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When the rocket is launched, the impact of the mechanical properties and elastic deformation of the composite material directional tube on the rocket movement cannot be ignored.
Considering the flexible deformation of the FRP directional tube, the finite element method is used to perform an explicit dynamic analysis of the rocket launch process, to simulate the interaction between the rocket and the directional tube, and to understand the dynamic mechanical properties of the FRP directional tube.
Composite materials have anisotropic elastic properties, and the difference between anisotropic elasticity and isotropic elasticity is only in the stress-strain relationship.If it is a cylindrical orthotropic body and one of the symmetry axes of the material is parallel to the longitudinal axis of the tube, the strain-stress relationship of the composite material is: In addition to the aforementioned flexibility coefficients that represent the elastic properties of materials, engineering elastic constants are often used to represent the elastic properties of materials in engineering.
The initial disturbance is an important factor affecting the dispersion of rockets.
Conclusion Through simulation modeling and numerical calculation, the law of motion of the rocket launched in the directional tube and the dynamic mechanical properties of the FRP directional tube are mastered, and the following conclusions are drawn: a.

The Factors to Influence the Shearing Quality The factors which influenced the shearing section are very so many.
With the temperature changes, the stress properties of material also change.
The mechanical property of material in shearing section would be changed when the temperature increased to the extent [5].
When the shear blade gap reduced to certain degree, shear section quality goes bad. this is because the fracture cracks can be met in a straight line when blade clearance is appropriate, Conclusion The factor affects the quality of shearing section is so many, only considering one or two factors is impossible to change the quality of section.
In the shearing process, we must fully consider the comprehensive effect of shearing speed, shear temperature, shear blade clearance and the properties of materials.

Electrochemical properties of the electrode fabricated with synthesized nanoparticles were evaluated. 1.
Generally, nanoparticle, such as metal oxide and metal carbide, has been fabricated by the chemical techniques and investigated on their physical and chemical properties.
The properties are also affected by the construction of the reactor, the heating method, the temperature gradient, preheating of the reactive gases, and the method of introducing the gas into the reactor [2-5].
For examination of its electrochemical properties, particles, which were synthesized at 125 torr of Fig. 4.
In the electrochemical properties, the maximum discharge capacity was about 115 mAh/g, and showing very low capacity compared with conventional capacity (about 400 mAh/g)[6].

This material is considered as an effective alternative of conventional construction material because of its attractive mechanical and physical properties.
The solution is used subsequently to find the buckling coefficients of plate having different mechanical properties.
ANALYTICAL RESULTS AND DISCUSSION In this study, buckling analyses were conducted for the different mechanical properties of plate by using the program developed.
CFRP (T300/N5208) Table 2 shows the mechanical properties [5] used in analyses and the graphical forms of results are shown in Fig. 3 through Fig. 6.
Using the buckling equations derived, plate buckling coefficients for the plate having different orthotropic mechanical properties are evaluated subsequently.

PREPARATION METHOD AND DEVICE OF MICROCELLULAR SHEET BASED ON BATCH FOAMING Xin XIAO, Xuetao HE, Yumei DING, Liu QIN, Weimin YANG College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Furthermore, CO2 will affect some physical properties of polymers, such as reducing the glass transition temperature (Tg) of the polymer, melting point (Tm) and the melt viscosity.
Fig.2: The sketch figure of supercritical CO2 diffusion kettle 1-CO2 gas bomb; 2-condense; 3-diffusion kettle; 4-preheater Fig.3: The real figure of supercritical CO2 diffusion kettle 2.1.2 The processing parameter of diffusion kettle with saturate pressure Based on the microcellular foamed materials prepared by supercritical CO2, the saturation pressure, saturation temperature and saturation time are the crucial factors at the saturation stage in kettle.
The unloading time of taking off the PVC from diffusion kettle will affect the nucleation density of gas in the foaming stage.
Fig.9: Microcellular sheet prepared by this method Conclusion Microcellular foamed plastic can reduce the amount of polymer without sacrificing mechanical properties of materials at the same time.

Frictional properties and tribology of the skin are presented in ([10], [11]).
We assumed that bone and soft tissue are fully connected and they are modeled by a multibody that has parts with different mechanical properties.
The material properties are taken from literature [4] and are summarized in Table 1.
Portnoy, et. all., Surgical and Morphological Factors that Affect Internal Mechanical Loads in Soft Tissues of the Transtibial Residuum, Annals of Biomedical Engineering. 37(12) (2009) 2583–2605
Zhou, Effect of prosthetic socks on the frictional properties of residual limb skin, Wear. 271 (2011) 2804– 2811

Furthermore, the most critical area of the joint was identified to be the weld interface, i.e. the area between the nugget and the thermo-mechanically affected zone. 1.
The most important reason for this difference seems to be the evolution of residual stresses around the welded area, while the microstructure and material property changes and the developed distortions due to the welding operation have been proved to be less dominant.
The applied minimum and maximum load values have been appropriately selected in order to lead to an initial stress intensity factor range value of about 7MPa√m.
c) The weld interface, namely the interface between the weld nugget and the thermo-mechanical affected zone, seems to be the most susceptible area of the weld for crack initiation and fast crack propagation.
REFERENCES [1] Cavaliere, P. , Santis, A. , Panella, F. and Squillace, A. (2009) Effect of anisotropy on fatigue properties of 2198 Al-Li plates joined by friction stir welding.

Being a non-mechanical metal removal process, ECM is capable of machining any electrically conductive materials with high stock removal rates regardless of their mechanical properties, such as hardness, elasticity and brittleness[1-3].
Effects of Electrolyte Flow Filed The numerical solution discussed above only considers the factor of electric filed within ECM gap domain.
The machining experiments of ECM have proved that electrolyte flow can result in the change of electrolyte conductivityκ.The most important influencing factors affecting on κare electrolyte bubble rate and temperature rise.
The change of κcan affect the boundary condition (5), which is applied to calculate 1b .
So we call this numerical solution involves the two factors of electric field and electrolyte flow filed in ECM process synchronously.

System nonlinearities, uncertainties, structure flexibility and other factors can’t be ignored in controller design.
It can not only solve the freedom problem, but also avoid affecting the calculation of the interaction force.
The material properties of inverted arm were defined in ANSYS, the 8 nodes solid element Solid45 was selected using intelligent grid division.
All these factors have had serious impact on system stability and dynamic characteristics, especially the control precision is difficult to predict by influence of load characteristics[4]。
The strategy effectively overcomes the effect of nonlinearity, parameter uncertainty, un-modeled dynamics and other factors.

Experimental Investigation on Uniaxial Tensile Properties of Steel Fiber Reinforced Concrete Yining Ding 1, a, Yingchao Yan 1,b 1 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China aynding@hotmail.com, byanyingchaosxdt@163.com Keywords: Uniaxial Tensile Behaviour, Concrete, Steel Fiber, Ductility.
The test results showed that steel fiber can improve the tensile property effectively.
To date, some direct tensile tests of plain concrete and steel fiber reinforced concrete (SFRC) have been reported[1-6], and based on these studies, mechanical characterization was performed in this paper by means of uniaxial tension tests with the aim of observing the first crack strength, the ductility indexes and the load-displacement curves.
Table 3 Average mechanical factors of concrete in direct tension Group of concrete Strain at peak load Tensile strength ft [Mpa] Equivalent tensile strength feq,1[ Mpa] Equivalent tensile strength feq,2[ Mpa] Equivalent tensile strength feq,3[ Mpa] SF20 140.54 3.30 1.13 0.92 0.72 SF40 154.12 3.32 1.47 1.27 1.07 SF60 185.03 3.39 1.91 1.64 1.43 SF80 206.30 3.41 2.46 2.14 1.72 Conclusion The present experimental analysis was carried out in order to investigate SFRC mechanical behaviour with respect to different fiber content.
The experimental results of this study have led to the following conclusions: Uniaxial compressive tests showed how the compressive strength of the material is less affected by the presence of fibers.