, and on the other hand the results obtained by the use of the relationship (4).
Note that this displacement corresponding to the bending depth does not significantly affect the springback for small values (U value from 1 to 4 mm is tested).

The influences of factors on silicon rubber performance were investigated such as raw rubber dosage, thermal-resistant additive dosage and process conditions.
Effects of vinyl content on the properties of addition silicone rubber.
Properties and research progress of silicone rubber.
Research progress of aging properties of silicone rubber.
Regulai bimodal polydimetyhlsiloxane networks. e-lastomeric properties of the tetrafunctional networks.

Welding sticks H05MnNiMo and H06H1 are developed to improve the corrosion resisting property of the X80 pipeline in submerged arc welding.
And the characteristic and mechanical of the welding seam was discussed.
Since non-equilibrium complicated chemical and physical changes is conducted on the pipeline steel in the process of pipeline welding, deficiencies as the inhomogeneous chemical constituent, the existence of quenched structure, non-uniform mechanical properties, and the different electrochemical corrosion characteristic in the welded joint exist and tend to cause corrosion in the welding joint [6].Thus the corrosion of the joints is the key factors affecting the reliability of the pipeline system, mainly caused by the sulfur medium in crude oil.
It can be deduced from the anti-corrosive alloying principle that the more positive natural corrosion potential of the rare earth, copper and nickel decreases the cathodic polarizability, makes the base mental passivated and finally increases the anti-corrosion property of the alloy [9].
The more positive the potential is, the better the anti-corrosion property is.

This study aims to examine the effect of the pore on mortar properties with eggshell powder (ESP) as its fine aggregate alternative based on two fundamental properties: microstructural and mechanical strength.
Additionally, concrete with an eggshell composition has acceptable mechanical and radiation shielding properties [32].
Therefore, this study was conducted to examine the properties of the modified mortar with eggshell powder (ESP) as its fine aggregate alternative based on two fundamental properties: microstructural and mechanical strength.
Mechanical properties of hardened mortars.
A variety of factors can influence pore formation.

The surface of the patch will form the high stress area, that affects UAV using life and safety .But repair method is good or bad directly affects size of the high stress area.
Because of weather or other accidental factors, wings of UAV often have local damages that have holes, cracks and so on.
These damages will not affect body structure of UAV, but a local high stress area will be produced during the flight training.
It analyzed mechanical effect on hole of wings to aviation safety, and provided reference to make the plan of holes filling.
Material property is: E1=181GPa, E2=10.3GPa, E3=10.3GPa, PRXY=0.1677, PRYZ=0.1677, PRXZ=0.035, GXY=7.24GPa, GYZ=4.94GPa, GXZ=7.24GPa。

The Role of Low Temperature on Mechanical and Fatigue Properties of Different Alloys F.
At each temperature, mechanical properties, σy, σu, E, εr, impact energy absorption curves, and some fatigue properties such as the initiation life, Ni, total life, Nf, and propagation life, Np, as well as the shape of the propagation curve, da/dN-Kmax (Kmax maximum stress intensity factor) were assessed.
This is true for almost all mechanical and fatigue properties in different materials.
Mechanical properties are listed in table 1 and Fig. 1.
The same tendency occurs for general mechanical properties.

This is because the processing of the shafts on CNC lathes introduces a number of technological errors [1-7] that affect the accuracy of mechanical processing.
The development of the manufacturing process for stepped shafts depends significantly on the following factors: the design of the shaft, the geometry of surfaces and the accuracy of their parameters, the interrelation of parameters, and the volume (quantity) of product output.
In addition to the listed factors, the method of obtaining workpiece parts is also of great importance [1-8].
v= CVTm tx Sy KV (1) Where T=60 min, the tool life is assumed, and the general coefficients take into account the factors such as the material requirement, tool strength, etc. [13].
Kp is a general coefficient that includes the machinability of the material, tool properties, and cutting force conditions.

It is greatly influenced by the geometric nonlinearity effects due to its mechanical properties of flexibility[4-6].
Geometric nonlinearity effects are usually caused by three factors as follow: (1) Large displacement The geometric deformation of large span cable-stayed bridge is large under the load, and increases as the increase of load.
Line endpoint relative displacement is affected by three factors of cable itself: (a) Elastic strain produced after load is applied on the cable is controlled by the cable material elastic modulus.
Additional bending moment caused by axial force makes greater bending deformation and affects the axial stiffness of the beam.
(3) Under constant loads,cable sag is a major factor in nonlinear effects.