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Online since: February 2006
Authors: Charlotte Beerwald, Werner Homberg, Matthias Kleiner, Michael Marré
In comparison to this, further investigations on joints made of equal materials (AA6060) lead to low interference-fits and, therefore, to low transmittable axial forces.
Furthermore, when producing joints made of different materials (of the tube and of the ring) it turns out that the joint of AA6060 (tube) and AZ31 (ring) is more resistant than the reversed assembly (AZ31-AA6060) [19].
Furthermore, the influence of different mandrel materials is shown in fig. 12.
Therefore, it should be favorable to use a mandrel material of higher Yield strength than the tube material.
Jahrg. (1968) 9, pp. 209-215 [7] Fuss, H.; Kleiner, M.: Zylindrische Verbundwerkstücke herstellen im Aufweitverfahren, Bänder Bleche Rohre 2 pp 43-46 (1992) [8] Kleiner, M.; Weinert, K.; Hagedorn, M.; Krux, R.: FEM-Analyse der Fügeverbindung beim Rohreinwalzen, in UTF-Science III (2001), pp. 13-16 [9] Information on http://www.mausitalia.it (2005) [10] Hagedorn, M.; Weinert, K.: Manufacturing of composite workpieces with rolling tools, in Journal of Material Processing Technology 153-154, pp. 323-329 (2004) [11] Information on http://www.ecoroll.de (2005) [12] Information on http://www.stecher.de (2005) [13] Haase, V.: Eigenspannungsermittlung an dünnwandigen Bauteilen und Schichtverbunden.
Online since: March 2017
Authors: Ali Rostami, Amir Maghoul, Samiyeh Matloub, Amin Pourrezaei
It is known that the plasmon resonance is due to the collective excitation of the electrons in the materials at the specific frequency determined by the material properties and geometry of the nanostructure [10,15].
However, these models present the simple physical forms of materials which are inaccurate in the wideband optical frequency range.
The significance of the multilayer core-shell structure is that spherical core structure in nanoscale is coated by several thin layers composed of the different materials.
The goal of extraction of effective epsilon in this section is to know, how relative permittivity of the nanostructure is varied by mixing two different materials symmetrically or coating materials together and loading impurities in nanostructures.
Lee, Calculation of the Mie scattering field inside and outside a coated spherical particle , International Journal of Physical Sciences, 3(1)( 2008) 038–041
Online since: July 2008
Authors: Amit Puri, John P. Dear, Alexander D. Fergusson, Andrew Morris, I. Palmer, F. Jensen
Introduction The use of lightweight composite materials is an integral factor for aerodynamic applications, such as wind turbine blades.
Wong: In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets, Materials Science and Technology, 22 (2006), 51-60 [7] B.
Schultz: Application and analysis of sandwich elements in the primary structure of large wind turbine blades, Journal of Sandwich Structures and Materials, 9 (2007), 525-552 [9] H.
Dutton: Acoustic emission monitoring of field tests of an operating wind turbine, Key Engineering Materials, 245-346 (2003), 475-480 [12] P.
Vionis: Acoustic emission monitoring of small wind turbine blades, Journal of Solar Energy Engineering, Transactions of the ASME, 124 (2002), 446-454 [13] A.
Online since: September 2014
Authors: Chang Li, Xing Han, Bing Chen Wang
Modeling and Solution of a Nonlinear Vibration Model of the Bending-torsion Coupled spur gear transmission system based on lumped mass method Li Chang 1,a* ,Wang Bingchen1,b, Han Xing 1, c 1 School of Mechanical Engineering & Automation, University of Science and Technology Liaoning, Anshan 114051, China.
With the development of modern industries and mechanical science and technologies it is inevitable for the gear driven systems to work under the conditions of high speed, heavy duty, high temperature and approaching to limit load for a long time, and these are much more rigorous requirements for gear transmission accuracy, vibration and noise characteristics[1].
Acknowledgements This work is financially supported by National Nature Science Foundation of China (E050402/51105187), Doctor Activate Fund of Liaoning (20111059), Program for Liaoning Excellent Talents in University (LJQ2012025), and Foundation of University of Science and Technology Liaoning(2011zx03).
Gear driven technology present state and perspectives[J] , Chinese Journal of Mechanical Engineering. 1993,29(5):35-42
Beijing: Science press, 1997:10-12
Online since: January 2013
Authors: B. Dai, G.B. Yu, Y. Zhao, J.F. Nie, L. Huang
Hydraulic sealing is different the other sealing material, it has simple and compact structure.
It can be known that the hydraulic systems sealing model consists of disk, rigid shaft, journal bearing, sealing and hydraulic oil.
Acknowledgements This work was supported by the project of National Nature Science Foundation of China (No.50903082).
Supported by China Postdoctoral Science Foundation (No. 20100480997) and Supported by Hei Longjiang Postdoctoral Science Foundation (No.
LBH-Z09126) .Innovative talents of science and technology research fund project in Harbin city (No.
Online since: October 2013
Authors: Hao Li, Hai Liang Wang
Introduction Basalt fiber (BF) is one kind of typical silicate inorganic non-metallic fiber possessing characters of pollution-free, green environmental-protection[1].In comparison with other fiber, basalt fiber has following features:Good mechanical properties: BF bears a strong tensile strength which is intermediate between carbon fiber and glass fiber, higher than polypropylene fiber and aramid fiber[2]; Excellent high-temperature resistance:strength of basalt fiber still remains above 90% by heating it over 600 ˚C[3];Raw materials are abundantly available and economical in price which is about 1/10 of carbon fiber[4].
Experimental General Situation Material Properties.
The design strength for concrete is grade C70 and the cement is made from ordinary portland cement; fine aggregate is from ordinary river sand, medium sand with 2.7 fineness modulus; while graded gravel with diameters ranging from 5 mm to 31.5 mm is used in the coarse aggregate; fly-ash is the classⅡ; water reducer with 25% of water reducing rate is from the CPA polycarboxylate-based retarded high range water reducer;Material of steel tubular is No.20 steel and the seamless steel tubular is 133 mm in diameter and 6 mm in thickness.
Table 1 C70 concrete composition Strength Water cement ratio W/C Sand ratio/% Material consumption per cubic meter of concrete/(kg/m3) Water Cement Sand Stone Water reducer Fly ash C70 0.29 40 150 429 690 1026 5.19 90 Table 2 Physical and mechanical properties of basalt fiber Type Diameter /μm Length /mm Length- diameter ratio Operating temperature/˚C Tensile strength /MPa Elastic modulus/GPa Elongation ultimate /% Proportion /kg·m-3 typeⅠ 18 24 1333:1 -267~700 4150~4800 93~110 3.1 2650 typeⅡ 15 12 800:1 typeⅢ 13 6 462:1 Table 3 Parameters of specimens Specimen number Pipe outside diameter D/mm Wall thickness T/mm Length L/mm Steel ratio α Yield stress fy/MPa Confinement coefficient ξ C70-0 133 6 400 0.208 295 0.929 C70-Ⅰ-1 133 6 400 0.208 295 0.894 C70-Ⅰ-3 133 6 400 0.208 295 0.878 C70-Ⅰ-5 133 6 400 0.208 295 0.905 C70-Ⅱ-3 133 6 400 0.208 295 0.850 C70-Ⅲ-3 133 6 400 0.208 295 0.828 Notes:①Steel ratio α = As/Ac, As -cross-sectional area of steel pipe,Ac -cross-sectional area
References [1] Zhonghua Zhao, Xiaobo Liu:Construction Technology under Low Temperature.Vol.33(2011),p.5 [2] lijun Ouyang, Bin Ding, Zhoudao Lu: Fiber Reinforced Plastics/Composites.Vol.37(2010),p.84 [3] Hailiang Wang, Chunwei Chang, Xinlei Yang: Railway Engineering.Vol.51(2011),p.24 [4] Ming Tang: Concrete.Vol.32(2010),p.76 [5] Sumei Zhang, Yuyin Wang: China Civil Engineering Journal.Vol.9(2004) ,p.1 [6] Feng He, Xuhong Zhou, Changhui Tang: Engineering Mechanics.Vol.17(2000),p.61 [7] Juan Chen, Yiyan Lu, Bin Li: Engineering Mechanics.Vol.28(2011),p.115 [8]Wenbo Gao, Xiaoguang Wang: Engineering Journal of Wuhan University.Vol.35(2002),p.70 [9]Shantong Zhong: Steel-tube concrete structure ( Hei Longjiang Science and Technology Publishing House, Ha Erbin1994 )
Online since: December 2010
Authors: Yin Fang Jiang, Yi He, Yan Ling Lai
Secondly, the material parameters will be procured in thermoforming of connecting-rod slab by thermally simulated test.
Fig. 2 The hot forging drawing Fig. 3 Plasticity diagram of deformation and temperature The Establishment of 3D Model and Thermoforming Material Parameters The material for study in this paper is a new aluminum alloy, alloy elements are basically consists of Cu and Si and certain amount of rare earth elements.
[5] Zhang Changchun, Kong Weiyi: Agricultural Machinery Journal, 1996, 27 (2), pp:128~132
[7] Wang Bin, Yi Danqing: Journal of Central South University Vol. 40 (2009), pp: 123~128
[9] Hu Hongjun, Yang Mingbo, Material Science and Technology, Vol. 14 (2006), pp: 293~295.
Online since: May 2013
Authors: Xiu Hong Liang, Xiao Ye Fu
Effect of the Ce-doped TiO2 on the Photocatalysis Degradation of MB Xiaoye Fu and Xiuhong Liang * 1Institute of Power Source & Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China *liangxiuhong071@163.com Key Words: TiO2, Ce-doped TiO2, photocatalyst, sol-gel method, crystal form Abstract.
Introduction: Since Fujishima and Honda [1] discover the surface of radiatived TiO2 can photodecomposition water in 1972, the representative nano-dimension semiconductor multiphase photocatalytic materials such as TiO2, WO3, CdS, ZnS, ZnO, Fe3O4 etc, have been studied extensively.
Experiment 2.1 Material preparation In the experiment, Ti(OC4H9)4, ethanol absolute, glacial acetic acid, distilled water and salpeter solution are used.
Liu: Journal of the Chinese Society, Vol. 37 (2009), p.1458-1463 [4] Y.C.
Song, et al.: Journal of Synthetic Crystals, Vol. 37(2008), p.427-430
Online since: October 2015
Authors: Somkiat Tangjitsitcharoen, Panrawee Yaisuk
,in:Advanced Material Research (2011), p.335-336 [2] S.
Tangjitsitcharoen, in:Advanced Materials Research199-200 (2011), 1958-1966 [4] Dr.
Ratanakuakangwan: submitted to Journal of Applied Mechanics and Materials, vol. 490-491(2014): p. 207-212 [6] Feng Jiang, Jianfeng Li, Yiming (Kevin) Rong, Jie Sun1 and Song Zhang, The 41st CIRP Conference on Manufacturing Systems (2008) [7] Prof.Dr.
Szabó, Seminar “ModerneSchleiftechnologie” Villingen-Schwenningen (D) (2000) [8] LIU Yi-jian, ZHANG Jian-ming, WANG Shu-qing:submitted toJournal of Zhejiang University SCIENCE(2005), p.1026-1029 [9] DimitriosVakondios, PanagiotisKyratsis, Suleyman Yaldiz and Aristomenis Antoniadis, Measurement 45(2012), p.1480–1488 [10] AbdallahNasri, Mihed Ben Said, WassilaBouzidSai, Emirates: submitted to Journal for Engineering Research16 (2011), p.67-78 [11] Xiaoxiao Chen, Jun Zhao, Yueen Li, Shiguo Han, Qingyuan Cao and Anhai Li, Int J AdvManuf Technol59(2012),p.885–898 [12] Kwak JS, Int J Machine Tools Manuf(2005), p.327–334 [13] Kincl M, Turk S. andVrecer F, Int J Pharm(2005), p.39–49 [14] Gunaraj V. andMurugan N.
Online since: October 2010
Authors: Ru Xin Che, Bing Yu, Shuo Wang
For example, nano-FexOy can be prepared, using some iron compounds (such as ferric citrate, iron oxalate, etc.) as raw materials by burning [2].
Yan Xin and co-works [3] have successfully used ferric citrate as raw material in the 400 ℃ - 600 ℃ for 3-5 hours to prepared γ-Fe2O3 and α-Fe2O3 with the diameter of more than 10 nm.
Experimental Experiment principle Organometallic compounds have been widely used as the precursor of metal organic chemical vapor deposition (MOCVD) method in the preparation of the nano-thin film materials because they have low melting point, are always volatile and easy to decompose and soluble in organic solvents.
Journal of Thermal Analysis and Calorimetry, 2003, 74 (2): 485~490
Journal of the Ceramic Society of Japan 104(1214), 949-952, 1996-10-01