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The engine blade vibration is one of the important factors, which seriously affects the stability of the whole machine, so the vibration characteristics and the reliability of the blade are very important.
However, the randomness of the influence factors on the blade vibration frequency is ignored.
As the material property is the crucial factor of blade frequency distribution, the elast- ic modulus and the density become more important than other factors.
The Elastic modulus, the densityand the rotor speed are the main influence factors on the blade second-order vibration frequency distribution, with the sensitivity probabil- ities 35.09%, 34.56% and 24.15% respectively
Probability Design Method of Margins of Safty for Reliability Characteristic Par- ameters of Space Mechanical Products [J].

Springback is the key factor affects the die designing in the field of sheet metal forming.
Many factors have affect on springback of V bending.
In this study, the factors, bending angle α, the ratio of the radius of tool to sheet thickness R/t, bending type, are considered.
The material properties are shown in Table 2.
By using finite element analysis, the amount of springback angle in terms of springback factors, bending angle, R/t Ratio and bending type can easily be obtained.

For the sake of just a punctual comparative term, the physical and mechanical properties of a conventional type refractory concrete (CRC) with a higher CAC percentage (15%) formulated with q = 0.26 was also evaluated.
Apart from the chemical and mineralogical composition, the particle size distribution is a key factor to influence the castables rheology and final mechanical properties.
q = Distribution Modulus The implementation of the Andrease´s model to refractory castables has lead in practice to improved packing and better mechanical and elastic properties, either after drying or firing at high temperatures.
Considering that the Andreasen´s distribution modulus q, is directly linked to aggregate proportions, stablishing the microstructure packing status, it is reasonable to expect that it will affect the mechanical properties of the castables, including the elastic modulus.
Boch, “Elastic Properties of High Alumina Cement Castables from Room Temperature to 1600˚C,” J.

These alloys are thermo-mechanically processed, and their formability and mechanical properties is dependent on a number of factors.
Alloys with small amounts of Mn have been found to give variations in properties such as extrudability and mechanical properties[7].
This would affect the precipitation behaviour of the ageing elements, which could influence the final ageing.
It is uncertain how the presence of Cu may affect the precipitation behaviour.
[3] O Reiso, U Tundal and J Andersen, The effect on cooling rate after homogenization and billet preheating practice on extrudability and section properties. part2: Microstructural investigation, Metall and Mat Trans A, 1 (1995) 141-147

These characteristics make nanofibrous layers have different properties in comparison with currently porous fibrous materials[1].
The rheological properties of solutions and the morphology of nanofibers membranes was examined with rheometer (Ar2000, AT, America) and microscopy (S4800, Hitachi, Japan), respectively.
Mechanical properties were measured with a Instron mechanical tester (3365, Instron, America), under a speed of 10 mm/min.
Results and Discussion In the process of spinning, shear rate is one of the important factors that affect spinning liquidity.
The possibility of a movement of nanofibers in structure and inner friction in polymer layer has an impact on the final absorption properties of the material.

Analysis of Theory and Model of Background Magnetic Field of High-spinning Projectile Keyu QI 1, a, Chao Xiang 2,3, b, Xiongzhu Bu2, c, Jing Yu2,d 1Science and Technology on Electromechanical Dynamic Control Laboratory, Xi’an, China 2 School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China 3 Shanghai Electro-Mechanical Engineering Institute, Shanghai, China akeyu-qi@163.com, bxiangchao050726@foxmail.com, cbuxu105@mail.njust.edu.cn, dnjustyujing@126.com Keywords: Background magnetic field; Attitude measurement; Mathematical model; Error analysis Abstract.
The coefficient related to projectile material properties and structure size.
According to the material properties of one projectile and the early work [5], the projectile background magnetic field parameters are set as follows ,, The values of geomagnetic components without BMF are shown in Fig.4.
Comparing errors of different compensation, it is found that: errors affected by PMF are greater than errors affected by IMF and EMF. 
Conclusion The compensation model proposed in the paper is used to compensate the geomagnetic component measuring errors affected by background magnetic field.

Influence of Environment on Creep Properties of MC2 Single Crystal Superalloy at 1150°C Sébastien Dryepondt1 , Eric Andrieu 1 , Daniel Monceau 1 , Fabrice Crabos2 and Cyril Vernault2 1 CIRIMAT UMR 5085, ENSIACET-INPT, 31077 Toulouse Cedex 4, France 2 TURBOMECA 64511 Bordes, France Keywords: single crystal superalloy, creep test, controlled atmosphere, high temperature oxidation.
Many factors can damage these parts.
They were surface polished with SiC paper and diamond paste down to 3 µm to remove affected zone by rectification.
Another way to explain the deterioration of the mechanical properties by oxidation is the injection of point defects.
Conclusion The tests performed under controlled atmosphere have shown the drastic oxidation effect on creep properties of MC2 at 1150°C.

The results shows that the position and shape of solid-liquid interface is mainly affected by mold temperature, casting speed and cooling distance.
Any factors that affect on the heat transfer process and temperature field distribution of will let the location and shape of solid-liquid interface change.
Fig.1 The casting model and boundary conditions Table 1 Parameters of each schemes Parameter Factor 1 2 3 Mold temperature T/ K 1356 1373 1383 Casting speed / mm·min-1 80 100 120 Cooling distance L / mm 20 40 60 Mathematical Model Assumptions and Boundary Conditions.The factors of height of liquid, melt temperatures and vibration are not considered, for it is easy to control relatively.
The room temperature tensile mechanical properties test, the tensile strength of copper rod is 145.3MPa, the elongation ratio is 50.6% and the section shrinkage ratio is 56.6%.
Conclusions •The simulation and experimental results show that the position of solid-liquid interface is mainly affected by mold temperature, casting speed, cooling distance in the process of HMCC, and were moved to mold export with the improvement of mold temperature and casting speed or the reduce of cooling capacity.

This paper presents the main results of the research carried out to analyse the mechanical properties of concrete incorporating with eggshells waste.
The chemical properties of eggshells ash is shown in Table 1.
Table 1 Chemical properties of eggshells ash.
In order to ensure the water cement ratio is not affected, the sand must be dried out first.
One of the most important factors for producing workable concrete is a good gradation of aggregates.

The historical plastic deformation and temperature rise will deeply affect the material properties which will be adopted in the next simulate stage, i.e. burr formation.
A coupled thermal-mechanical model of plane-strain orthogonal metal cutting is developed.
Deformation of the workpiece material is treated as rigid-plastic with isotropic strain hardening, and the numerical solution accounts for coupling between plastic deformation and the temperature field, including treatment of temperature-dependent material properties.
In this study, the shear friction factor µ of 0.65 is used.
Similar to other factors (such as friction or flow stress), this value can influence the predictions and must be estimated with reasonable accuracy [10].