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Online since: September 2012
Authors: Kui Huang
Inquires include the basic information like flood control organization team and flood control warehouse materials , etc(7) Flood control plan information query.(8) Flood control file material management and inquiry(9) Real-time situation of reporting and inquiring.
The query can include flood control organization, flood control team and basic message like warehouse materials. (4) Real-time practicing and dangerous situation information report, the statistics inquiry.
Journal of Zhengzhou unversity (engineering science). 2003, 24(2): 59-66
The query can include flood control organization, flood control team and basic message like warehouse materials. (4) Real-time practicing and dangerous situation information report, the statistics inquiry.
Journal of Zhengzhou unversity (engineering science). 2003, 24(2): 59-66
Online since: October 2013
Authors: Wei Xu, Chang Geng Shuai, Zhi Qiang Lv
Fig.2 The reaction force of isolator to the shell.
where and are Poisson ratio and elastic module of shell material respectively, is dimensionless shell length, is the longitudinal wave speed in the material defined by
(3)
where is the material density, is dimensionless shell thickness defined by
(4)
Considering that radial displacements are dominant in the cylindrical shell’s motion, the two-order differential terms relating to and in Eq.2a and Eq.2b are ignored for simplicity.
Substituting Eq.5, Eq.6, Eq.13, Eq.14 and 18 into Eq.2 yields (19) where is the damping ratio of shell material, is the isolator deflection given by Eq.14.
The Poisson ratio of shell material is , elastic module is , and density is kg/m3.
Journal of Sound and Vibration. 226(1) (1999) 101-123
Amsterdam, Elsevier Science Publishers, 1989
Substituting Eq.5, Eq.6, Eq.13, Eq.14 and 18 into Eq.2 yields (19) where is the damping ratio of shell material, is the isolator deflection given by Eq.14.
The Poisson ratio of shell material is , elastic module is , and density is kg/m3.
Journal of Sound and Vibration. 226(1) (1999) 101-123
Amsterdam, Elsevier Science Publishers, 1989
Online since: August 2014
Authors: Bo Wang, Dong Xu Wu, Guo Li, Zheng Qiao, Lei Lv
By modifying the microstructures of surface, people can transform materials’ physical, chemical and optic properties[1].
Workpiece material is 2A12 aluminium alloy.
Acknowledgments This research is supported by National Science and Technology Major Project of High-end CNC Machine Tools and Basic Manufacturing Equipment of China (Project nos.: 2011ZX04004-021).
Journal of Materials Processing Technology, 2009(209) 4802-4808.
Workpiece material is 2A12 aluminium alloy.
Acknowledgments This research is supported by National Science and Technology Major Project of High-end CNC Machine Tools and Basic Manufacturing Equipment of China (Project nos.: 2011ZX04004-021).
Journal of Materials Processing Technology, 2009(209) 4802-4808.
Online since: January 2012
Authors: Tao Huang, Yi Liu
In the case of DDA with high order displacement functions, considering the deformation and contact of blocks, one random shapes block is formed by some small line segment on the material boundary.
The left boundary, right boundary and bottom boundary are constrained The 8g body force is applied on the rigid block of material 3, and the boundary block of material 2 is rigid without body force.
For parameter of ground of material 1: the elastic modulus is 2Mpa, Poison ratio is 0.2.
The work has been supported by National Natural Science Foundation of China (Contacts Number: 50909105).
Influence of Seepage on the Stability of Rock Slope-Coupling of Seepage and Deformation By DDA Method[J], Chinese Journal of Rock Mechanical and Engineering, 2003, 22(8): 1269-1275.
The left boundary, right boundary and bottom boundary are constrained The 8g body force is applied on the rigid block of material 3, and the boundary block of material 2 is rigid without body force.
For parameter of ground of material 1: the elastic modulus is 2Mpa, Poison ratio is 0.2.
The work has been supported by National Natural Science Foundation of China (Contacts Number: 50909105).
Influence of Seepage on the Stability of Rock Slope-Coupling of Seepage and Deformation By DDA Method[J], Chinese Journal of Rock Mechanical and Engineering, 2003, 22(8): 1269-1275.
Online since: August 2013
Authors: Jiang Cen Ke, Lu Gan
In the Tenth Five-Year Period, the coal grew 80.0% in Yangtze River, metallic ore 139.2%, ore construction material 88.9%, cement 183.5%, nonmetallic ore 73.8% and so on.
Wuhan Shanghai iron ore:516 Huangshi Chizhou Nantong Coal:161 Coal:65 Tongling Nonmetallic ore:155 Ore construction material:391 Wuhu Ore construction material:434 Anqin Ore construction material:203 Figure1 Typical ship rout cargo flow of this leg in 2010 Figure 1 shows the typical ship rout cargo flow of this leg in 2010.The ship types are in table 1: Table1 Ship types Method choice Type of ships Cargo capacity B.H.P 1 4000powerboat 4000 880 2 5000powerboat 5000 1324 3 6000 powerboat 5350~6300 1324 4 7000 powerboat 7000 1600 5 (1942kw+9*1500t)push boat team 135000 1942 6 (1942kw+6*3000t)push boat team 18000 1942 7 (1942kw+9*2000t)push boat team 18000 1942 8 (1942kw+16*1000t)push boat team 16000 1942 Find out the corresponding factors that affect the level of evaluation objects through the systematic analysis on evaluation objects.
Then, sort them on the basis of referring to related material and experts’ opinions.
China Railway Science.2006.03
Journal of Liaodong University. 2006.02
Wuhan Shanghai iron ore:516 Huangshi Chizhou Nantong Coal:161 Coal:65 Tongling Nonmetallic ore:155 Ore construction material:391 Wuhu Ore construction material:434 Anqin Ore construction material:203 Figure1 Typical ship rout cargo flow of this leg in 2010 Figure 1 shows the typical ship rout cargo flow of this leg in 2010.The ship types are in table 1: Table1 Ship types Method choice Type of ships Cargo capacity B.H.P 1 4000powerboat 4000 880 2 5000powerboat 5000 1324 3 6000 powerboat 5350~6300 1324 4 7000 powerboat 7000 1600 5 (1942kw+9*1500t)push boat team 135000 1942 6 (1942kw+6*3000t)push boat team 18000 1942 7 (1942kw+9*2000t)push boat team 18000 1942 8 (1942kw+16*1000t)push boat team 16000 1942 Find out the corresponding factors that affect the level of evaluation objects through the systematic analysis on evaluation objects.
Then, sort them on the basis of referring to related material and experts’ opinions.
China Railway Science.2006.03
Journal of Liaodong University. 2006.02
Online since: November 2013
Authors: Mikhail D. Starostenkov, Alexander Yashin, Nikita Sinica
Nowadays, there is a large variety of the unique properties of nano-objects which can be used in the design and development of new materials.
The kinetics of disorder in the two-dimensional model of the alloy, Russian Physics Journal. 1997.
Investigation of the processes of atomic reconstruction in the nanofiber Ni3Al alloy subjected to uniaxial tensile strain in the <110>, Fundamental’nye problemy sovremennogo materalovedenia (Basic Problems of Material Science (BPMS)). 2009. - Vol. 6, № 1.
The study of structural transformations in the alloy Ni3Al under the influence of uniaxial tensile deformation, Deformation and fracture of materials. 2009. - № 6. - PP. 28-31.
The kinetics of disorder in the two-dimensional model of the alloy, Russian Physics Journal. 1997.
Investigation of the processes of atomic reconstruction in the nanofiber Ni3Al alloy subjected to uniaxial tensile strain in the <110>, Fundamental’nye problemy sovremennogo materalovedenia (Basic Problems of Material Science (BPMS)). 2009. - Vol. 6, № 1.
The study of structural transformations in the alloy Ni3Al under the influence of uniaxial tensile deformation, Deformation and fracture of materials. 2009. - № 6. - PP. 28-31.
Online since: October 2013
Authors: Fang Hong Sun, Bin Shen, Xin Chang Wang, Jian Guo Zhang, Tao Zhang, Lei Cheng
The last step is to define the material properties and boundary conditions.
The material properties are defined as functions of temperature, as briefly listed in Table 1[8].
Table 1 Materials properties Component Material Density [kg/m3] Thermal conductivity [W/(m·K)] Cp [J/(kg·K)] Recant gas Hydrogen Incompressible- ideal-gas 0.1672[RT] 1.09[2400°C] 14283[RT] 17794[2400 °C] Tools WC-Co[RT] 14600 35 130 Filaments Tantalum[2200 °C] 15500 63 185 Holder Graphite[RT] 2090 129 710 Worktable Copper 8979[RT] 388[RT] 347[1000 °C] 381[RT] 520.9[1000 °C] RT— Room temperature.
Acknowledgements This research is supported by the National Natural Science Foundation of China (No. 51275305, No.51005154).
Zuo: Journal of Synthetic Crystals .
The material properties are defined as functions of temperature, as briefly listed in Table 1[8].
Table 1 Materials properties Component Material Density [kg/m3] Thermal conductivity [W/(m·K)] Cp [J/(kg·K)] Recant gas Hydrogen Incompressible- ideal-gas 0.1672[RT] 1.09[2400°C] 14283[RT] 17794[2400 °C] Tools WC-Co[RT] 14600 35 130 Filaments Tantalum[2200 °C] 15500 63 185 Holder Graphite[RT] 2090 129 710 Worktable Copper 8979[RT] 388[RT] 347[1000 °C] 381[RT] 520.9[1000 °C] RT— Room temperature.
Acknowledgements This research is supported by the National Natural Science Foundation of China (No. 51275305, No.51005154).
Zuo: Journal of Synthetic Crystals .
Online since: August 2016
Authors: Guo Hui Quan, Xu Yong Zhao
Analysis on Phases and Grain Evolution of TC4 Ti-alloy in Hot Forming in Time and Space Based on Deform-3D
Guohui Quan 1, a *, Xuyong Zhao2,b
1Department of Materials Science and Engineering, Zhengzhou Technical College,
Zhengzhou (450121), China.
2Henan University of Animal Husbandry and Economy, Zhengzhou (450011), China.
The relationship between dynamic recrystallization volume fraction() and true strain(ε)is described by the famous JMAK equation[5]: (1) Where: ε - true strain, -0.6339 as Avarami material constants,-1.0994 as Avarami index,-strain when dynamic recrystallization is 50%.
The flow stress is given by the material database.
Deform-3D finite element model specific parameters are shown in Tab.1 and Tab.2: Tab.1 Finite element model parameters finite element model parameters numerical value ambient temperature (℃) 20 contact heat transfer coefficient between blank and die for die and die 1 contact heat transfer coefficient between billet and die in forging process 11 the friction coefficients between the blank and the moulds 0.3(shearing friction) heat transfer coefficient between billet and environment coefficient of heat transfer between the environment and the material in the blank space 0.02 0.005 heat transfer coefficient between mold and environment 0.02 Tab.2 Process parameters setting process parameters value blank temperature (℃) 950~990 upper die temperature (℃) 350 lower mold temperature (℃) 350 original grain size (μm) 50 average grain size(μm) 50 initial α phase volume fraction 0.5 initial β phase volume fraction 0.5 compression speed (mm/s) 4~20(the first fire) 2~10(the second fire)
High temperature deformation behavior of TC4 titanium alloy and its flows stress model [J].The Chinese Journal of Nonferrous Metals, 2008, (08):1395-1401.
The relationship between dynamic recrystallization volume fraction() and true strain(ε)is described by the famous JMAK equation[5]: (1) Where: ε - true strain, -0.6339 as Avarami material constants,-1.0994 as Avarami index,-strain when dynamic recrystallization is 50%.
The flow stress is given by the material database.
Deform-3D finite element model specific parameters are shown in Tab.1 and Tab.2: Tab.1 Finite element model parameters finite element model parameters numerical value ambient temperature (℃) 20 contact heat transfer coefficient between blank and die for die and die 1 contact heat transfer coefficient between billet and die in forging process 11 the friction coefficients between the blank and the moulds 0.3(shearing friction) heat transfer coefficient between billet and environment coefficient of heat transfer between the environment and the material in the blank space 0.02 0.005 heat transfer coefficient between mold and environment 0.02 Tab.2 Process parameters setting process parameters value blank temperature (℃) 950~990 upper die temperature (℃) 350 lower mold temperature (℃) 350 original grain size (μm) 50 average grain size(μm) 50 initial α phase volume fraction 0.5 initial β phase volume fraction 0.5 compression speed (mm/s) 4~20(the first fire) 2~10(the second fire)
High temperature deformation behavior of TC4 titanium alloy and its flows stress model [J].The Chinese Journal of Nonferrous Metals, 2008, (08):1395-1401.
Online since: January 2016
Authors: Ruslimie Che Ali, Asrul Mustafa
Introduction
Nowadays, due to environmental pollution concerns and increasing of public awareness on environmental issue, bio-fillers is gradually replacing with an alternative renewable or 'eco-friendly material'.
The characteristic of new material that can be used to replace existing fillers must be environmentally friendly, inexpensive, light in weight and renewable [1].
In the context, microcrystalline cellulose (MCC) fulfil most requirements as filler due to its availability and abundance source, inexpensive and ‘green’ or naturally occurring material [6].
All materials were used as received.
Prasarpran, Effect of epoxidized natural rubber (enr) on film and adhesive properties of Polyvinyl alcohol (PVA), International Journal of Science Research. 3 (1) (2014) 134-137
The characteristic of new material that can be used to replace existing fillers must be environmentally friendly, inexpensive, light in weight and renewable [1].
In the context, microcrystalline cellulose (MCC) fulfil most requirements as filler due to its availability and abundance source, inexpensive and ‘green’ or naturally occurring material [6].
All materials were used as received.
Prasarpran, Effect of epoxidized natural rubber (enr) on film and adhesive properties of Polyvinyl alcohol (PVA), International Journal of Science Research. 3 (1) (2014) 134-137
Online since: May 2012
Authors: Cao Xi, Yun Hong Hao
is yield function of material. and are continuous convex functions of .
E is elastic modulus of material.
The yield strength of material is 0.315× 10.
(There is no yield strength of model material in paper-6) IV.
The variational inequality equation in Mechanics and physics, Science Press,1987.
E is elastic modulus of material.
The yield strength of material is 0.315× 10.
(There is no yield strength of model material in paper-6) IV.
The variational inequality equation in Mechanics and physics, Science Press,1987.