Search results

As we know, bush-burning is one of the main forms of the engine failure or even damage due to the Inadequate supply or partial lack of oil between crankshaft main journal and crankshaft bearing as well as the rod journal and rod bearing in a high temperature and high speed working environment.
Using the default solver of FLUENT, and setting the operating pressure to a standard atmospheric pressure, without considering the acceleration of gravity, choosing engine oil from FLUENT material library as the fluid, setting the initial temperature to 25℃, taking the energy equation into consideration and based on SIMPLE algorithm, then conduct the flow field simulation.
Compared to the flow field of the clearance between rod journal and bearing shell, the effective flow cross-sectional area is enlarged because of the tank between the crankshaft main journal and bushing, so that the overall average oil flow velocity becomes larger, majority of the oil flows directly along the tank with little from the major arc.
Acknowledgements The authors gratefully acknowledge the financial support from the National Natural Science Foundation of the P.
[4] Yong Li, Zhiyou Liu and Yijie An: submitted to Journal of Hydrodynamics, 2001, 16(2): 254-258, in Chinese.

Badawia Faculty of Science, Physics Department, El-Minia University, Egypt aemadbadawi@yahoo.com Key words: 2024 Alloy, Activation Energy, Electrical Measurements, Isothermal Annealing, Positron Lifetime Technique Abstract Positron annihilation lifetime (PAL) measurement is one of the most important nuclear techniques used in materials science.
Electrical measurements are also used in materials science.
Stott: Canadian Journal of Physics, 52 (1974) 759 [8] W.
Badawi, Journal of Materials Science and Engineering, 5[3] (2011) [16] W.
Brown: Journal of Applied Physics, 22 (1951) 1012 [17] I.

With the evolution of modern science and technology, composite material is widely used in more and more fields.
Trivedi, EMI shielding: methods and materials—a review.
Journal of Applied Polymer Science, Vol. 112 (2009), p. 2073-2086
Advanced Materials, Vol. 15 (2003), p. 1918-1921
Materials Science Forum, Vol. 936 (2018), 136-141

Study on Absorbing Properties of Honeycomb Absorbing Materials Hui-min SUN1,a, Zhao-zhan GU1,b and Ran-ran YANG1,c 1Nanjing University, College of Electronic Science and engineering, Nanjing 210093, China awhhyshm__1016@sina.com, btommygu@nju.edu.cn, cyangranrannju@gmail.com Keywords: honeycomb absorbing materials, electromagnetic parameters, dip-coating.
Honeycomb absorbing materials belong to structural absorbing materials.
Zeng, et al: Packaging Journal.2(2010),p.21-23 [4] D.
Berry, et al: Journal of Mechanical Engineering Science.221(2007),p.753-767 [5] L.
Liu: Journal of Aeronautical Materials.20(2000),p.187-191 [6] K.

Scheme of the nylon seal · Physical and mechanical properties of materials [7] are given in table 1: Table1.
Mechanical properties of materials Material Young’s modulus E, GPa Poison’s ratio ν Density ρ, kg/m3 σp, MPa σc, MPa PMMA 3.3 0.32 1190 82 125 Nylon 2.8 0.4 1150 — — Aluminum 70 0.33 4510 — — Loads and boundary conditions · The radius of the outer surface of the sphere R0=845mm; · The radius of the inner surface of the sphere Ri=737.5mm; · The angle of the upper hatch; · The angle of the bottom plate;; Internal working pressure P1 = 1 atm. (0.1 MPa); · External hydrostatic pressure P2 = 89.6 atm. (8.96 MPa - corresponds to a pressure of 900 m); · The interface conditionis met at the media contact boundary: σn1+σn2=0;u1=u2; · The material is considered in two cases as: o Linear material o Non-linear material.
The research was supported by the Russian Science Foundation (project no. 21-71-20020).
Zuev, On the design of deep-sea optical elements made of PMMA, IOP Conference Series: Materials Science and Engineering 734 (1) (2020) doi:10.1088/1757-899X/734/1/012069
Wei-Hao, A Uniform Viscoelastic-Plastic Constitutive Model for MD-PMMA at a Wide Temperature Range, Journal of Research Updates in Polymer Science. 4 (2015) 139-148

Nanotechnologies of Strength Control of Materials Victor V.
Tarasenko, Brittle strength conditions of isotropic materials, Journal of Mining Institute 36(3) (2018) 146-156
Kuten, Analysis of acoustic emission parameters changes with the growth of fatigue racks in steel samples, Materials Science Forum 970 (2019) 137–144
Manzhikov, Damage accumulation model for solids and the catastrophy prediction for large-scale objects, Journal of Mining Science 46(4) (2010) 384-393
Sultonov, M.Z Rustamova, Changes in structure of natural heterogenous materials under deformation, Journal of Mining Science 45(4) (2009) 355-358

Introduction FG materials are one of the latest advanced materials composed of two or more different materials.
For the simplest models of viscoelastic materials i.e.
Riedel, Processing techniques for functionally graded materials, Material Science and Engineering A, 362, 2003, 81-106
Space applications of advanced structural materials (1990).
Venkateswara Rao, Free Vibration Analysis of Functionally Graded Beams, Defence Science Journal, Vol. 62, No. 3, 2012, pp. 139-146.

FTIR showed the successful synthesis of the three materials.
Journal of Hazardous Materials, 2002. 92(3): p. 315-326
Journal of Membrane Science, 2008. 310(1–2): p. 402-408
Journal of Polymer Science Part A: Polymer Chemistry, 1991. 29(8): p. 1197-1202
Materials, 2012. 5(8): p. 1487-1494

Review on Development and Application of Gelled Material Filling Mined-out Area Yong Liua, Jie Chenb Xi’an University of Science and Technology, Xi’an 710054,China aliuyong.love.com@qq.com, bchenjie363@163.com Keywords: Filling cementing materials, cement, High water quick-setting material, The fly ash, Blast furnace slag, Cementing filling material Abstract.
bTo broaden the sources of raw materials.
[7] Chuanqing Zhao, Hu Nailian.Filling the development and application of cementing materials [J].Journal of gold,2008(1):25-29
[13] Feng Juen,Guo Shengmao.The application of fly ash as filling cementing materials research [J].Journal of comprehensive utilization of fly ash,2001(5):10-11
Journal of liaoning university of engineering science, 2006,25(6):904-906.

The study of carbon materials prepared by Zhaotong anthracite under Ultra-high temperature Jia-qing Yang 1,a Shu-he Lu 1,2,b * Xiao-hu Hua 1,2,c Xiao-gang Wang 1,2 Li-bin Niu 1,2 Zi-min Fan 1,2 Jia-bo Wang 1,2 1School of Materials Science and Engineering, Xi 'an University of Science and Technology, 710054 Xi'an, Shaanxi 2Shaanxi Engineering Research centre of Energy Saving and Polygeneration in Silicon & Magnesium industry 710054 Xi 'an, Shaanxi a283574475@qq.com,blsh198571@126.com, chxh85587373@126.com Key words: Zhaotong anthracite, Ultra-high temperature, Graphitization, Carbon materials Abstract: In this paper, reporting a new way to directly  prepare quality of carbon materials such as artificial graphite, like-graphitization carburant and senior carbonaceous reductant et al ,which is prepared from anthracite under ultra-high temperature without any other additional process and catalyst.
Acknowledgements Yunnan Province scientific and technological project (201440), Yulin City scientific and technological project (201346) and Xi'an University of Science and Technology nurture Fund (201303) References [1]X.Z.Wang,N.Liu, and H.Hu, etc: Journal of new carbon materials.
[8]Y.J.Xu:Journal of coal processing and comprehensive utilization.
Vol.147(2013)No.3, p.60-65 (In Chinese) [9]B.L.Zhang: Journal of nonferrous mining and metallurgy.
Vol.201(2008)No.4,p.14-20(In Chinese) [12]J.C.Duan ,X.G.Zhuang, M.C.He: Journal of geological science and technology intelligence.