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Online since: May 2012
Authors: Ke Chun Sun, Wei Jun Zhang
Comparative Analysis of the Measurement Methods of Bound Water Content in Municipal Sewage Sludge Weijun Zhang 1, a , Kechun Sun1,b 1 the Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang, China ajgzwj@126.com, bskchun@163.com Keywords: Bound Water Content, Sludge, Measurement Methods.
Centrifugal sedimentation method, at high rotating speed, has some limitations for a viscoelastic material, such as activated sludge.
Acknowledgements This work was financially supported by Luoyang Institute of Science and Technology, Program of Science and Technology Department of Henan Province Commission (112102310661).
Bulletin of National Science Foundation of China, 2002(5): p. 284-286.
Journal of Chemical Engineering of Japan, (1992), 25(1): p. 100-103
Online since: January 2014
Authors: Yan Fang Yue, Zhi Bo Xin, Jin Ye Wang
Finite Element Analysis for the Welding Column of CNC Boring Machine YUE Yan-fanga, XIN Zhi-bob and WANG Jin-yec School of Mechanical & electrical Engineering, Hebei University of Science & Technology, Shijiazhuang, Hebei 050018, China ayanfangyue@126.com,bxinzhibo100@163.com,cwangjinye3@163.com Keywords: Welding Column of CNC Boring; Finite Element Analysis; Stress; Strain Abstract.
The Column choice Q235 steel as welding material, select the corresponding coefficient of material is: the elastic modulus is EX = 2.06 x 1011 pa; Poisson's ratio PRXY = 0.3; Density of ρ= 7.8 kg/m2.Form of meshing using intelligent, the Smart Size level set to 4.After meshing, node number is 794859, unit number to 425253.Finite element model is shown in figure 2.
Stress concentration occurs in the ribs of column bottom plate, the maximum stress is 87.4684MPa, and it far less than the material allowable stress 235MPa.
In order to lose weight and reduce material waste to optimized the structure of column.
AIAA Journal, 2004,42(3):622-630
Online since: June 2014
Authors: Fathoni Usman
The Plot of the stress against ratio of hw/tw from FEA results Adding the coefficient k and incorporate the material properties, E = 2.05 x 106 N/mm2 and n = 0.3, the Eq. 10 becomes: (12) The results from the numerical analysis assumed the models are in Elastic-Isotropic material.
With that assumption, Eq. 12 is sufficient when the material is in linear elastic stage, Therefore Eq.12 can be determined as the elastic critical shear stress, tcre.
Inelastic buckling occurs after the stress exceeded the proportional limit of the material and before the stress reaches the ultimate strength [3].
Yuen, The Influence of Boundary Conditions on the Shear Buckling Behavior of Thin Corrugated Plates, International Conference on Advances in Steel Structures, Elsevier Science (1996) 709-714
Hamilton, Shear Strength of Beams with Corrugated Webs, Journal of Structural Engineering (1996)
Online since: June 2011
Authors: Brendan O'Flynn, Michael Hayes, Cian O'Mathuna, Ning Ning Wang, Wen Si Wang
The Seebeck effect enable this device generates electric potential when a temperature difference applied across P-N junctions of thermoelectric material in TEG device.
Furthermore, the Seebeck coefficient of most commercial off-the-shelf thermoelectric material can only create voltage of the order of micro volts per Kelvin, the voltage difference provided by the TEGs are insufficient to directly power WSN.
However, the size of mechanical manufactured Bismuth telluride thermopiles is difficult to scale down further in the foreseeable future due to the characteristics of the material and manufacture process.
Sensors Journal, IEEE 8(6): 678-681
Wang; Jafer, E.; Hayes, M.; O'Flynn, B.; O'Mathuna, C.; , "Autonomous wireless sensor network based Building Energy and Environment Monitoring system design," Environmental Science and Information Application Technology (ESIAT), 2010 International Conference on , vol.3, no., pp.367-372, 17-18 July 2010
Online since: December 2013
Authors: Ju Zhang, Kun Hua Zhong, Lei Feng Liu, Yuan Yao, Yu Wen Chen
Testing and experiment We implemented a simple animation material resources retrieval system, to verify the Click-Tracking Network.
Each animation material resource has a name, description of material resources and the corresponding resource link address attribute.
According to the query condition, the system returns the animation material resources query address and the calculated scores which match the query.
Acknowledgement This work was supported by National Science and Technology Ministry(2013BAH25F02) and(Y21Z070E10 ) References [1] V.
Luhn:IBM Journal of Research and Development, vol. 1(4), pp. 309–317, 1957
Online since: January 2013
Authors: Hao Hu, Jia Ning Zheng, Dao Zheng Huang
Introduction The supply chain is a worldwide network of suppliers, factories, warehouses, distribution centers, and retailers through which raw materials are acquired, transformed, and delivered to customers.
Generally, Shipbuilding Supply Chain is an integrated functional network chain structure, which based on the shipbuilding companies as the core, through the control of information flow, capital flow, and logistics, starting from the procurement of raw materials, the manufacturing ​​of the intermediate products and the final products, and the final delivery, which connect the suppliers, shipbuilders and the ship-owners [2].
Science Technology and Engineering, 2008 Vol.8 No.15, pp. 4264-4269
International Journal of Manufacturing Technology and Management.
Online since: March 2012
Authors: Ping Yang, Wei Wei, Qian Hong He, Quay Le Chen
Thermal analysis and cooling optimization of the built-in micro projector Wei Wei1,a, PingYang1,b, Qianhong He1,c and Quayle Chen2,d 1School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China 2Nokia Research Center Beijing, Beijing,100176,China aweiwei2508402031@163.com, bping@uestc.edu.cn, crobin_hqh@126.com, dquayle.chen@nokia.com Keywords: micro projector; thermal analysis; LED; cooling optimization Abstract.
The material parameters of LED package are shown in Table.1.
FPCB substrate Copper metal Thermal grease Ceramic layer Copper heat sink Thermal conductivity [W/(m·k)] 0.36 385 6 10.31 385 Radiation coefficient 0.92 0.04 - - 0.04 Table.1 The Material parameters of LED package DMD chip.
Make simplifications and assumptions as follows: LED and DMD chip are the thermal sources of the micro projector, so ignore the heat generated by the current through the passive components and attachments; Ignore the thermal properties of optical components, such as lens and optical integrators, and they can be defined as modules which have no heat and no thermal conduction; Assume that every material of the micro projector is isotropic and has uniform thermal conductivity, and the density value of every material takes an average; Boundary conditions: the ambient temperature is 25℃, 1 atm, ρ=1.185kg/m3, CP=1005J/(kg·K), ν=15.53×10-6m2/s, Pr=0.702kg/m3.
[5] Zhou Jing-xian, Wu Rong-zhi, in: Digital Micromirror Device (DMD), edited by Chinese Journal of Liquid Crystals and Displays (2003)
Online since: July 2012
Authors: Yi Yun Yuan, Da Peng Yang, You Dong Ye, Qi Jun Wu
The SIC/CAS of CMCs was simulated from the material parameter from table 1.
Table 1 SiC/CAS material parameter Young’s modulus of the fiber (GPa) 200 Young’s modulus of the matrix (GPa) 97 Fiber radius 7.5 Volume fraction of the fiber 0.37 Fiber possion ratio 0.2 Matrix possion ratio 0.2 The thermal stress(MPa) 8913 Interfacial shear stress (MPa) 10 Interfacial debonding energy () 1.4 The final stress of the matrix satutated crack (MPa) 250-260 From the above material parameter, the stress/strain curve can be simulated, and the effect of the debonding stress to the curve can be analysed.
The improved Monte Carlo simulation has been made according to the material parameter from table1, which was compared to the Beyerle’s experiment.
B. , Hutchinson, J.W. and Evans, A.G., 1986, "Matrix Fracture in Fiber-Reinforced Ceramics," Journal of-Mechanics and Physics of Solids, Vol. 34,NO. 2, pp. 167-189
Solti, “Modeling of Progressive Damage in Fiber-Reinforced Ceramic Matrix Composites,” AD 96-2 [6] Miaoyan matrix failure model of the ceramic matrix composites Nanjing University of Aeronautics and Astronautics,master's paper . (2007) [7] Aveston, J., Cooper, G.A., and Kelly, A., Single and Multiple Fracture, The Properties of Fibre Composites, IPC Science and Technology Press, Surrey,England, 1971, 15-26
Online since: October 2011
Authors: Yuttachai Keawsuntia, Cheevin Limsiri, Thamrong Prempridi, Sanguan Patamatamkul
Since raw materials used for energy generation such as oil, coal and natural gas will be used up in the near future.
For example, the materials used in constructions are cheap and the technologies involved are conventional.
Solar Chimneys, Encyclopedia of Physical Science and Technology. 3rd ed.
International Journal of Renewable Energy Engineering, Vol. 3, No. 2, (2001) [6] Koonsrisuk, A. and Chitsomboon,T.
Online since: September 2007
Authors: Shoichi Kikuchi, Yutaka Kameyama, Kengo Fukazawa, Jun Komotori
The Effect of Hybrid Surface Modification; Combination of Fine Particle Bombardment Treatment and Nitriding, on Fatigue Properties of Steel Shoichi Kikuchi1, a, Jun Komotori2, b, Yutaka Kameyama 1, c and Kengo Fukazawa3, d 1 Graduate school of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kouhoku-ku, Yokohama-shi, Kanagawa, 223-8522, Japan 2 Department of Mechanical Engineering, Keio University, 3-14-1, Hiyoshi, Kouhoku-ku, Yokohama-shi, Kanagawa, 223-8522, Japan 3 Neturen Co., Ltd.
Introduction Since a fatigue crack is initiated at the surface of material, surface of mechanical parts are commonly strengthened by surface modification process to improve fatigue strength.
However, when a surface is strengthened by some surface modification process, fatigue cracks can be initiated from non-metallic inclusions located within the material (internal fracture mode).
Experimental procedure Material used in this study was AISI 4135 chromium molybdenum steel.
As a result, in the NF series, internal fracture occurred at the non-metallic inclusion inside the material, though they possessed a notch.
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