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Studying Mechanical Properties Specially Fatigue Behavior of (Polyether Ether Ketone)/Glass Fiber Composites in Aerospace Applications Prof.
Abstract: This work deals with studying the mechanical properties specially fatigue behavior for high performance composite materials of poly ether ether ketone (PEEK)/glass fiber, which are used in Aircraft Industry.
The tests show inhomogeneous results, so it is necessary to do many repetitions to get a more accurate estimate of fatigue life. [6[ Composite materials behavior subjected to fatigue load is very complex due to non-homogeneous and anisotropic properties, and it has been studied for a long time; however, composite materials design is still based on very long fatigue tests and high safety factors are used.
S-N curves of the composites generally depend on several factors]6, 11, 12 [: • Material and fiber volume fraction (Vf); • Matrix (resin); • Guidance plan; • Test variables: • Load type; • Average stress; • Frequency; • Environmental conditions.
Oğuzhan Yılmaz, Fatigue Properties Of Materials, http://www.gantep.edu.tr/~oyilmaz [13].

Producing castings with fine microstructure is generally associated with improved mechanical properties of strength and ductility and with minimal defects such as cracks and hot tearing.
It is the aim of the current work to understand more the effect of the process parameters on the altering the microstructure and mechanical properties.
Properties of 1040CR steel mold and for Al-12.6%Si can be found elsewhere [19, 20].
While the cooling at the mold-casting has improved moderately at a frequency of 500Hz and drastically at 2000Hz, it was concluded that the very small vibration amplitude is the key factor in affecting the heat transfer between the casting and mold.
[19] Metals Handbook, Vol.1 - Properties and Selection: Irons, Steels, and High-Performance Alloys, ASM International 10th Ed. 1990

These defects are affected by the forming parameters such as material properties, the friction coefficientμ, the die semi-cone angle α, the reduction ratio Rf/R0 .This paper has analyzed the influence of aforementioned parameters on the sinking process design, and a new method, multi-step sinking process, is presented.
However, in contrast to tube sinking, besides wrinkling at the end and compressive instability on the cylinder wall, there is a typical defect: buckling instability of the top, which is an important factor affecting cylindrical cup sinking process design (shown in Fig.2).
The factors affecting the process are the material properties, the friction coefficient μ, the die semi-cone angle α, the wall thickness t, the reduction ratio K and the initial radius R0 .
Fig.4 The forming limit diagram for the instability deformation of the top vs. the end with different die semi-cone angleα Fig.3 Mechanical model and analysis of force Mechanical analysis of cylinder sinking The mechanical model of cylindrical cup sinking is divided into two zones as in Fig.3.
Considering the above-mentioned two factors, the double-cone angle sinking scheme is taken: first the die semi-cone angleαis150 , then the die semi-cone angle transits to 450 , see Fig.12.

The strength parameters of granular coarse-grained soil are the critical factor that affects the stability of ultra-high dump.
Therefore, the strength parameters of coarse-grained soil are the main factor to affect the stability of super-high dumping.
Jingshan Jiang's studies on coarse-grained soil showed that the soil particle composition and the geometric arrangement and forces (ie, fabric)between particles of coarse granular soil were the fundamental reason that induced the macro-mechanical properties to be complex and led the macroscopic mechanical properties of coarse grained soil to show strong dispersion characteristics[1-2].
The influencing factor of shear strength can be broadly divided into two kinds[3]:1) The influencing factors can be controlled by human (such as test site, load-applying manner, sample size, confining pressures, strain rate, drainage condition and the factors related with the material properties, etc.). 2) The affecting factors beyond human control: the initial fabric of sample grain. with the help of the traditional laboratory test method, the influence of artificial control factors on the strength of coarse-grained soil had been thoroughly studied in order to obtain relatively reasonable values.
[4] GUO Qing-guo.Engineering Properties and Applieation of Coarse-grained Soil[M].Zhengzho:Yellow River Water Conservancy Press,1999

The joint influence of raw mixture, the parameters of pressing and the conditions of hardening on the indicators of material properties has been investigated.
There was given a quantitative assessment of the individual components contribution of the raw material composition to the indicators of the physical and mechanical properties of the material.
The prevailing factors, affecting the properties of hyper-pressed materials, are the consumption of Portland cement and the water-solid ratio of the molded mixture.
Ramli, Effect surface treatment of recycled concrete aggregate on properties of fresh and hardened concrete, 2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC), Langkawi. (2013) 651-656
Ren, Experimental research on mechanical properties of recycled aggregate concrete, 2011 International Conference on Multimedia Technology, Hangzhou. (2011) 1539-1542

Comparison of the Mechanical Properties of Hastelloy X Material after Welding by GTAW and Nd-YAG Laser Shih-jeh Wu 1 , Chao-Wei Du and Chen-Ming Kuo 2 Department of Mechanical and Automation Engineering I-Shou University 1 Section 1, Hsueh-Cheng Rd.; Ta-Hsu, Kaohsiung 84008, Taiwan Email: 1wsj007@isu.edu.tw, 2cmkuo@isu.edu.tw Keywords: Gas Tungsten Arc Welding (GTAW), Nd-YAG laser welding, Hastelloy X, Tensile Property Testing, X-ray diffraction.
The superior properties at high temperature (e.g. creep resistance, corrosion resistance, and thermal fatigue) have consistently improved the performance of aircraft engines.
Weld quality is a function of many factors: the type and quality of metal deposited, the heat treatment inevitably experienced by deposited metal and by the parent metal around the weld (the Heat-Affected Zone), and the residual stresses left in both the parent and deposited metal.
Temperature and temperature distributions affect expansion and contraction and the relationship between stress and strain and thus, residual stresses.
In this study, we study the mechanical properties of the Hastelloy X alloy under two different welding methods i.e., GTAW (Gas Tungsten Arc Welding) and Nd-YAG Laser.

Unfortunately, the Egyptian faience objects subject to many deterioration factors, especially humidity.
Unfortunately, most of those faience objects suffer from several decay features related to the deterioration factors that affect the different components of faience.
The mechanical properties of the treated and untreated samples were determined by testing their compressive strength.
Mechanical properties The mechanical properties of the treated and untreated faience samples were determined by testing the compressive strength.
[13] Rehren, T., A review of factors affecting the composition of early Egyptian glasses and faience: alkali and alkali earth oxides, Journal of Archaeological Science, 35, (2008), pp.1345-1354

Effect of Medium Viscosity on the Lift Performance of Full-metal Single Screw Pump Junfei WU1, a, Jinmei KAN1,b,Fanguo Meng1,c ,Benliang YU1,d 1College of Electromechanical Engineering,Qingdao University of Science and Technology Qingdao 266061,China ajfw_2002@sina.com, b694157316@qq.com, c813991893@qq.com,dyubenliang@sina.com Keywords:full-metal single screw pump;viscosity; performance ;numerical simulation;fluid dynamics Abstract: To deal with the complicated spiral surface of screw pump,this article uses Pro/E to build geometry model.And it improves the method of the grid topology to use the dynamic grid ideas.At the same time,using the method of Computational Fluid Dynamics to numerical simulation for full-metal single screw pump,analysis and study that viscosity affect leakage properties,the torque of surface of rotor and the volumetric efficiency.
Introduction The main performance parameters of full-metal single screw pump are volume flow, pressure of import and export,screw speed, the input power, medium viscosity and temperature, etc.Flow is Mutual influenced by many factors.Viscosity of the medium is affected by the temperature of the medium.The leakage of the pump is a function of the parameters.Designing the parameters of the pump must comprehensively consider the effect of these parameters.The field test research in the aspect of full-metal single screw pump performance needs higher economic costs, and the numerical simulation method shows its efficiency and simplicity.This article using the method of Computational Fluid Dynamics to numerical simulation for full-metal single screw pump,analyzes and studies that viscosity affect leakage properties,the torque of surface of rotor and the volumetric efficiency. 1 Modeling and Meshing We use Pro/E to establish geometric model of GLB500 type full-metal single screw pump and computational
Fig.1 Screw pump assembly schemes 2 The applied load and the analysis of the results 2.1 Viscosity affecting the performance of leakage Viscosity is one of the important factors which affect the efficiency of full-metal single screw pump.
Master thesis, Department of mechanical and mechatronic engineering.

The coefficient of thermalexpansion (CTE) is one of the material factors affecting the behavior of concrete structures.
Literature Review Oshima et al.[1]experimentally investigated the thermal and temperature-dependent mechanical properties of polymer concrete.
Koyanaki, Thermal Properties and Temperature Dependency of Mechanical Properties of Resin Concretes for Structural Use, Proceedings of the 10th International Congress on Polymers in Concrete, Honolulu, Hawaii (2001) Paper 76 [2] C.
Daniel, Mechanical and Thermal Properties of Graphite Platelet/Epoxy Composites, Polymer 45 (2004) 8211-8219 [5] P.
Neville, Properties of concrete, Fourth Edition, John Wiley & Sons Inc., (1996) 418-419 [11] A.

It should be noted that on the lowest stiffness (0,5 kPa) the mechanical properties do not significantly affect the organoid size during the development.
Investigation in neural tube growth in 3D tailored synthetic matrix also has been conducted to see how the mechanical properties affect the artificial system[1].
In this system, the mechanical properties do not affect significantly the organoid size during the development.
It has been reported that mechanical properties affect multicellular tumor growth embedded in the matrix using agarose based[27].
For future works, it could be suggested to perform not only mechanical properties but also various cues that influence organoid growth such as soluble factors, extracellular matrix components, and degradability.