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Measuring Threshold Pressure of Melt Magnesium Infiltrating Into Al2O3sf Porous Preform with Fast Method Zhou Jiming1, 2, a, Gu Xuehua1,b, Yang Fang1,c, and Qi Lehua1, 2, d 1 School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, P.R.China, 710072 2 The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Xi’an, P.R.China, 710072 azhoujm@nwpu.edu.cn, b guxuehua1027@163.com, cgwj@nwpu.edu.cn, dqilehua@nwpu.edu.cn Keywords: metal matrix composites (MMC); liquid metal infiltration; threshold pressure; capillary phenomena.
If the pressure is so large that the reinforced materials could not withstand, the preform may be crushed to weaken the property of the composite.
Experiment materials and procedures The AZ91D magnesium alloy was used in the experiments, and the main compositions and properties were given in Table 1.
Table 1 Compositions and property parameters of AZ91D magnesium alloy Al Zn Mn Si Mg Density[g/cm3] Solidus[℃] Liquidus[℃] 8.5～9.5 0.45～0.9 0.17～0.3 ≤0.05 Bal. 1.81 470 595 Table 2 Compositions and parameters of Al2O3 fibre component metallographic Length[µm] Diameter[µm] Density[g/cm3] tensile strength[MPa] SiO2<20% Al2O3>80% α- Al2O3sf >50 3-10 3-5 1130 Fig. 1(a) shows the schematic diagram of the developed infiltration measurement device.
Louis, Factors affecting pressure infiltration of packed SiC particulates by liquid aluminum, Metall.

Research on the simulation method for I.C.E structural acoustic radiation Zhang Bao-Cheng, Zhang Guang-Jiong and Zheng Bao-Qian College of Mechanical Engineering & Automatization, North University of China, Taiyuan, China ncitzbc@nuc.edu.cn Keywords: internal-combustion engine; structure vibration; structural acoustic radiation Abstract.
Taking into account the main structure of I.C.E, the internal fluid, external accessories and mount installation conditions and many other factors, a simulation study and relevant test validation of the structure of radiation noise problems with the diesel engine were carried out 1.
DY�AMICS CHARACTERISTICS A�D DY�AMIC RESPO�SE A�ALYSIS OF WHOLE STRUCTURE The dynamics characteristics and dynamic response analysis of the I.C.E structure is significant affected by the internal fluid, the exterior appendix, the suspension installing conditions as well as other factors.
Besides, the above three factors must been taken into account when analyzing and predicting the structural-acoustic radiation of I.C.E.
By definition in formula (2), the ATV is completely determined by the configuration of the acoustic system under consideration and therefore only depends on the system parameters: the geometric of the vibrating surfaces, the field point location and analysis frequency of acoustics response as well as the physical properties of acoustic transmission medium (speed of sound & fluid density), but has nothing to do with the operational structural response.

Introduction Photonic crystals have attracted much attention due to their unique optical properties and their potential use in optical devices.
The optical properties of photonic crystals such as band gaps depend on the properties of the constituent phases and their spatial distribution.
The existence of photonic band gap gives rise to a number of interesting and useful properties including the localization of light at defects and surfaces and the inhibition of radiation [1, 2].
The filter radius, is defined to identify the neighbouring elements that affect the sensitivity number of element.
Hougaard, "Geometric properties of optimal photonic crystals," Phy.

However, gel electrolytes had poor mechanical stability compared to thin films form.
Polymer blending is one of the useful techniques for designing new materials with various properties this technique had been employed by several research groups [1, 2].
Among the advantages of employing this method are simplicity of preparation and easy to control physical properties by compositional change [3, 4].
The new polymer blends often exhibit properties that are superior compared to the properties of each individual component polymer [5-9].
Detailed studies of the blend-based polymer electrolytes provide precious information on the relative importance of various factors that affect the electrical, thermal and mechanical properties of the material.

The authors have analyzed the parameters which affected the rib’s stability, such as span ratio, arch rib stiffness, boom stiffness and so on.
The first-order stability factors differ about 30% under the three kinds of conditions, showing that permanent loads still play a main role in the bridge stability under the operation phase.
Figure 8 is the influence of different span ratios on safety factor.
As shown in figure 8, in the process of the span ratio gradually increases from 1/12 to the l/4, stable structure factors first increased and then decreased, which is not a monotone increasing or decreasing process.
The problem how to simulate the mechanical properties of concrete filled steel tube is worthy of further research.

This tilt could be responsible of the low friction factor.
In this specific applicative field, studies are essentially focused on the improvement of the hardfacing machining and relationships between deposition process parameters and mechanical properties of the hardfacing coatings [12,13].
For all this tests, friction factor evolution versus time is rather smooth.
The affected friction depths are approximately similar for each wear test and about 350µm.
References [1] Atamert, S.; Bhadeshia, H.K.D.H.: Comparison of the Microstructures and Abrasive Wear Properties of Stellite Hardfacing Alloys Deposited by Arc Welding and Laser Cladding, Metallurgical Transactions A, 1989, 20(6), pp. 1037–1054 [2] De Mol Van Otterloo, J.L.; De Hosson J.TH.

Introduction Conducting polymers are special type of polymers with unique optical, electrical and mechanical properties [1,2], that makes them potentially useful in many applications.
The optical properties of PT based polymers are also reported to be strongly affected by the chain length of its alkyl substituents [10].
This suggest that regio-regularity only affecting the 1D charge movement, while both types becomes similar on the 3D perspective.
Wudl, Optical properties of conducting polymers, Chem.
Jow, In Electronic Properties of Conjugated Polymers Springer, Berlin, ISBN 0-387-18582-8, 1987

Khandeparkar et al. [2] have studied a part with stepped geometry (cylindrical - conical - cylindrical) using a new format that they called it hydro mechanical with support pressure.
The most important parameter affecting the forming sheet metal in hydroforming is the applied pressure path which has been studied in other papers.
Table 1 shows the properties of the used pure copper.
Table 1 Properties of pure copper sheet Density, ρ (kg/m3) Poisson’s ratio Yield stress, σ (MPa) Strain hardening exponent, n Young’s modulus, E (GPa) Flow stress (MPa) 8940 0.32 123 0.44 117 𝛔=530.98 ℇ0.4 Results and Discussion In this section, the effect of punch angle on the thickness reduction was studied.
Fig. 5(a) Different regions on the formed part (b) Conical part formed Pressure path is a very effective factor on conical workpieces forming.

Actually, aforementioned parameters affect the properties of particle damping evidently.
As a result, these factors involving inter-collisions and inter-friction should be taken into consideration in order to simulate the true operation condition for particle dampers.
The DEM simulation has been extensively developed over the years to evaluate the dissipative properties of granular materials.
When the particle damper is exerted on different positions of the beam, an obvious change of the damping properties is presented.
Esipov, Dissipative properties of vibrated granular materials, Physical Review E. 59 (1998) 4422-4425

Under the same excitation conditions, waveform characteristics including the visual cycle, the number of phases, envelope shape, amplitude ratio between the extreme values of the same reflecting interface are relatively stable due to small differences of the propagation path and dielectric properties.
Based on these parameters and th eir relative changes we can determine rock weathering and physical properties, as well as rock structural state, stress, flexibility and rock physical and mechanical properties.
Physical and mechanical statistics for rock and soil are shown in Table 1: Table 1 Physical and mechanical statistics for rock and soil Serial No.
The Correction Factor K1 for Groundwater Impact.
Use correction factor 0.15 and the total correction coefficient for surface occurrences affect K2 = 0.15.