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Online since: October 2013
Authors: Jia Ping Liu, Jian Zhong Liu, Qian Qian Zhang
The additon of 20% slag reduces the yield stress and plastic viscosity.The action of SL4 with the highest specific surface area is most significan, however the reduction of SL1 with lowest specific surface area on rheological properties is smallest.With the increasing of water-binder ratio, the yield stress and plastic viscosity of the mortar decrease, and the difference of the rheological parameters between the mortars with different slags becomes small.
Fig. 4 Effect of slag on water film thickness Fig. 4 shows the effect of slag with different specific surface areas on the water film thickness of mortar at water-binder ratio of 0.25, 0.28 and 0.30 by referring the method put forward by Kwan [11-12].The addition of slag increases the water film thickness, and slag with higher specific surface areas contributes larger water film thickness (negative data is because of the presence of air voids).
For the data presented in each graph, regression analysis has been carried out to derive the best-fit curve, whose equation and R2 value are listed in the figure.
Online since: January 2013
Authors: Chung Gil Kang, Yong Phil Jeon, Min Geun Jung
Table 1 Material properties of silicone rubber Table 2 Material properties of Al 1050 Parameter Unit Data Density g/cc 0.70 – 3.70 Hardness, Shore A 5.00 – 95.0 Tensile Strength, Yield MPa 5.20 – 8.00 Modulus of Elasticity GPa 4.48e-5 – 0.448 Poissons Ratio 0.50 Parameter Unit Data Hardness, Brinell 43 Tensile Strength MPa 160 Poissons Ratio 0.33 Sheer Strength MPa 83 Elongation at Break % 7 Electrical Resistance ohm-cm 2.9 e -6 Thermal Conductivity W/m-K 227 Fig. 2 shows the shape of the upper die for fabricating the bipolar plate and the manufactured bipolar plate sample.
As shown in Fig. 2(a), the multiple parallel serpentine type of the micro channel was chosen because this type is more advantageous to the contact area between the bipolar plate and the electrode and the reduction of the pressure drop than any other type.
Online since: April 2014
Authors: Xin Xu, Yi Wang Chen
Multifractal was presented and was used in analyzing turbulence data firstly by Benoit B.Mandelbrot[6].
Nonstationary Spatial Texture Estimation Applied to Adaptive Speckle Reduction of SAR Data.
Online since: June 2013
Authors: Xiao Yang, Yu Wen Zhai
Then the measurement precision could be decreased along with the reduction of signal frequency.
Architecture of the frequency measurement module Frequency measurement module design based on VHDL The VHDL program of the constant-precision frequency measurement module is as follow as: LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY PLJ IS PORT (BCLK,TCLK,CLR,CL,SEL : IN STD_LOGIC; - JS : OUT STD_LOGIC; DATA : OUT STD_LOGIC_VECTOR(7 DOWNTO 0)); END PLJ; ARCHITECTURE BEHAVE OF PLJ IS SIGNAL FB,FT: STD_LOGIC_VECTOR(31 DOWNTO 0); SIGNAL ENA: STD_LOGIC; BEGIN JS <= ENA ; DATA <= FB(7 DOWNTO 0) WHEN SEL="000" ELSE FB(15 DOWNTO 8) WHEN SEL="001" ELSE FB(23 DOWNTO 16) WHEN SEL="010" ELSE FB(31 DOWNTO 24) WHEN SEL="011" ELSE FT( 7 DOWNTO 0) WHEN SEL="100" ELSE FT(15 DOWNTO
Online since: September 2013
Authors: Pavol Zubko, Miloš Matvija, Martin Fujda
In the present study, the natural ageing kinetics obtained for this alloy using the microhardness measurement is in a good agreement with the logarithmic dependence of the hardness (HV) on the ageing time (t) given by equation [14]: HV = Aln(t) + B, (1) where A and B are constants estimated by fitting experimental data.
Increase of the alloy hardness (HV) with increasing ageing time (t) was more accurately defined by the tangential equation [10]: HV = A arc tan (tB – C) + D, (2) where A, B, C and D were constants determined using experimental data-fitting procedure.
The retardation of natural ageing kinetics after solution annealing at a higher temperature was probably result of solid solution grain coarsening, as well as the reduction of the initiation places for the precipitation of strengthening phases.
Online since: October 2021
Authors: Xiao Zhou Li, Shen Wang, Bin Dai, Le Tong, Jin Kai Xu, Mao Xun Wang
The cutting force data is processed by DynoWare software.
Due to the characteristics of fiber anisotropy, when surface grinding ceramic matrix composites, there are two fiber directions of 0o and 90o on the grinding surface, and the surface roughness Sa of the two fiber angle directions should be measured as experimental data.
The greater the vibration amplitude, the greater the reduction in surface roughness.
Online since: April 2013
Authors: P.S. Pa
An effective evaluation on the process both features and sets up the complete processing parameters data, which is expected to apply propagation as a super finishing following turning machining process in the future.
The amount of reduction in the workpiece's surface after electrochemical finishing is 20µm, which is designed in the process for the dimensional control of parts.
The measuring data is chosen from at least two different locations.
Online since: March 2012
Authors: Jin Hu, Bi Xin Guo, Xiao Wei Du
When welding, the joint must have good mechanical properties, as well as the combination property of compound steel, reduction of anti-corrosion, crack resistance and electroconductibility of the joint must be prevented.
According to existing data, thickness of the hardening zone of intermediate layer can reach to 2.5 mm, this hardening zone is very sensitive to coldcrack, and is easy to produce crack
According to the existing data, when sheet material is thin, I-shape groove is used; When sheet material is thick, v-shape, u-shape, x-shape or v-u combined shape groove is used.
Online since: September 2013
Authors: Dan Feng Du
As can be known, the diesel particulate filter (DPF) is considered a very effective solution to attain the PM emission standards, since they have proved to meet serious diesel engine pollution reduction limits.
Meanwhile, as can be seen from experiment results, the adsorption number density increases with pressure, which agrees with the simulation data basically.
(2) The simulation results were validated by the engine test bench and the results showed that the experimental adsorption number density of nanoparticles increases with pressure, which agrees with the simulation data basically.
Online since: August 2008
Authors: Gobwute Rujijanagul, C. Puchmark
Although, variation in the data was found, the trend can be well fitted by the phenomenological kinetic grain growth equation [10] expressed as (3) where G defines as the average grain size at the time t, k' the constant, m the kinetic grain growth exponent, E the apparent activation energy, R the gas constant, and T is the temperature in Kevin.
There was an increase in maximum dielectric constant from 14890 for the 1100 o C sintered sample to 21150 for the 1200 o C sintered sample, followed by reductions for further sintering temperatures.
Joint Committee on Powder Diffraction Standards (JCPDS) PDF-4, Internation Centre for Diffraction Data (ICDD), 2000
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