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Online since: November 2013
Authors: Miroslav Rimár, Ivan Čorný, Štefan Kuna
For conversion of classical electric motor rotary movement to linear movement, a range of various mechanisms is implemented. [1,2,3]
Linear drives are divided into categories according to their operation principles:
1. unidirectional,
2. asynchronous,
3. synchronous:
a) with primary part without ferromagnetic materials,
b) with ferromagnetic materials.
Jovankovič, New Trends in Linear Actuators Control (Nové trendy v riadení lineárnych pohonov), A&T Journal 2 (2006) 67-70
Mičko, Statistical Process Control Method Based on Weight Percent of Al-Si Alloy for Melting and Holding Process in Die Casting, in: Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 62 (2012) 188-190
Zajac, Turning Bearing Rings and Determination of Selected Cutting Materials Durability, Advanced Science Letters 19 (2013) 2486-2489
Zajac, Study Influence of Plastic Deformation a New Extra Low Carbon Stainless Steels XCr17Ni7MoTiN under the Surface Finish When Drilling, Advanced Materials Research 538-541 (2012) 1312-1315
Jovankovič, New Trends in Linear Actuators Control (Nové trendy v riadení lineárnych pohonov), A&T Journal 2 (2006) 67-70
Mičko, Statistical Process Control Method Based on Weight Percent of Al-Si Alloy for Melting and Holding Process in Die Casting, in: Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 62 (2012) 188-190
Zajac, Turning Bearing Rings and Determination of Selected Cutting Materials Durability, Advanced Science Letters 19 (2013) 2486-2489
Zajac, Study Influence of Plastic Deformation a New Extra Low Carbon Stainless Steels XCr17Ni7MoTiN under the Surface Finish When Drilling, Advanced Materials Research 538-541 (2012) 1312-1315
Online since: November 2017
Authors: Ahmed Zaki Farahat, Sherif Ali Abd El Rahman, Taha Mattar, Mohamed K. Elfawkhry, Ahmed Y. Shash
Materials and Experimental Procedures
A 100Kg of medium carbon steel scrap was melted in the open-air induction furnace which was used to melt the low carbon 1020 for the nitride inoculation.
[6] Yoozbashi MN, Yazdani S, Wang TS, "Design of a new nanostructured, high-Si bainitic steel with lower cost production," Materials & Design, vol. 32, no. 6, pp. 3248-3253, 2011
[9] Singh SB, Bhadeshia HKDH, "Estimation of bainite plate-thickness in low-alloy steels," Materials Science and Engineering: A, vol. 245, no. 1, pp. 72-79, 1998
Zhang, "Carbide-free bainite in medium carbon steel," Materials and Design, vol. 64, pp. 237-245, 2014
Elmahallawi, Taha Mattar, “Improvement of Mechanical Properties and Structure Modifications of Low Carbon Steel by Inoculations with Nano-Size Silicon Nitride”, Journal of Nano Research, Vol. 47, pp 24-32
[6] Yoozbashi MN, Yazdani S, Wang TS, "Design of a new nanostructured, high-Si bainitic steel with lower cost production," Materials & Design, vol. 32, no. 6, pp. 3248-3253, 2011
[9] Singh SB, Bhadeshia HKDH, "Estimation of bainite plate-thickness in low-alloy steels," Materials Science and Engineering: A, vol. 245, no. 1, pp. 72-79, 1998
Zhang, "Carbide-free bainite in medium carbon steel," Materials and Design, vol. 64, pp. 237-245, 2014
Elmahallawi, Taha Mattar, “Improvement of Mechanical Properties and Structure Modifications of Low Carbon Steel by Inoculations with Nano-Size Silicon Nitride”, Journal of Nano Research, Vol. 47, pp 24-32
Online since: December 2010
Authors: Yan Li Guo, Xing You Yao
The finite element program ANSYS7.1 considering the material non-linear and geometry large deformation is used to simulate joints.
The design bending stress of the beam-to-column joint and connection shall satisfy the following: (1) Where σ- bending stress of welds of column face and beam of reduced zone of RBS joints considering combination of seismic action for connection and joint respectively, Mb-design bending moments of welds of column face and beam of reduced zone of RBS joints considering combination of seismic action for connection and joint respectively, Wnx-net section modulus of weld of column face and beam of reduced zone of RBS joints respectively, f - design value of material strength of steel, γRE -seismic adjusting factor for load-bearing capacity,0.9 and 0.75 for connecting weld of column face and beam of reduced zone of RBS joints respectively according to reference [1,10,11]. 2) Bending bearing capacity of beam-to-column joint and connection under rarely earthquake.
Conclusion The non-linear finite element models were established to analysis concrete-filled steel square tubular column and reduced steel beam with circular and long-circular hole in web, considering geometric large deformation and material nonlinear.
Journal of Building Structures (in Chinese), Vol. 25(3) (2005), p.9-16
Journal of Xi’an University of Science & Technology (in Chinese).
The design bending stress of the beam-to-column joint and connection shall satisfy the following: (1) Where σ- bending stress of welds of column face and beam of reduced zone of RBS joints considering combination of seismic action for connection and joint respectively, Mb-design bending moments of welds of column face and beam of reduced zone of RBS joints considering combination of seismic action for connection and joint respectively, Wnx-net section modulus of weld of column face and beam of reduced zone of RBS joints respectively, f - design value of material strength of steel, γRE -seismic adjusting factor for load-bearing capacity,0.9 and 0.75 for connecting weld of column face and beam of reduced zone of RBS joints respectively according to reference [1,10,11]. 2) Bending bearing capacity of beam-to-column joint and connection under rarely earthquake.
Conclusion The non-linear finite element models were established to analysis concrete-filled steel square tubular column and reduced steel beam with circular and long-circular hole in web, considering geometric large deformation and material nonlinear.
Journal of Building Structures (in Chinese), Vol. 25(3) (2005), p.9-16
Journal of Xi’an University of Science & Technology (in Chinese).
Online since: August 2012
Authors: Tao Yu, Rong Song Hu, Li Lan Liu
The monitoring web terminal can clearly know the status of materials in the warehouse, production line, and workshop, including what items is full, supplement required, urgent to supplement, or empty and master the whole production status of the enterprise, including material flow, production flow, and information flow.
Acknowledgements This work was financially supported by the NSCF (No. 50805089) and Shanghai Science and Technology Committee (No. 11510500400).
Jiang: International Journal of Advanced Manufacturing Technology, Vol. 36 (2008), pp. 752-764
Jiang: Journal of Intelligent Manufacturing, Vol. 19(2008), pp. 701-713
Acknowledgements This work was financially supported by the NSCF (No. 50805089) and Shanghai Science and Technology Committee (No. 11510500400).
Jiang: International Journal of Advanced Manufacturing Technology, Vol. 36 (2008), pp. 752-764
Jiang: Journal of Intelligent Manufacturing, Vol. 19(2008), pp. 701-713
Online since: January 2012
Authors: Jin Hua Yan, Hui Xia Xu, Yan Li
Experiment
Materials.
The bending resistance of paperboard is basic to most of the uses to which this material is put.
[5] Asakura, Kazumichi; Iwamoto, Masao; Isogai, Akira, Effects of fatty acid components present in alkylketene dimer (AKD) wax on emulsion stability and paper sizing performance, Journal of Wood Chemistry and Technology (2005), 25(1-2), 13-26
[6] Yamamoto, H., Kitaoka, T., Tanaka, H., Surface characteristics and sizing response of paper sheets sized by anionic emulsion of fatty acids, Journal of Pulp and Paper Science (2004), 30(5), 136-140
The bending resistance of paperboard is basic to most of the uses to which this material is put.
[5] Asakura, Kazumichi; Iwamoto, Masao; Isogai, Akira, Effects of fatty acid components present in alkylketene dimer (AKD) wax on emulsion stability and paper sizing performance, Journal of Wood Chemistry and Technology (2005), 25(1-2), 13-26
[6] Yamamoto, H., Kitaoka, T., Tanaka, H., Surface characteristics and sizing response of paper sheets sized by anionic emulsion of fatty acids, Journal of Pulp and Paper Science (2004), 30(5), 136-140
Online since: December 2012
Authors: Heng Hua Wang, Xi Yu Wang, Yang Qing Liu, Xiao Yu
Except the high strength bolts, the material was Q345-B steel whose yield stress (fy) and elasticity modulus (E) were 345MPa and 2.06x105MPa respectively.
All the materials were simplified to have idealized elastic-plastic stress-strain relationships.
[2] Henghua Wang: Building Science.
[3] Henghua Wang: Journal of Building Structures.
[5] Korol R.M., Ghobarah A., Mourad S.: Journal of Structural Engineering.
All the materials were simplified to have idealized elastic-plastic stress-strain relationships.
[2] Henghua Wang: Building Science.
[3] Henghua Wang: Journal of Building Structures.
[5] Korol R.M., Ghobarah A., Mourad S.: Journal of Structural Engineering.
Online since: December 2014
Authors: Song Bai Lin, Yun Long Li, Bin Huang Liu
Applied Technology Center of Fujian Provincial High Education for Practical Chemical Material, 362000, Fujian,China
3.College of Material Science and Engeneering, HuaQiao University, 361021, Fujian,China.
In those studies[9-14], the metal catalysts were usually prepared on stable supporting materials such as Al2O3 and SiO2, where the metal catalysts were assumed to be highly dispersed as the fine particles on the surface of the supporting materials.
The peaks of C, N, O and S were observed, indicating that the materials were formed from AMPS and HEMA.
Acknowledgments This work was financially supported by Natural Science Foundation of Fujian Province (No. 2012J01423) , Pride Youth Program of Fujian Provincial High Education (No.
Kitaoka: Chemical Engineering Journal 168 (2011), p. 420
In those studies[9-14], the metal catalysts were usually prepared on stable supporting materials such as Al2O3 and SiO2, where the metal catalysts were assumed to be highly dispersed as the fine particles on the surface of the supporting materials.
The peaks of C, N, O and S were observed, indicating that the materials were formed from AMPS and HEMA.
Acknowledgments This work was financially supported by Natural Science Foundation of Fujian Province (No. 2012J01423) , Pride Youth Program of Fujian Provincial High Education (No.
Kitaoka: Chemical Engineering Journal 168 (2011), p. 420
Online since: August 2009
Authors: X.J. Feng, L.F. Liang, Yi Jun Zhou
Based on a large number of experiments,
this paper puts forwards an online stress test method to the large-size plate of material (40mm and
above) forming.
First, using strain flower, it measures the line strainε1,ε2, ε3 of the test points in three directions 0 °, 60 °, 120 °, and calculates the principal strain ε of the test points: min max = 2 13 2 32 2 21 321 )()()( 3 2 ) ( 3 1 The maximum and minimum positive stress of this point can be obtained under the following calculation: 2232321 1 321 min max ) 3 () 3 ( 1 1 )1(3 E Of which: E-material elastic modulus -The material Poisson ratio Then the strain field matrix of the whole can get by the arrangement of test results collection.
Gaydon, An analysis of the plastic bending of a thin strip in its plane, Journal of Mechanics and Physics of Solids,1, 1953, pp. 103-112
Hu, Generalized variational principle of three kinds of variables in general mechanics, Science in China(Series A), 2001,44 (6) : 770-776 [7]Hill R., Mathematical theory of plasticity, Oxford: University Press,1950 [8]Yu Mao-hong and He Li-nan, A new model and theory on yield and failure of materials under the complex stress state, Mechanical Behaviour of Materials-6, Pergaman Press, 1991, Vol.3, 841-846
Liang, A Short-Cut Method of Derivation of Elasto-Plastic Constitutive Relation , Strength Theory by Maohong Yu, Science Press, Beijing and New York, 1998
First, using strain flower, it measures the line strainε1,ε2, ε3 of the test points in three directions 0 °, 60 °, 120 °, and calculates the principal strain ε of the test points: min max = 2 13 2 32 2 21 321 )()()( 3 2 ) ( 3 1 The maximum and minimum positive stress of this point can be obtained under the following calculation: 2232321 1 321 min max ) 3 () 3 ( 1 1 )1(3 E Of which: E-material elastic modulus -The material Poisson ratio Then the strain field matrix of the whole can get by the arrangement of test results collection.
Gaydon, An analysis of the plastic bending of a thin strip in its plane, Journal of Mechanics and Physics of Solids,1, 1953, pp. 103-112
Hu, Generalized variational principle of three kinds of variables in general mechanics, Science in China(Series A), 2001,44 (6) : 770-776 [7]Hill R., Mathematical theory of plasticity, Oxford: University Press,1950 [8]Yu Mao-hong and He Li-nan, A new model and theory on yield and failure of materials under the complex stress state, Mechanical Behaviour of Materials-6, Pergaman Press, 1991, Vol.3, 841-846
Liang, A Short-Cut Method of Derivation of Elasto-Plastic Constitutive Relation , Strength Theory by Maohong Yu, Science Press, Beijing and New York, 1998
Online since: November 2012
Authors: Zhao Hua Du, Jie Wang
TEST
Test Raw Material
Some main raw materials are shown as below: normal portland cement of P.O 42.5 produced by Mengdian Group in Henan province, fly ash of gradeⅡfrom Shouyangshan plants in Luoyang city, TH-2 Naphthalene Series High Range Water Reducing Agents , crushed stone with 2.82 fineness modulus from Lushan in Pingdingshan city, tap water.
The material mix proportion is shown in table 2.
China Building Materials Science & Technology, 3, 28-30
PH.D thesis, Hua zhong University of Science and Technology, Wuhan, 26-27
Journal of Tongji University ,35:11, 1445-1449
The material mix proportion is shown in table 2.
China Building Materials Science & Technology, 3, 28-30
PH.D thesis, Hua zhong University of Science and Technology, Wuhan, 26-27
Journal of Tongji University ,35:11, 1445-1449
Online since: May 2011
Authors: Jian Min Du, En Li Lu, Ying Shu Yuan, Guo Li, Ou Geng
If the water supply is not enough during initial curing period, the hydration of binder materials could not proceed adequately.
Experimental Materials.
Progress in Energy and Combustion Science, 36(2010):327-363
Construction and Building Materials, 23(2009), 1980-1985
[11] G.Li, E.L.Lu, P.Wang etc.: Advanced Materials Research, Vol.168-170(2011):532-536.
Experimental Materials.
Progress in Energy and Combustion Science, 36(2010):327-363
Construction and Building Materials, 23(2009), 1980-1985
[11] G.Li, E.L.Lu, P.Wang etc.: Advanced Materials Research, Vol.168-170(2011):532-536.