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Application of Knowledge Based Engineering in Aeronautics Mold Parts Parametric Design ZHAO Yan-ling1,a, CHE Chun-yu2,b, WANG Hong-bo3,c, YUN Zi-yan4,d, XU Guan-hong5,e 1,2,3,4 School of Mechanical and Power Engineering, Harbin University of Science and Technology, NO.52 Xue fu Street, Nan gang District,Harbin,150080,China 5Technical Supervision Center of Daqing Petroleum Administration Bureau, NO.552 Xi bin Street, Rang hu lu District,Daqing,163453,China azhaoyanling@sina.com,bchechunyu_1988@126.com,c573572750@qq.com, dyunziyan89@126.com, e724460325@qq.com Keywords: Aeronautic mold part, knowledge-based engineering, knowledge fusion, parametric design.
Introduction Composite material has the specific material properties of high strength, high stiffness, fatigue resistance and corrosion resistance, which make it be one of the uppermost material in aircraft parts manufacturing[1,2].
Therefore, the design and production efficiency of composite forming die becomes the decisive factor affecting the whole efficiency of aeronautic parts[3].
Meanwhile, by the application of knowledge engineering, the well designed parts can carry with certain knowledge of engineering properties.

Hu 1,c 1 School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai, PRC a jypei@sjtu.edu.cn, bchnguo@sjtu.edu.cn, cdjhu@sjtu.edu.cn Keywords: Polycrystalline diamond, Electrical discharge machining, Grinding Abstract.
The excellent properties of high strength and high toughness cause problems in shaping PCD blanks.
Advances in Materials Manufacturing Science and Technology 458 Because of the properties of the PCD, large open circuit voltage and large peak current are needed in EDM.
Wheel speed is a primary factor that affects the material removal, wheel wear and the surface roughness.
The SR is affected mainly by the grain size of PCD.

Test results show that this new vacuum preloading condition can transmit vacuum head into vertical drains efficiently and the effect of drain filter to slurry improvement is affected by the drain spacing.
The ground improvement effect of vacuum preloading method is determined with three factors: 1) drainage path design; 2) drainage type; 3) pattern and spacing of vertical drainages.
But there are many factors that can not be taken into account in analytical and numerical study, such as drain clogging and drain bending.
The physical and mechanical parameters of the sampled soil are shown in Table 3.
Comparison of soil parameters before and after improvement in model casing test Table 7 shows that physical and mechanical parameters of soil in model casing box 3 have been obviously improved.

However, principles of coating used for hard-alloy and high-speed tools, being applied to the ceramic tool, fail to achieve a substantial effect due to the specific physical and mechanical properties of the ceramic tool - first of all, extremely low electrical conductivity [14].
Naturally, the properties of nitride will vary significantly depending on the particular metal used [16].
Creating composite coatings containing two or more elements, allows combining a variety of coating properties.
The chemical composition of the processed material, along with the above factors has a huge influence on the choice of the coating composition.
Effect of Complex Mechanical Loading,Refr.

It was concluded from this study that different aggregate blending can significantly alter the SMA mixture properties.
Both macrotexture and microtexture affect the friction characteristics of pavement surfaces [1, 2].
The basalt blending with limestone improve the aggregate physical properties, which results in improving the mixture properties.
Therefore, different rock of aggregate blending can significantly alter the mechanical properties of the mixture.
McGhee, “Effect of HMA Properties on Pavement Surface Characteristics” 2002 FWD User Group Presentations, pms.nevadadot.com. (2002) [2] A.

Simple mechanical transfer of the accumulated experience in the projecting, construction and operation of gas consumption objects is absolutely unacceptable under modern conditions.
One of the factors hindering the widespread introduction of devices based on the pulsating combustion is insufficient knowledge about intra-chamber process.
It is a complex function which depends on the phase velocity ω of pressure waves distribution and the damping factor k
The medium pressure in at least one measuring point on the impulse tube is perceived by electric-mechanical transducer disposed in heat and soundproof acoustic capacitance, wherein the mechanical oscillation is converted to an electrical signal by an electronic circuit consisting of a voltage source and resistance.
The process of pressure changing in the boiler channel can be represented as a chart describing the processes occurring in this – Fig. 2 where A-B – increasing of pressure during air-fuel mixture combustion, B-A’– flue gases cooling, C-F - process of natural gas admission through the gas-pulsed valve; D-E – process of air admission through the air-pulsed valve; A-A’ – time of cycle 1 (determined by the acoustic properties of the resonator).

The quality of the external pulsed magnetic field (PMF) influence on the diffusion process can be determined by the magnetic properties of the diffusing impurity atoms in solid solutions, and, as the experiments in magnetostatic fields show [1], by the magnetic properties and structural condition of the diffusion matrix proper.
To a great extent these factors determine the nature of activating the MF-influence on the diffusion process.
The development of a complete model of the heterodiffusion of Al in a ferromagnetic Fe at high temperatures under the PMF is a real challenge, since it touches upon numerous unexplored factors and phenomena of ferromagnetism.
In case of a solid solution of Al impurity atoms in Fe, a dominant role (∼12 %) belongs to the atom dimension factor, rather than to the charge factor [14].
Under the occurrence of sufficiently large mechanical strains the dislocations can be torn off or unpinned from the impurity atoms that are stuck to them [15].

The principal factor is the normal stress parallel to the axis of the bar, or fibres respectively (labelled L), and the shear stress acting in the cross sectional plane (labelled T and R) [1].
It is not clear whether a greater obliquity of its cheeks is desirable, how the bolt is loaded or how the peg’s misalignment affects its loading.
Under respective loading, the structures are in the same state of stress (at the end of linear behaviour). 2) Friction dramatically affects the forces in the peg – if the peg is soft, friction forces are activated and stresses in the peg are reduced. 3) The scarf obliquity significantly affects the stresses in the peg as well as the scarf cheeks. 4) The investigated forces decrease with the decreasing angle of the scarf. 5) The stress in the weakened cross section for the given loading ranges within a very narrow band.
Fernández-Cabo : Fracture Characteristics and Properties of Thermally Modified Timber made out of Beech.
Sordié.: Mechanical behaviour of double-step timber joints, Construction and Building Materials, 24, 2010, no. 8, pp. 1364-1371

Fig 1 gives the details of the dimensional properties of the blade designed in the reference model.
Airfoil Properties The airfoils used are the NREL S- Series airfoils, S818, S825 and S826.
Below is the material properties used.
As such, for the purpose of simulation, the material properties were obtained from [11].
Mass Properties Mass properties of (Blade + Spar) SolidWorks Mass 13492.66 Kg Volume 5.85 m^3 Surface area 443.69 m^2 Centre of mass X 1.00 m Y 0.30 m Z 15.51 m The mesh was considered as a combined curvature mesh.

However, studies are known, in which influence of rarefaction degree on creep, flow and other physical and mechanical properties of metal bodies are established, which allows to presume that relaxation resistance is related with degree of rarefaction of environment.
The most important factors determining accuracy of testing are as follows: technology and quality of specimens' manufacturing, accuracy of measurement of gap and consideration of temperature influence on linear dimensions and methodology of application of markings.
Let's examine effects of each of these factors.
At that, a circular specimen is repeatedly loaded and then unloaded, which affects process of relaxation and convergence of obtained values.
From the presented analysis it is clear that total error for assessment of stress relaxation by means of the method of circular specimen with equal flexural strength, due to discussed factors reaches 20%, but, considering a specimen's manufacturing technology, it can be even bigger.