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Online since: August 2013
Authors: Wei Kai Xu, Wei Wang, Dong Wei Zhang
During the experiment, two measured earthquake acceleration records of a far-field Northridge wave and a near-field El-Centro wave were selected.
The acceleration peak of the Northridge waves and El-Centro wave adjust to 1.97 m·s-2, respectively.
Fig.3 Maximum acceleration of each layer under Northridge wave Fig.4.Maximum displacement of each layer under Northridge wave Fig.5.Maximum acceleration of each layer under El-Centro wave Fig.6.Maximum displacement of each layer under El-Centro wave It can be seen from Fig.5 and Fig.6, under the effect of El-Centro wave, every layer’s maximum acceleration and maximum displacement of each layer of the steel frame with SMA cable have also reduced, the maximum acceleration of top-level was reduced by 43.8%, and the maximum displacement of bottom layer was reduced by 82%.
Y., et al, Smart Mater.
(in chinese) [8] Han Yulin, Li Aiqun, Lin Pinghua et al.
The acceleration peak of the Northridge waves and El-Centro wave adjust to 1.97 m·s-2, respectively.
Fig.3 Maximum acceleration of each layer under Northridge wave Fig.4.Maximum displacement of each layer under Northridge wave Fig.5.Maximum acceleration of each layer under El-Centro wave Fig.6.Maximum displacement of each layer under El-Centro wave It can be seen from Fig.5 and Fig.6, under the effect of El-Centro wave, every layer’s maximum acceleration and maximum displacement of each layer of the steel frame with SMA cable have also reduced, the maximum acceleration of top-level was reduced by 43.8%, and the maximum displacement of bottom layer was reduced by 82%.
Y., et al, Smart Mater.
(in chinese) [8] Han Yulin, Li Aiqun, Lin Pinghua et al.
Online since: October 2023
Authors: Omar Mommadi, Carlos Alberto Duque, Laaziz Belamkadem, Reda Boussetta, Abdelaaziz El Moussaouy, Farid Falyouni, Soufiane Chouef, Mohammed Hbibi, Mohamed Chnafi
El Moussaouy1,3,g, C.A.
El Hadi, A.
[9] A.L.
El Hadi, M.
El-Miad.
El Hadi, A.
[9] A.L.
El Hadi, M.
El-Miad.
Online since: October 2018
Authors: Asmaa S. Hamouda, M.A. El-Sheikh, Ibrahim M. Ismail, Mohmoud A. Abdelzaher
ELMiiaa plant, El-Minia Governorate and limestone provided from Samalot formation limestone area, El-Minia Governorate.
[2] El-Roudi, A.
[8] Kong, Deyu, et al.
A., et al.
[25] Meng, Tao, et al.
[2] El-Roudi, A.
[8] Kong, Deyu, et al.
A., et al.
[25] Meng, Tao, et al.
Online since: September 2008
Authors: S. Bet, Aravinda Kar, N.R. Quick
Electroluminescence studies showed
an orange (677 nm) corresponding to Cr-Al and, red (698 nm) and white (380-900 nm) for Se-Al
and pure white for Cr-Se-Al.
The electroluminescence (EL) spectrum in Fig. 2 shows the DAP transition between the N-Cr impurity states corresponding to the acceptor energy level reported by Achtziger et al. [4].
Electroluminescence (EL).
Electroluminescence spectra for Cr-Al doped, Se-Al doped and Cr-Se-Al doped 4H-SiC.
Pieter Kik, and Forrest Ruhge, (Nanophotonics Device group at CREOL), for valuable suggestions and assistance with EL measurements.
The electroluminescence (EL) spectrum in Fig. 2 shows the DAP transition between the N-Cr impurity states corresponding to the acceptor energy level reported by Achtziger et al. [4].
Electroluminescence (EL).
Electroluminescence spectra for Cr-Al doped, Se-Al doped and Cr-Se-Al doped 4H-SiC.
Pieter Kik, and Forrest Ruhge, (Nanophotonics Device group at CREOL), for valuable suggestions and assistance with EL measurements.
Online since: March 2007
Authors: T. Izumi, Goroh Itoh
Table 1 Compositions of the specimens in mass %
Specimen Mg Si Fe Cu Al
Al-6Mg
Al-8Mg
6.00
8.10
0.002
0.004
0.19
0.004
0.02
0.002
Bal.
YS : yield strength, UTS : ultimate tensile strength, El : elongation, GS : grain size.
Specimen YS/MPa UTS/MPa El (%) GS/μm Al-6Mg 103 275 40 142 Al-8Mg 133 321 51 160 2.3 Experimental procedure Figure 2 is a schematic drawing of the apparatus for detecting the hydrogen emitted from the inside of the materials under the stress-corrosion environment.
(a)Al-6Mg, (b)Al-8Mg.
(a)Al-6Mg, (b)Al-8Mg.
YS : yield strength, UTS : ultimate tensile strength, El : elongation, GS : grain size.
Specimen YS/MPa UTS/MPa El (%) GS/μm Al-6Mg 103 275 40 142 Al-8Mg 133 321 51 160 2.3 Experimental procedure Figure 2 is a schematic drawing of the apparatus for detecting the hydrogen emitted from the inside of the materials under the stress-corrosion environment.
(a)Al-6Mg, (b)Al-8Mg.
(a)Al-6Mg, (b)Al-8Mg.
Online since: March 2018
Authors: G. Kawamura, Atsunori Matsuda, F. Fakhry, M.A. Amer, Talaat Meaz, Reda El-Shater
El-Shater 1,f
and F.
El-Shater, T.
El-Sayed, M.A.
El Shershaby, Rad.
Al-Lohedan.
El-Shater, T.
El-Sayed, M.A.
El Shershaby, Rad.
Al-Lohedan.
Online since: December 2013
Authors: Stefano Spigarelli, Mohamad El Mehtedi, Samer El Mohtadi
A new constitutive model describing the plastic flow of metals:
Application to the AA6082 aluminum alloy
Mohamad El Mehtedi1,a, Samer El Mohtadi2,b and Stefano Spigarelli3,c
1,2,3DIISM, Università Politecnica delle Marche, Ancona, Italy
aelmehtedi@univpm.it, bs.i.elmohtadi@univpm.it, cs.spigarelli@univpm.it
Keywords: Hot working, constitutive equations, aluminum alloys
Abstract.
Experimental procedure The alloy considered in the present study was the AA6082 (Al-0.96%Si-0.65%Mg-0.18%Fe, composition in wt.%).
In b) the experimental data and the curves calculated by Li et al [1] for the AA7050 by Eqns.1 and 2 are illustrated.
Only above a certain stress level, dislocations break away from solute atom atmospheres and can freely glide; in this case, deformation becomes climb-controlled, n=5 and Q is equivalent to the activation energy for self-diffusion in Al (143 kJ/mol) [7].
El Mehtedi, L.
Experimental procedure The alloy considered in the present study was the AA6082 (Al-0.96%Si-0.65%Mg-0.18%Fe, composition in wt.%).
In b) the experimental data and the curves calculated by Li et al [1] for the AA7050 by Eqns.1 and 2 are illustrated.
Only above a certain stress level, dislocations break away from solute atom atmospheres and can freely glide; in this case, deformation becomes climb-controlled, n=5 and Q is equivalent to the activation energy for self-diffusion in Al (143 kJ/mol) [7].
El Mehtedi, L.
Online since: May 2014
Authors: Hanadi G. Salem, El Sayed M.A. Rassoul, W.H. El-Garaihy
El-Garaihy1, a, El-Sayed M.A.
The presence of SiCp at the triple junctions and along the grain boundaries enhanced the rate of strain hardening of the Al-matrices and significantly refined the grain size.
Hv-values were measured along the disk cross section at indentation spacing's of 0.5 mm using a procedure described by Zhilyaev et al. [7].
El-Garaihy, and E.A.
Langdon," Ultrafine grains and the Hall–Petch relationship in an Al–Mg–Si alloy processed by HPT", Materials Science and Engineering, A 532 (2012), 139-145
The presence of SiCp at the triple junctions and along the grain boundaries enhanced the rate of strain hardening of the Al-matrices and significantly refined the grain size.
Hv-values were measured along the disk cross section at indentation spacing's of 0.5 mm using a procedure described by Zhilyaev et al. [7].
El-Garaihy, and E.A.
Langdon," Ultrafine grains and the Hall–Petch relationship in an Al–Mg–Si alloy processed by HPT", Materials Science and Engineering, A 532 (2012), 139-145
Online since: April 2013
Authors: Khairul Habib
Saha et al. [4] have measured adsorption characteristics of R507A on activated carbon.
The isosteric heat of adsorption for AC-R507A and can be expressed by El-Sharkawy et al. [1], (4) Adsorption and desorption energy balance.
El-Sharkawy, A.
El-Sharkawy, S.
El-Sharkawy, K.
The isosteric heat of adsorption for AC-R507A and can be expressed by El-Sharkawy et al. [1], (4) Adsorption and desorption energy balance.
El-Sharkawy, A.
El-Sharkawy, S.
El-Sharkawy, K.
Online since: September 2019
Authors: Hamid Chakir, Abderrazak En-Naji, Fatima Sabah, Achraf Wahid, Mohamed El Ghorba
However, Makadir et al [4] used to normalize damage to characterize an Acrylonitrile-butadiene-styrene (ABS) polymer plate under uniaxial loading.
Main feature the influence of the notch on the behavior of Polyvinyl chloride (PVC) pipes, Arid et al [5] used normalized damage formulation on notched plat specimens.
[3] El Ghorba,M.
[9] Wahid, Ashraf, et al.
[12] M.El Ghorba,” Evolution of the damage and the crack propagation under cyclic loading the A 36 steel and aluminium 6351-T6’’Master memory, Montreal University, Canada,198.
Main feature the influence of the notch on the behavior of Polyvinyl chloride (PVC) pipes, Arid et al [5] used normalized damage formulation on notched plat specimens.
[3] El Ghorba,M.
[9] Wahid, Ashraf, et al.
[12] M.El Ghorba,” Evolution of the damage and the crack propagation under cyclic loading the A 36 steel and aluminium 6351-T6’’Master memory, Montreal University, Canada,198.