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China ahometownplant@163.com, c1004300131@qq.com, bhuili@163.com, dchunyuhua@163.com, elu_xianjun@163.com *corresponding author Keywords: Foam cement, Influencing factors, Properties Abstract.
The authors discussed the effects on the properties by key factors like water/cement ratio, foaming agents, foam stabilizers, accelerator and fibers of foam cement objects.
Moreover the physical and mechanical properties of it could fix the industry standards JC/T266-2011 foam cement.
Effect of accelerator on properties of foam cement. 
Effect of fiber on properties of foam cement.  

Introduction Casing failure of thermal recovery wells is affected by many factors, such as material characteristics of casing, strata characteristics, faults movement, and so on.
In thermal recovery wells, casing failure is affected by strata and geological condition [12].
Stress and strain of casing are analyzed, and influences of some factors on thermal-mechanical results are investigated.
Modeling for Thermal mechanical coupling Casing failure is affected by casing material, fluid behavior, strata condition, construction quality and so on.
Therefore, strains are affected by both force action and steam injection times.

It indicates a progressive decrease of the significance of the TRIP effect and at the same time the growing importance of the thermally activated processes affecting a thermal stability of retained austenite.
They are very important factors.
The stability of γ phase is related to several factors including deformation temperature [2,3,6].
This additional temperature affects the intensity of TRIP effect.
Therefore, steels showing the TRIP effect should be designed for providing the optimal mechanical properties at specific deformation temperatures.

Stalks’ Mechanical Characters.The pulling resistance and cutting resistance of the cones’ stalks are the important mechanical characters of stalks; meanwhile they are the key factors affecting the picking qualities.
The Pulling Resistance of the Stalks.The factors that influence the pulling resistance of the stalks are many.
The physical mechanics character of the cones is a very important factor affecting the picking operation.
[11] Yanmei Qing, Yuhua Cao, Changyou Li, Weizu Wang.Mechanical Properties of Fresh Longan Hulling[J].Transactions of the CSAE.Vol 26 No.5 May,2010:122-126.
In Chinese [16] Ranbing Yang,Yufeng Xu,Jie Liang,etc.Tests and analyses of mechanical properties of peanut root, stem and nut node in mechanical harvest[J]．Transactions of the CSAE.Vol 25 No.9 May,2009:127-131.

The comprehensive resistance factor(r) is affected by the loss coefficient along the tracks(λ), and the loss coefficient along the tracks(λ) is affected by the Reynolds number(Re), the Reynolds number(Re) is affected by the kinematic viscosity(), and the kinematic viscosity() is affected by the temperature(T).
The coupling of hydraulic characteristics and thermal properties of the fluid can be got by modifying the physical parameters, and this article provided evidences for the further study.
The Todini formulation is based on two sets of equations solving for all unknown heads and flows simultaneously in a sequential iterative manner.In order to achieve the coupling of hydraulic characteristics and thermal properties of the fluid, this paper studied the hydraulic calculation principle and the Todini iterative algorithm, and analyzed the relationship between physical parameters and hydraulic calculation for each step.
• The comprehensive resistance factor(r) is affected by the loss coefficient along the tracks(λ), and the loss coefficient along the tracks(λ) is affected by the Reynolds number(Re), the Reynolds number(Re) is affected by the kinematic viscosity(), and the kinematic viscosity() is affected by the temperature(T)
• The coupling of hydraulic characteristics and thermal properties of the fluid can be got by modifying the physical parameters, and this article provided evidences for the further study.

The objective of this study is to determine the factors affecting FSJ weldability of Al alloys as well as to determine optimum welding parameters for dissimilar welding of aluminum alloys.
Table.1 shows the composition and mechanical properties of alloy used.
Table.1 Chemical compositions and mechanical properties of Al6022-T4 and Al5052-H32 alloy Chemical compositions (wt)(%) Mg Si Cr Mn Cu Al AA 6022 0.6 1.0 - 0.08 - bal.
Mechanical properties Tensile strength (N/mm2) Elongation(%) Yield strength (N/mm2) AA 6022 260 30 145 AA 5052 230 8 195 Results and discussion Within the parameters used to control the dissimilar FSJ of Al5052 and Al6022, the most critical were tool rotational speed (rpm), dwell time (sec), and plunge depth (mm).
The weldment exhibit four distinct regions, namely: stirred zone (SZ), thermo mechanical affected zone (TMAZ), the heat affected zone (HAZ) and the initial base metal (BM).

Because the selection condition on access to inappropriate, would have affected the mechanical and physical property which reduced the optimum of weld sample.
Mechanical properties were tested by vicker hardness following ASTM E92-82(2003) standard test method for Vickers hardness of metallic materials [7].
The experimental design was used 23 factorial designs to be the main factors affecting significantly.
The results were used to study the factors that will affect the maximum hardness of 803.16 HV.
The results were used to study the factors that will affect the high penetration of 2.71mm.

The results showed that the properties of NBR are less affected than other elastomers.
In addition to the factors presented, there are technological aspects that involve the use of biodiesel.
One of these factors is the influence of these fuels on the materials properties, especially those materials used in the automotive industry.
The evaluation of tensile mechanical properties shows that 7 or 14 immersion days were sufficient to determine the changing trends in this property.
Fig. 3: Mechanical properties of aged composites in B5 blend renewed for each 7 days cycle and without replacement of the B5 blend.

FOS usually defined above 1 to compensate the actual characteristics and uncertainty condition of the material used including other external factors[5].
Properties of the material used is 1023 Carbon Steel Sheet (SS).
The result shows that the top cover thickness is the most affecting factor of the safety factor because the load is applied directly on the surface.
However, the base is not affecting the design much due to the design flange and shape including the well force distribution.
Ullman, The Mechanical Design Process, 2nd ed.

The intercalation behavior of OMVT, the mechanical and dielectric properties of the composite films were investigated.
The static mechanic properties of the films were tested by REGER3010 Electrical Universal Material Machine with the rate of 5mm/min and the dynamic mechanical analysis(DMA) was carried out by DMS6100 Dynamic Mechanical Spectrometer.
The further increase of OVMT leaded to decrease of the mechanical properties because of the obvious aggregation of OVMT.
(a) storage modulus E`,(b) the loss modulus E``,(c) mechanical loss factors (tanθ).
On the other hand the mechanical properties of the hybrid films could be increased by incorporating OVMT at the concentration lower than 15wt%.