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Online since: September 2019
Authors: Vasily Y. Belyankov, Aleksandr E. Goldshtein
One of the most important tasks of testing, which is effectively resolved with use of SECP, is thickness measuring of a pipe wall made from electrically conductive nonmagnetic materials, as well as of dielectric coatings of these pipes or the air gap between SECP and the surface of a pipe [1, 4, 5].
The FEM advantages in solving real problems are the versatility of usage, arbitrary form of the treated area, the absence of necessity for the object approximation to standard geometric shapes, the ability to solve unsymmetric problems based on irregularity of materials and media parameters [2, 9, 10].
A widespread drill pipe from nonmagnetic material with a nominal outside diameter D = 147 mm was taken, specific conductance σ varied in the range of (10...25) MS/m, wall thickness T in the range of (5...15) mm, the distance between the SECP measuring coil and the pipe surface in the range of (3...15) mm.
Technical and economical opportunities (Iceland: The school for renewable energy science) 126 [7] M.
Lichuan, Coil impedance calculation of an eddy current sensor by the finite element method, Russian Journal of Nondestructive Testing 44 (2008) 296
The FEM advantages in solving real problems are the versatility of usage, arbitrary form of the treated area, the absence of necessity for the object approximation to standard geometric shapes, the ability to solve unsymmetric problems based on irregularity of materials and media parameters [2, 9, 10].
A widespread drill pipe from nonmagnetic material with a nominal outside diameter D = 147 mm was taken, specific conductance σ varied in the range of (10...25) MS/m, wall thickness T in the range of (5...15) mm, the distance between the SECP measuring coil and the pipe surface in the range of (3...15) mm.
Technical and economical opportunities (Iceland: The school for renewable energy science) 126 [7] M.
Lichuan, Coil impedance calculation of an eddy current sensor by the finite element method, Russian Journal of Nondestructive Testing 44 (2008) 296
Online since: January 2014
Authors: Shu Ran Lv, Qing Nan Wei
Input material parameters into the model to establish finite element calculation model of three working conditions, as shown in figure 2.
[3] Liu Houxiang, J. (2008): Journal of vibration and shock, 27 (1): 65-92
[4] Zhang Feng, Guo Xiaoxia, Shao Lei, J. (2010): Journal of disaster prevention and mitigation engineering, 30 (3): 281-286
[5] K.wang, Duan Xixiang, Yang Yi etc, J. (2008): Journal of Kunming University of Science and Technology, 8 (4): 6
[6] Shen Shanshan, J. (2010): Journal of Nonferrous Metals (Mining Section), 62(2): 56-59.
[3] Liu Houxiang, J. (2008): Journal of vibration and shock, 27 (1): 65-92
[4] Zhang Feng, Guo Xiaoxia, Shao Lei, J. (2010): Journal of disaster prevention and mitigation engineering, 30 (3): 281-286
[5] K.wang, Duan Xixiang, Yang Yi etc, J. (2008): Journal of Kunming University of Science and Technology, 8 (4): 6
[6] Shen Shanshan, J. (2010): Journal of Nonferrous Metals (Mining Section), 62(2): 56-59.
Online since: September 2013
Authors: Xiong Duan, Xing Dong, De Yu Li
Table 1 Process parameters for paint removal by ice jet
Parameter
test1
test2
Ice flow rate(kg/min)
0.19
0.19
Blasting pressure(MPa)
0.2,0.3,0.5,0.7
0.7
Exposure time(second)
7
3,5,15
Impact angle(angular)
90
90
Stand-off distance(cm)
10
10
Preparation of Samples and Measurement of Adhesive Strength of Coatings.Seven 2A12 samples were supplied in the form of disks of dimensions Φ400×5. 2A12 was typical material used as mask on airplanes.
“An environmentally safe and effective paint removal process for aircraft” Journal of the Minerals, Vol.23, pp20-21.2001 [4] Randall B.
“An environmentally safe and effective paint removal process for aircraft” Journal of the Minerals, 23 Vol. 53, Issue 3, pp20-21.2001 [6] Terry Foster.
“Study on the technology of ice particle making for ice jet” Journal of China Coal Society, Vol.34, pp129-132.2009 [8] A.W.
[9] Krzysztof Kluz, “Application of ice-air jet blasting in treatment of sensitive surfaces” International Journal of Abrasive Technology, Vol.1, No.1,pp59–77.2007 [10] ISO2409-2007.
“An environmentally safe and effective paint removal process for aircraft” Journal of the Minerals, Vol.23, pp20-21.2001 [4] Randall B.
“An environmentally safe and effective paint removal process for aircraft” Journal of the Minerals, 23 Vol. 53, Issue 3, pp20-21.2001 [6] Terry Foster.
“Study on the technology of ice particle making for ice jet” Journal of China Coal Society, Vol.34, pp129-132.2009 [8] A.W.
[9] Krzysztof Kluz, “Application of ice-air jet blasting in treatment of sensitive surfaces” International Journal of Abrasive Technology, Vol.1, No.1,pp59–77.2007 [10] ISO2409-2007.
Online since: December 2010
Authors: Wei Cai, Zhao Hui Wu, Jian Yang, Qiang Zhang
Acknowledgment
This material is based upon work funded by Zhejiang Provincial Natural Science Foundation of China under Grant No.Y1100673.
ASHRAE Journal.
International Journal of Refrigeration.
Yan, International Journal of Refrigeration.
International Journal of Refrigeration.
ASHRAE Journal.
International Journal of Refrigeration.
Yan, International Journal of Refrigeration.
International Journal of Refrigeration.
Online since: January 2015
Authors: Jun Rui Pang, Gang Wang, Wei Sun, Long Su
The elastoplastic finite element analysis for the deep anti-sliding stability of gravity dam by the method of overloading
Junrui Pang 1,a , Wei Sun1,b, Gang Wang 1,c, Long Su 1,d
1College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
apangjunrui88@163.com,bsunwei891027@163.com,c277603148@qq.com,
d792130736@qq.com
Keyword: Gravity dam; Deep stability; Method of overloading; Finite element
Abstract: Combined with engineering requirements of the Qingyu reservoir, the ANSYS finite element software was used to establish an elastoplastic gravity dam calculation model which considered the mechanical properties of weak structural plane of rock in the dam foundation.
Tab. 1 Finite element calculation parameters Material E/MPa μ γ/kN·m-3 j/° C/MPa Concrete dam 2.55×104 0.17 24.0 Elasticity Surface sandstone 0.6×104 0.20 25.2 28.02 0.445 Dam Foundation Rock 1.5×104 0.20 25.4 32.83 0.715 Weak interlayer 0.4×104 0.27 23.5 19.55 0.158 Results Analysis of Overloading 4.1 Calculation Model Model parameters: the calculation range of dam foundation rock took 2.2 times the height of dam.
[J], Journal of Hydraulic Engineering, 2011,42(4):499-504
[3] CHANG Xiao-lin, WANG Hui, ZHOU Wei, ZHOU Chuang-bing, Mechanism of two sliding failure modes in gravity dam and method for safety evaluation, [J], Journal of Hydraulic Engineering, 2009,40(10):1189-1195
[4] SUN Jian-sheng, HOU Ai-min, The calculation method for stability against deep sliding with three sliding planes under the same reliability-surplus of gravity dam based on partial factor, [J], Journal of Hydraulic Engineering, 2013,44(3):367-372
Tab. 1 Finite element calculation parameters Material E/MPa μ γ/kN·m-3 j/° C/MPa Concrete dam 2.55×104 0.17 24.0 Elasticity Surface sandstone 0.6×104 0.20 25.2 28.02 0.445 Dam Foundation Rock 1.5×104 0.20 25.4 32.83 0.715 Weak interlayer 0.4×104 0.27 23.5 19.55 0.158 Results Analysis of Overloading 4.1 Calculation Model Model parameters: the calculation range of dam foundation rock took 2.2 times the height of dam.
[J], Journal of Hydraulic Engineering, 2011,42(4):499-504
[3] CHANG Xiao-lin, WANG Hui, ZHOU Wei, ZHOU Chuang-bing, Mechanism of two sliding failure modes in gravity dam and method for safety evaluation, [J], Journal of Hydraulic Engineering, 2009,40(10):1189-1195
[4] SUN Jian-sheng, HOU Ai-min, The calculation method for stability against deep sliding with three sliding planes under the same reliability-surplus of gravity dam based on partial factor, [J], Journal of Hydraulic Engineering, 2013,44(3):367-372
Online since: February 2013
Authors: Chun Tao Leng, Jian Jun Du, Qi Xin Cao, Xiao Xiao Zhu, Zhen Huang
Therefore, we need to do further selection of material for the mark and guidance line, to improve the vision recognition
It has also been partially supported by Ministry of Education of China(708035), Shanghai Education Commission (12ZZ014),Doctoral Fund of Ministry of Education of China (20090073110037) and the National Natural Science Foundation (61273331).
Vis, Survey of research in the design and control of automated guided vehicle systems, European Journal of Operational Research, Vol.170(3), 2006,pp. 677-709 [2] Min Ji, Jun Xia, Analysis of vehicle requirements in a general automated guided vehiclesystem based transportation system, Computers & Industrial Engineering, Vol.59, 2010, pp.544–551 [3]Jungmin Kim, Jungje Park, Sungshin Kim, Inertial Navigation System for Omni-directional AGV with MecanumWheel, Advances in Mechanical Engineering, Vol.2(1), 2012, pp.48-54 [4]Samani, A.
,Modeling and analysis of the dynamics of an omni-directional mobile manipulators system, Journal of Intelligent and Robotic Systems: Theory and Applications, Vol.52(1), 2008, pp.101-120 [6]ChuntaoLeng,Qixin Cao, Charles Lo, A Motion Control Method for Omni-directional Mobile Robots Based on Anisotropy, Industrial Robot: An International Journal, Vol.37(1), 2010, pp.23-35 [7] Hidaka, K., Adaptive control design of an omnidirectional automated guided vehicle in consideration of mass change, SICE, 2007, pp. 2578 – 2581 [8]ChuntaoLeng; Qixin Cao, Yanwen Huang, A motion planning method for omni-directional mobile robot based on the anisotropic characteristics, International Journal of Advanced Robotic Systems, Vol. 5(4), 2008, pp. 327-340 [9]Felipe, H., Miguel, T., A Comparison of Path Planning Algorithms for Omni-directional Robots in Dynamic Environments, Robotics Symposium, IEEE 3rd Latin American, 2006, pp.18-25
It has also been partially supported by Ministry of Education of China(708035), Shanghai Education Commission (12ZZ014),Doctoral Fund of Ministry of Education of China (20090073110037) and the National Natural Science Foundation (61273331).
Vis, Survey of research in the design and control of automated guided vehicle systems, European Journal of Operational Research, Vol.170(3), 2006,pp. 677-709 [2] Min Ji, Jun Xia, Analysis of vehicle requirements in a general automated guided vehiclesystem based transportation system, Computers & Industrial Engineering, Vol.59, 2010, pp.544–551 [3]Jungmin Kim, Jungje Park, Sungshin Kim, Inertial Navigation System for Omni-directional AGV with MecanumWheel, Advances in Mechanical Engineering, Vol.2(1), 2012, pp.48-54 [4]Samani, A.
,Modeling and analysis of the dynamics of an omni-directional mobile manipulators system, Journal of Intelligent and Robotic Systems: Theory and Applications, Vol.52(1), 2008, pp.101-120 [6]ChuntaoLeng,Qixin Cao, Charles Lo, A Motion Control Method for Omni-directional Mobile Robots Based on Anisotropy, Industrial Robot: An International Journal, Vol.37(1), 2010, pp.23-35 [7] Hidaka, K., Adaptive control design of an omnidirectional automated guided vehicle in consideration of mass change, SICE, 2007, pp. 2578 – 2581 [8]ChuntaoLeng; Qixin Cao, Yanwen Huang, A motion planning method for omni-directional mobile robot based on the anisotropic characteristics, International Journal of Advanced Robotic Systems, Vol. 5(4), 2008, pp. 327-340 [9]Felipe, H., Miguel, T., A Comparison of Path Planning Algorithms for Omni-directional Robots in Dynamic Environments, Robotics Symposium, IEEE 3rd Latin American, 2006, pp.18-25
Online since: November 2012
Authors: De Sheng Yin, Wei Xing Qing, Chun Sheng Li
School of Water Conservancy, Changsha University of Science and Technology, Changsha 410114, China
3.
Journal of Hydraulic Engineering,1996,(1):78-84.
Chinese Journal of Rock Mechanics and Engineering,2007,26(3):608-613.
Chinese Journal of Geotechnical Engineering, 2006, 28(9):1070-1075.
Journal of Wuhan Univ. of Hydr. and Elec.
Journal of Hydraulic Engineering,1996,(1):78-84.
Chinese Journal of Rock Mechanics and Engineering,2007,26(3):608-613.
Chinese Journal of Geotechnical Engineering, 2006, 28(9):1070-1075.
Journal of Wuhan Univ. of Hydr. and Elec.
Online since: December 2011
Authors: B. Kusz, M. Gazda, P. Jasinski, B. Bochentyn, K. Gdula-Kasica, T. Lendze, W. Lewandowska-Iwaniak, A. Mielewczyk-Gryn, S. Molin
Therefore, in both groups of SOFCs, alternative cathode materials are sought.
Perovskite anode materials The properties of an ideal SOFC anode material are very much similar to these required for the cathode material.
Properties of perovskite materials allow applying them as components of SOFCs.
Jacobson Materials for Solid Oxide Fuel Cells, Chem.
[30] W.Z.Zhu, S.C.Deevi, Materials Science and Engineering A362 (2003) 228–239
Perovskite anode materials The properties of an ideal SOFC anode material are very much similar to these required for the cathode material.
Properties of perovskite materials allow applying them as components of SOFCs.
Jacobson Materials for Solid Oxide Fuel Cells, Chem.
[30] W.Z.Zhu, S.C.Deevi, Materials Science and Engineering A362 (2003) 228–239
Online since: May 2015
Authors: Nan Yang Sheng Zhang, Shuang Bao Wang, Bing Zhu, Yan An Zen
Among various candidate materials, α-Fe2O3 whose bandgap is approximately 2.2 eV has been considered as a potential candidate due to its low cost, chemical stability, widespread availability, and high absorbance (about 40% of the visible solar spectra).
Fe2O3 photo-electrode is a solar energy conversion material [5].
The crystalline phases present in the materials calcined at various temperatures were identified by XRD using a Powder X-Ray Diffractometer (Rigaku, Japan) with Cu Kα radiation.
Between them we design a sample cell with quartz materials that had a little absorption in visible wavelength.
Photoelectrochemistry of in Aqueous Solutions, Journal of The Electrochemical Society. 134(1987)76-80
Fe2O3 photo-electrode is a solar energy conversion material [5].
The crystalline phases present in the materials calcined at various temperatures were identified by XRD using a Powder X-Ray Diffractometer (Rigaku, Japan) with Cu Kα radiation.
Between them we design a sample cell with quartz materials that had a little absorption in visible wavelength.
Photoelectrochemistry of in Aqueous Solutions, Journal of The Electrochemical Society. 134(1987)76-80
Online since: December 2013
Authors: Shui Wen Chang-Chien, Min Chao Wang, Yuan Chung Liao, Yueh Shih Lu, Tsung Yin Yang, Chuan Chi Chien
Materials and Methods
Materials
Soil: The Tapumei Series red sample collected from Ming-Tou, Na-Tou in central Taiwan was used.
Hue, “Amelioration subsoil acidity by surface application of calcium fulvates derived from common organic materials”, Biol.
García-González, “Potential use of gypsum and lime rich industrial by-products for induced reduction of Pb, Zn and Ni leachability in an acid soil”, Journal of Hazardous Materials, 175 (15), 762-769(2010).
Keeney, “Methods of Soil Analysis Part II - Chemical and Microbiological Properties”, Soil Science of America, Madison, Wisconsin, USA, 5:199-224(1982)
Fang, “Effects of Soil Moisture Regime on the Forms and Availability of Potassium in Soils”, Taiwan Journal of Agricultural Chemistry and Food Science, 42:321-328(2004).
Hue, “Amelioration subsoil acidity by surface application of calcium fulvates derived from common organic materials”, Biol.
García-González, “Potential use of gypsum and lime rich industrial by-products for induced reduction of Pb, Zn and Ni leachability in an acid soil”, Journal of Hazardous Materials, 175 (15), 762-769(2010).
Keeney, “Methods of Soil Analysis Part II - Chemical and Microbiological Properties”, Soil Science of America, Madison, Wisconsin, USA, 5:199-224(1982)
Fang, “Effects of Soil Moisture Regime on the Forms and Availability of Potassium in Soils”, Taiwan Journal of Agricultural Chemistry and Food Science, 42:321-328(2004).