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Online since: December 2014
Authors: Yong Li, Hao Tong, Zhi Qiang Wang, Chao Jiang Li
Table 1 Test performances of the equipment Parameter Value Parameter Value Accuracy of axes XY[μm] 2 Max speed of axis S [mm/s] 10 Stroke of axes XY [mm] 260 Inchworm stroke [mm] 120 Accuracy of axes ZS [μm] 1 Inchworm speed [mm] >4 Stroke of axis Z [ mm] 60 Max peak current [A] 50 Stroke of axis S [ mm] 120 Pulse width [μs] 1-200 continuously Rotating speed of axis R [r/min] 50~200 Pulse interval [μs] 1-200 continuously Inner flushing pressure [MPa] 0~4.2 Voltage [V] 60,90,120,150,200 external flushing pressure [MPa] 0.1 Runout error of electrode [μm] <25 when distance between electrode end lap and guide< 11 mm Table 2 Experiment parameters Parameter Value Parameters Value vlotage [V] 90 Inner flushing pressure [MPa] 3 Pulse width [μs] 16 Material of workpiece Inconel 718 Pulse interval [μs] 40 Material of electrode Brass Peak current [A] 6 Speed of axis R [r/min] 100 Working fluid Pure water Diameter of electrode [μm] 504 Fig. 6 Vertical holes
Acknowledgements This research is supported by Tsinghua University Initiative Scientific Research Program (Grant No. 20131089209), National Natural Science Foundation of China (Grant No. 51305230), Beijing Higher Education Young Elite Teacher Project(Grant No.YETP0084), Horizontal Subject Cooperating with Wuxi Micro Research Precise Machinery Technology Co.
Thole: Journal of Propulsion and Power, Vol. 22 (2006) No.2, p.249 [2] R.S.
Bunker: Journal of Turbomachinery, Vol. 131 (2009) No.4, p.041018 [3] S.H.
Kim: Materials Science and Technology, Vol. 22 (2006) No.1, p.21 [4] F.N.
Online since: November 2014
Authors: Zhang Lin Guo, Jun E Liu, Ya Zhen Hu
The analysis of contractor’s risk clause based on the FIDIC construction contract GUO zhanglin1,a, HU yazhen2,b, LIU jun’e3,c 1 GUO Zhanglin ,Department of civil engineering , North China Institute of Science and Technology, East Yanjiao,Beijing,China,101601 2 Management science and engineering, Economic management institute, Hebei University of Engineering, Handan, China; 3 LIU Jun'e ,Information school ,Beijing Wuzi University, Beijing, China 101149 aemail:gg_zz_ll@163.com, bemail:15097694812@163.com cemail:zl-je@163.com Keywords: FIDIC; Construction contract conditions; Construction contract Contractor Risk clauses; Reasonable distribution Abstract: Contractors for the construction of the risk in the contract clause clear analysis is an important content of construction project risk management.
To this, the contractor shall carefully study the landlord will provide the information before bidding and included in the cost of risk in the bid price quotations, the contractor should also recognize that this commitment is adequacy in the landlord will provide the data under the condition of the real or not deliberately hide[8]. 4.2.2 Equipment, materials and process of the risk of defects The FIDIC construction demonstration in the text stated in the contract, the contractor shall provide on our materials, equipment, technology, take full responsibility for the technical proposal is to undertake the defects caused by all risks.
Journal of international economic cooperation. 2007.04
Journal of chong-qing construction. 2007.07
Online since: June 2019
Authors: Abdelaziz Drici, Amina Laskri, Amor Boulouma, Abdelaziz Amara, Jean Christian Bernede
Yacobi, Semiconductor Materials: An Introduction to Basic Principles, Kluwer Academic/Plenum Publishers, New York, 2003
Dassanayake, Effect of post deposition heat treatment on microstructure parameters, optical constants and composition of thermally evaporated CdTe thin films, Materials Science in Semiconductor Processing 58 (2017) 51-60
Va´zquez, Electrodeposition of single and duplex layers of ZnO with different morphologies and electrical properties, Materials Science in Semiconductor Processing 13, 239 (2010) 239–244
Kanzari, Temperature effect on the physical properties of CuIn11S17 thin films for photovoltaic applications, Materials Science in Semiconductor Processing 24 (2014) 265-271
Di Domenico, Behavior of the electronic dielectric constant in covalent and ionic materials, Phys.
Online since: December 2010
Authors: Xun Ma, Ji Wei Zhang
The consumption of raw materials and fuel of China's commercial vehicle is very large.
In a given space, to solve the distribution of materials problem based on loads and constraint conditions, so that to achieve the structure which the stiffness is the largest or the displacement and stress meet the requirements [5].
In addition, considering assembly, the location of bolt holes should be given and to removal materials that interfering with the connection components movement, as shown in Fig.4.
Journal of Kunming University of Science and Technology, Vol.30 (2005), p. 77-81, in Chinese
Journal of Liaoning institute of technology, Vol. 24 (2004), p.46-49, in Chinese
Online since: August 2013
Authors: Vasile Merticaru, Marius Andrei Mihalache, Marius Ionuţ Ripanu, Gheorghe Nagit, Ionel Iulian Hurja
Through burr's size we are able to quantify and evaluate the metal sheet raw materials quality and the accuracy obtained after the stamping process has ended.
Lee, from the Technical University of Hong Kong, have conducted several tests on different types of materials and found out that as the connection radius and the clearance of the active elements increases, the same does the analyzed burr's size [6].
He has performed tests upon sheet metal raw materials and varied three input conditions: active elements clearance, active elements wear and the raw material thickness.
Walbank, The effect of using a sprung stripper in sheet metal cutting, Journal of Materials Processing Technology. 200 (2008), 176-184
Lee, The effects of tool geometry change on shearing edge finish in fine-blanking of different materials, Proceedings of the Institution of Mechanical Engineers, 217, Nr. 8 (2003), 1057
Online since: February 2018
Authors: Hui Wang, Zhao Ping Lu, Yuan Wu, P.H. Cao, X.J. Liu
The latter one is the most important method in which shielding materials becomes important, so far, heavy elements such as lead or tungsten are ideal materials to be used in radiation shielding, radiation-resistant coatings and cement-based materials, etc., among which the cement-based materials have the best comprehensive γ-ray shielding performance under technical and economic viewpoint [1,2].
Experiments Raw Materials and Cement-based Composite Preparation.
Construction and Building Materials, 28(1) (2012) 224-229
Iranian Journal of Radiation Research, 5(3) (2007) 143-146
Construction and Building Materials, 50 (2014) 177-183
Online since: March 2016
Authors: Shuang Quan Liao, Fuchun Zhao, Ai Bin Wu, Li Yue Zhang, Chao Qun Niu, Xiao Hui Wang, Kai Mei Chen
The early applied materials as barrier layer are the inorganic minerals like sulfur[3], zeolites[4].
Experimental Materials.
Fig. 3 Released curves from capsules coated with different starch content composite film materials Thermal stability.
Wang, Polymer materials and soil fertilizer, Journal of functional materials, 35(2004) 2511-2513,1517 [2] Q.
Yu, Study on controlled released Property of Urea Coated by Sulfonated EPDM Ionomer, Polymer Materials Science and Engineering, 16(2000) 64-66
Online since: September 2014
Authors: A. Serikbol, Denis V. Valuev, A.V. Valueva, V.I. Danilov
Valueva1,d 1 National Research Tomsk Polytechnic University, Yurga Technological Institute branch of Tomsk Polytechnic University 652050, Kemerovo region 2 Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences, 634021Tomsk а email: valuevden@rambler.ru, b email: dvi@ispms.tsc.ru, c email: aikosha94s@mail.ru, d email: valanna@rambler.ru Keywords: sulfide inclusions, steel, crack, heat treatment, metallographic analysis.
Research using electronic microscope was carried out to study the structural and phase and deflected mode of material of hot-forged billets.
The material was the high content of carbon and, apparently, of sulfur.
Journal of Materials Science and Technology. 29, (2013) 1025-1034
Applied Mechanics and Materials. 379 (2013) 149-153
Online since: July 2015
Authors: Tasnim Firdaus Ariff, Rubina Bahar, Mohammad Iqbal
Cost Analysis of Using Hybrid Microwave Post-Sintered Silicon Nitride Inserts Tasnim Firdaus Ariff1,a, Mohamad Iqbal 2,b and Rubina Bahar 3,c 1,2,3 Department of Manufacturing and Materials Engineering, Engineering Faculty, International Islamic University Malaysia atasnim@iium.edu.my, bmohammad_iqbal@iium.edu.my, crbahar@iium.edu.my Keywords: silicon nitride; post sintering; hybrid microwave energy; conventional heating; tool life; cost analysis, economic benefits.
The interaction of electromagnetic waves with atoms and molecules directly transfers this energy to the material [7].
Mustafizul Karim, “Study of TiC Cutting Tool Insert Using Microwave Synthesis”, Applied Mechanics and Materials, Vols.52-54, pp. 2116-2121, 2011 [6] M.
Bruno, “Evidence for microwave-induced recrystallization in NiZn ferrites”, Materials Chemistry and Physics, Vol. 101, No. 2-3, pp. 410-414, February 2007 [7] T.
Iqbal, I.Hilmy and Suryanto: submitted to Journal of Mechanical Science and Technology (in review) (2014) [9] M.P.
Online since: August 2013
Authors: Yu Xiao Zhao, Li Min Shi, Ya Li Li
As the main reinforcement fiber in advanced composite materials, carbon-fiber reinforced thermoplastic (CFRP) has long been widely used in structural materials, ablative materials and brake materials in such industries as aerospace, racing and high-end sports equipment, and is now applied to more new manufacturings.
Due to its high strength and modulus, small elongation at break, anti-creep and good fatigue durability, carbon fiber is often used as reinforcing material combined with other materials to make composite bullet proof material.
Researchers from Materials Science and Metallurgy Department of Cambridge University have developed a new type of carbon fiber, which is stronger and more solid than the current fiber for making bullet proof vest.
The new carbon fibers applied in personal protective equipment create soft, flexible, and breathable materials that can with-stand external heat and flames as well as many industrial chemicals and solvents.
Journal of Sichuan University of Science & Engineering (Social Sciences Edition), Vol.24 (2009), p. 202-206 [2] Q.