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Online since: July 2017
Authors: Anastasiya Lyagova
As a rule, the estimation of the residual life of a vertical steel tank does not account for mechanical properties of the materials and specific operation conditions.
The application of such norms to estimation of residual life of vertical steel tanks with surface non-through cracks can lead to unreasonably overestimated volume of repair works, which in turn increases both the maintenance duration and material expenses.
This testifies the reasonability of a differentiated approach to the determination of ultimate defect dimensions with due consideration of the tank operation conditions, stress-strain state of the structure, mechanical properties of the material, etc.
The wall material is steel A516-55.
Gerasimenko, Surface flaws behavior under tension and biaxial tension-compression, International Journal of Fatigue http://www.sciencedirect.com/science/article/pii/S0142112316300895 [5] A.
The application of such norms to estimation of residual life of vertical steel tanks with surface non-through cracks can lead to unreasonably overestimated volume of repair works, which in turn increases both the maintenance duration and material expenses.
This testifies the reasonability of a differentiated approach to the determination of ultimate defect dimensions with due consideration of the tank operation conditions, stress-strain state of the structure, mechanical properties of the material, etc.
The wall material is steel A516-55.
Gerasimenko, Surface flaws behavior under tension and biaxial tension-compression, International Journal of Fatigue http://www.sciencedirect.com/science/article/pii/S0142112316300895 [5] A.
Online since: December 2006
Authors: Hong Rui Ao, Hong Yuan Jiang, A.M. Ulanov
Introduction
Vibration isolators made of Metal Rubber (MR) material have found numerous applications in the
supporting structure of electronic equipments or rotors in spacecraft's engine since they are capable
of attenuating heavy shock and absorbing broad band vibration.
The following conclusions can be made: The dry friction damping was the dominant mechanism for energy dissipation of MR material, which was generated by relative slip between adjacent wires.
Ulanov: Modelling and Simulation in Materials Science and Engineering Vol. 13(2005), p.609 [2] D.E.
Chegadaev: Construction Design of Machine Elements Made of Elasto-Porous MR material.
Ferri: Journal of Sound and Vibration Vol. 140(1990), p.287
The following conclusions can be made: The dry friction damping was the dominant mechanism for energy dissipation of MR material, which was generated by relative slip between adjacent wires.
Ulanov: Modelling and Simulation in Materials Science and Engineering Vol. 13(2005), p.609 [2] D.E.
Chegadaev: Construction Design of Machine Elements Made of Elasto-Porous MR material.
Ferri: Journal of Sound and Vibration Vol. 140(1990), p.287
Online since: August 2014
Authors: Roszilah Hamid, M.A. Zubir
Experimental Program
Materials and Method.
Acknowledgement The authors would like to thank the Ministry of Science and Innovation Malaysia for the financial support provided through grant 06-01-02-SF0755.
American Society for Testing Materials, Journal of Testing and Evaluation, Vol. 2 (1974), No. 5, p.1-7
Xu: Performance of glass powder as a pozzolanic material in concrete: a field trial on concrete slabs.
Acknowledgement The authors would like to thank the Ministry of Science and Innovation Malaysia for the financial support provided through grant 06-01-02-SF0755.
American Society for Testing Materials, Journal of Testing and Evaluation, Vol. 2 (1974), No. 5, p.1-7
Xu: Performance of glass powder as a pozzolanic material in concrete: a field trial on concrete slabs.
Online since: December 2014
Authors: Yu Yun Fu, Ke Ma
This paper adopts polydimethylsiloxane (PDMS) as raw materials, oligomeric methyl triethoxysilane as crosslinking agent, replace the traditional crosslinking agent-ethyl orthosilicate, produced dense pervaporation membrane and study the effect of treatment of wastewater containing phenol.
1 Instruments and Drugs
1.1 Instruments
90-3 Thermostatic bidirectional magnetic stirrer, ZK-82B Vacuum drying oven, AW120 electronic balance (SHIMADZU), TV-1810 UV visible spectrophotometer, LHS-150SC constant temperature and humidity box, Fourier transform infrared-Raman spectroscopy, JY-82 contact angle measurement instrument, Pervaporation device, substrate, homemade scraper.
1.2 Drugs
Poly dimethyl siloxane (PDMS), methyl triethoxysilane (Sinopharm chemical reagent company), dibutyltin dilaurate, toluene, phenol.
2 Experiment
2.1 Preparation of pervaporation membrane
The PDMS prepolymer, toluene as solvent, methyl triethoxy silane cross-linking agent, dibutyltin dilaurate as catalyst according
Wastewater containing phenol with different concentrations prepared from phenol and distilled water, liquid material is heater by the heater through the feed pump, enters the membrane chamber, the downstream component is collected by a liquid nitrogen cold trap to condensation, residual liquid cyclic back to the liquid tank, pumping vacuum control the pressure of the downstream, the effective area of the membrane is 1.6×10-2 m2. 2.2 FT-IR Characterization Fig.1 The FR-IR spectrum of PDMS membrane The Infrared Spectroscopy (IR) of the PDMS pervaporation membranes is shown in Fig.1.
The experiment investigates the effects of solution in different proportions of the crosslinking agent in certain conditions on the membrane separation performance. 2.4 Effect of operating conditions on the treatment effect In addition to the membrane material and crosslinking agent, the separation effect is also related to operating conditions, such as: the feed temperature, concentration and velocity, separation pressure, parameter optimization of membrane can be confirm by the further study of the effects of operating conditions on the membrane performances. 3 Results and Discussion The water contact angle of PDMS pervaporation membrane is 98.2°, the contact angle of phenol is 34.6°, contact angle of phenol is obviously smaller than the contact angle of water infiltration, Prove that the membrane has a strong hydrophobicity, high selective for phenol.
When the temperature of the feed was 60°C, the flow rate was 0.6L/min, the downstream side pressure was 6KPa, with the increase of the concentration of phenol in raw material, the permeation flux and separation factor increased.
Journal of Environmental Sciences, 2003, 15 (6): 821-826.
Wastewater containing phenol with different concentrations prepared from phenol and distilled water, liquid material is heater by the heater through the feed pump, enters the membrane chamber, the downstream component is collected by a liquid nitrogen cold trap to condensation, residual liquid cyclic back to the liquid tank, pumping vacuum control the pressure of the downstream, the effective area of the membrane is 1.6×10-2 m2. 2.2 FT-IR Characterization Fig.1 The FR-IR spectrum of PDMS membrane The Infrared Spectroscopy (IR) of the PDMS pervaporation membranes is shown in Fig.1.
The experiment investigates the effects of solution in different proportions of the crosslinking agent in certain conditions on the membrane separation performance. 2.4 Effect of operating conditions on the treatment effect In addition to the membrane material and crosslinking agent, the separation effect is also related to operating conditions, such as: the feed temperature, concentration and velocity, separation pressure, parameter optimization of membrane can be confirm by the further study of the effects of operating conditions on the membrane performances. 3 Results and Discussion The water contact angle of PDMS pervaporation membrane is 98.2°, the contact angle of phenol is 34.6°, contact angle of phenol is obviously smaller than the contact angle of water infiltration, Prove that the membrane has a strong hydrophobicity, high selective for phenol.
When the temperature of the feed was 60°C, the flow rate was 0.6L/min, the downstream side pressure was 6KPa, with the increase of the concentration of phenol in raw material, the permeation flux and separation factor increased.
Journal of Environmental Sciences, 2003, 15 (6): 821-826.
Online since: October 2010
Authors: Mohd Ambar Yarmo, Mohd Zikri Razali, Huda Abdullah
AMBAR Yarmo
2
1
Department of Electric, Electronic & System Eng, Faculty of Engineering and Built Environment,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, MALAYSIA
2
School of Chemical Science and Food Technology, Universiti Kebangsaan Malaysia,43600 UKM
Bangi, MALAYSIA
a
huda@vlsi.eng.ukm.my
Keywords: Nanoporous TiO2, Electrode, Dye sensitized solar cell, Efficiency
Abstract.
The main component of a DSSC is a semiconducting material with a wide band gap.
Titanium dioxide (TiO2) is one of the materials that had been widely used [3].
Materials and Method This TiO2 paste was prepared by mixing the 0.8g of TiO2 nanopowder and 0.5 M TiCl4 water solution.
[6] Dongshe Zhang, Hengyao Hu, Laifeng Li, and Donglu Shi, Low-Temperature Preparation of Amorphous-Shell/Nanocrystalline-Core Nanostructured TiO2 Electrodes for Flexible DyeSensitized Solar Cells, Journal of Nanomaterials, Volume 2008, Article ID 271631, 4 pages
The main component of a DSSC is a semiconducting material with a wide band gap.
Titanium dioxide (TiO2) is one of the materials that had been widely used [3].
Materials and Method This TiO2 paste was prepared by mixing the 0.8g of TiO2 nanopowder and 0.5 M TiCl4 water solution.
[6] Dongshe Zhang, Hengyao Hu, Laifeng Li, and Donglu Shi, Low-Temperature Preparation of Amorphous-Shell/Nanocrystalline-Core Nanostructured TiO2 Electrodes for Flexible DyeSensitized Solar Cells, Journal of Nanomaterials, Volume 2008, Article ID 271631, 4 pages
Online since: October 2011
Authors: Mamtimin Gheni, Mutellip Ahmat, Asiye Shavkat, Kaysar Ismayil
Table.1 shows the material parameters of it.
The material parameters of mechanical seal ring Sealing Parts Material Type Young’s Modulus (Mpa) Poisson’s Ratio Static Ring Graphite 1.96×104 0.280 Dynamic Ring Silicon Carbide 4.50×105 0.218 Rotating Seat Steel 2.05×105 0.300 The isolation analysis is a more intuitive modeling method for structural static analysis of sealing rings, so the static and dynamic ring were separated and analyzed by the isolation analysis method.
This is due to material of dynamic ring and contact face area.
This is due to the material of dynamic ring and contact face area.
Acknowledgements This paper is supported by the University Scientific Research Projects Fund of Xinjiang Autonomous Region(XJEDU2010I15),the Opening Fund of the National Key Lab for Modern Manufacture of Xi’an Jiao Tong Unversity (201011),the national natural science fund project(50805125).
The material parameters of mechanical seal ring Sealing Parts Material Type Young’s Modulus (Mpa) Poisson’s Ratio Static Ring Graphite 1.96×104 0.280 Dynamic Ring Silicon Carbide 4.50×105 0.218 Rotating Seat Steel 2.05×105 0.300 The isolation analysis is a more intuitive modeling method for structural static analysis of sealing rings, so the static and dynamic ring were separated and analyzed by the isolation analysis method.
This is due to material of dynamic ring and contact face area.
This is due to the material of dynamic ring and contact face area.
Acknowledgements This paper is supported by the University Scientific Research Projects Fund of Xinjiang Autonomous Region(XJEDU2010I15),the Opening Fund of the National Key Lab for Modern Manufacture of Xi’an Jiao Tong Unversity (201011),the national natural science fund project(50805125).
Online since: July 2011
Authors: Chang Qing Chen, Zhi Geng Fan, Wen Jun Hu
Introduction
Cellular polymers like silicone rubber foams and polyurethane foams have excellent properties, such as high temperature resistance, corrosion proofing, oxidation resistance and large deformations, and are usually used as cushions, padding, and packaging materials.
Moreover, two parameter Mooney-Rivlin strain energy potential model is introduced to characterize the hyperelasticity of the solid from which the foams are made, (1) where W is strain energy function, C1 and C2 are material parameters, and I 1 and I 2 are the first and second invariant of the right Cauchy-Green strain tensor.
Acknowledgments This work is financially supported by the National Basic Research Program of China (973 Program, 2010CB832700) and the key project of Foundation for Development of Science and Technology by China Academy Engineering Physics (CAEP) (Grant No. 2008A0302011).
Van der Burg et al.: Mechanics of Materials, Vol. 30(1998), p.125 [3] M.W.D.
Lu: Journal of Mechanical Strength, Vol. 29(2007), p.627 (in Chinese)
Moreover, two parameter Mooney-Rivlin strain energy potential model is introduced to characterize the hyperelasticity of the solid from which the foams are made, (1) where W is strain energy function, C1 and C2 are material parameters, and I 1 and I 2 are the first and second invariant of the right Cauchy-Green strain tensor.
Acknowledgments This work is financially supported by the National Basic Research Program of China (973 Program, 2010CB832700) and the key project of Foundation for Development of Science and Technology by China Academy Engineering Physics (CAEP) (Grant No. 2008A0302011).
Van der Burg et al.: Mechanics of Materials, Vol. 30(1998), p.125 [3] M.W.D.
Lu: Journal of Mechanical Strength, Vol. 29(2007), p.627 (in Chinese)
Online since: July 2013
Authors: Tao Li, Bo Zhang, Shuai Niu, Wen Bin Chen, Wen Cai Li, Fa Tao Chen, Li Sheng Liang, Xin Hong
Experimental Investigation on Reduction Kinetics of Stainless Steel-making slag in Iron bath Smelting Reduction
ZHANG Bo1, NIU Shuai1, CHEN Wenbin1, LI Wencai1,
CHEN Fatao1, LI Tao1, LIANG lisheng2, HONG Xin1a
1Shanghai Key Laboratory of Modern Metallurgy & Materials Processing,
Shanghai University, Shanghai China
2Baosteel co., Ltd, Shanghai China
aRoom 417 Building Rixin Shanghai University NO.149 Yanchang Road Shanghai China,
E-mail: xhong@mail.shu.edu.cn
Key Words: stainless steel-making slag, smelting reduction, reduction rate, iron bath
Abstract: Reduction kinetics of stainless steel slag in iron bath smelting reduction was studied at the temperature of 1500℃ ~ 1650℃.
Fig.1 Experimental apparatus Stainless steel-making slag generated from electric arc furnace was used as experimental material.
Tab.1 Composition analysis of stainless steel-making slag material Cr% Fe% Al% Ca% Si% Mg% content 3.58 3.52 3.77 54.67 18.60 11.90 As shown in fig.2, the main elements in the slag were Ca, Si and Mg.
Acknowledgements The authors acknowledge the financial support of the National Natural Science Foundation of China (Grant No. 50634040) and Chinese National Key Technology R&D Program (Grant No. 2006BAE03A12). 6.
Journal of Chongqing Institute of Technology[J].
Fig.1 Experimental apparatus Stainless steel-making slag generated from electric arc furnace was used as experimental material.
Tab.1 Composition analysis of stainless steel-making slag material Cr% Fe% Al% Ca% Si% Mg% content 3.58 3.52 3.77 54.67 18.60 11.90 As shown in fig.2, the main elements in the slag were Ca, Si and Mg.
Acknowledgements The authors acknowledge the financial support of the National Natural Science Foundation of China (Grant No. 50634040) and Chinese National Key Technology R&D Program (Grant No. 2006BAE03A12). 6.
Journal of Chongqing Institute of Technology[J].
Monotonic Behaviors of Steel Frames with Sandwich Composite Panel Infills: Theoretical and Numerical
Online since: August 2012
Authors: Miao Liu, He Tao Hou, Yan Fei Sun, C.X. Qiu
Holmes [5],suggested replacing the panel with an equivalent diagonal strut of the same material, having a width w equal to 1/3 of the infill diagonal length.
The basic analytical study was carried out on a single-storey single-bay infilled frame, of which the materials are assumed linear elastic.
For the considered infilled frame, a small load of 10kN was applied to ensure the materials behave elastically but no plastic strain was allowed.
Acknowledgements The present work was sponsored by the Natural Science Foundation of Shandong Province (No.
Journal Struct.
The basic analytical study was carried out on a single-storey single-bay infilled frame, of which the materials are assumed linear elastic.
For the considered infilled frame, a small load of 10kN was applied to ensure the materials behave elastically but no plastic strain was allowed.
Acknowledgements The present work was sponsored by the Natural Science Foundation of Shandong Province (No.
Journal Struct.
Online since: June 2011
Authors: Olivier Bouaziz, Yves Bréchet, Alexis Deschamps, Frédéric Danoix, Frédéric de Geuser, Patricia Donnadieu, Malika Perrier
But the related mechanical properties are often combined to a brittle behavior, limiting the possible applications of the material.
Fig. 1: Hardness evolution with time of Fe-Si-Ti alloy by Henon et al. [3] Since, the optimization of mechanical properties is essential for materials in transportation applications and regarding the encouraging results obtained in literature (fig. 1), mechanical tests were performed on Fe-Si-Ti. fig. 2 shows the evolution of the Vickers hardness for samples annealed at 3 different precipitation temperatures: 450°C, 500°C and 550°C.
Guiu, in Low temperature deformation mechanisms in an Fe-Si-Ti alloy, Journal of Materials Science Vol.10, pgs. 1161-1168 (1975) [3] J-P.
Fig. 1: Hardness evolution with time of Fe-Si-Ti alloy by Henon et al. [3] Since, the optimization of mechanical properties is essential for materials in transportation applications and regarding the encouraging results obtained in literature (fig. 1), mechanical tests were performed on Fe-Si-Ti. fig. 2 shows the evolution of the Vickers hardness for samples annealed at 3 different precipitation temperatures: 450°C, 500°C and 550°C.
Guiu, in Low temperature deformation mechanisms in an Fe-Si-Ti alloy, Journal of Materials Science Vol.10, pgs. 1161-1168 (1975) [3] J-P.