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Online since: January 2021
Authors: K. Abdellaoui
Abd El-Ghany, A.
Abd El-Maboud, M.A.
Yakuphanoglu, The effects of Al doping on the optical constants of ZnO thin films prepared by spray pyrolysis method, J.
El-Diasty, Factors affecting optical dispersion in borate glass systems, J.
Online since: September 2017
Authors: Noor Syuhadah Subki, Mohd Shafiq Shamsuddin, Nik Raihan Nik Yusoff, Muhammad Azwadi Sulaiman, Yusoff Mahani
El Zayat and E.
Smith, “Removal of Heavy Metals by Using Activated Carbon Produced from Cotton Stalks Mohamed El Zayat and Edward Smith Environmental Engineering Program, the American University in Cairo,” pp. 1–9, 2006
El-deen, “Characterization of activated carbon prepared by phosphoric acid activation of olive stones,” Arab.
Gómez-Serrano, “Activated carbon surface chemistry: Changes upon impregnation with Al(III), Fe(III) and Zn(II)-metal oxide catalyst precursors from NO3− aqueous solutions,” Arab.
Online since: July 2012
Authors: Rozana Mohd Dahan, Saiful Bahri Mohd Yasin, Zakaria Razak, Mohd Helmi Omar
Srisit at el reported that balancing of the gate and runner system for a family mold can be achieved by balancing the melt filling the cavities by using CAE tools.
Park at el suggested a variable-runner system to balance the cavity filling in a family mold as well as examining the effect of shear heating with the aid of CAE analysis [4].
Ivan at el automated and optimized a family mold cavity and runner layout design (FMCRLD).
Rohinton et al implemented a numerical optimization technique for runner system balancing of the family mold.
Online since: August 2007
Authors: Jae Hyouk Choi, Kenichi Ohi
More than a quarter of century has passed after a pseudo-dynamic on-line test technique was utilized to simulate inelastic structural responses to earthquakes (Takanashi et al. 1987).
Comparison with Pseudo-dynamic tests Pseudo-dynamic tests on an identical frame Pseudo-dynamic tests were performed on identical frames under two deterministic ground motions: One is scaled NS component of El Centro 1940, and the other is an acceleration impulse.
The natural period is set to around 0.5 seconds, and the yield base shear coefficient is around 0.6, which is relatively strong level compared with actual buildings, then the El Centro excitation was magnified to 10 m/sec 2 and 12.5 m/sec 2 in PGA in order to develop moderate yielding in the specimen.
An acceleration impulse induces a common initial velocity at each floor mass, and such an initial velocity was taken 0.71 m/sec, which was close to the elastic velocity response of the specimen frame to the El Centro excitation with 10 m/sec 2 in PGA.
Online since: October 2018
Authors: P.A. Lykov, R.M. Baitimerov, L.V. Radionova
Data of tensile test results (mean values of yield tensile strength (YTS), ultimate tensile strength (UTS) and elongation at break (El.)) are summarized in Table 3.
UTS is ultimate tensile strength, El. is elongation at break Heat treatment As-fabricated Stress-relieved at 650°C Annealed at 900°C Wrought mill-annealed TiAl6V4 [7] UTS, MPa 1240±60 1220±60 1178±47 840 El., % 1.5±0.3 1.4±0.2 1.0±0.2 10 Usually SLM fabricated Ti-6Al-4V shown a brittle behavior at room temperature [28] in comparison with wrought TiAl6V4 at mill-annealed condition.
Larosa, A.L.
Online since: September 2014
Authors: Yu Xiong, Jun Cao, Li Sha Liu
Atasu el.at.[1] pointed out that remanufacturing can become an effective marketing strategy, which allows the manufacturer to defend its market share via price discrimination.
Balakrishnan el.at. [2] stated that the number of inventory and manufacturers would affect the manufacturer's sales and customer services, and the services behavior.
Benjaafar el.at.[3] examined the value of competition as a mechanism for the buyer to elicit service quality from the suppliers.
Cao et al. stated that the discount factor is very sensitive to the rebuilding technologies transferred and the remanufacturing investment. [9].
Online since: July 2011
Authors: Eva Kalabisová, Jan Racek, K Vaclavikova
The XPS spectra were obtained using a monochromatic Al Kα (1486.6 eV) X-ray source operating at 300 W.
Although all of these loss peaks are broad and difficult to fix, the ∆EL shifts are generally dramatic and readily suggest the suspected changes in bonding character.
The characteristic EL for most adventitious carbon seamed at 22.0 ± 1.0 eV, C-C and C-H parts.
Interjection of C=O groups into hydrocarbon polymers was found to increase the EL value, suggesting an increasing in conjugation for carbon – oxygen previously localized system.
Online since: August 2024
Authors: Sepehr Ghafari, Fereidoon Moghadas Nejad
For instance, Kim and El Hossein [5] were among the first to assess fracture properties using the classical concept of fracture toughness.
Marasteanu et al [6] later employed the SE(B) test protocol to measure toughness values in AC mixtures at medium to low temperatures, which are based on linear-elastic principles involving a singularity zone ahead of the crack tip or minor-scale yielding [7].
Abd El-Rahman: Int.
El-Hossein: J.
Online since: March 2013
Authors: Łukasz Kaczmarek, Stanisława Jonas, Karol Kyzioł
Chemical composition of Al-Cu alloy (weight %) Element Cu Mg Mn Fe Si Zn Ti Cr Al Wt. % 4.61 1.29 0.72 0.50 0.45 0.23 0.16 0.09 Balance The polished Al-Cu substrates were chemically cleaned with isopropyl alcohol in ultrasonic bath for 10 minutes before being loaded into the chamber.
Chemical composition of Al-Cu alloy after various surfaces modification (weight %) Content [wt. %] Type of surfaces modification Element SiCNH deposition nitriding and SiCNH deposition Si 2.68 5.24 C 4.50 8.26 N 3.47 10.30 Orther (Al, Mg, Cu) balance balance Dependence of the hardness (H) and indentation modulus (elastic modulus, E) on contact depth for Al-Cu alloys after surface modification with the use of various plasma conditions is presented in Fig. 3.
Summary Surface of Al-Cu alloys (2024 series) has been successfully modified via MW CVD method.
Paosawatyanyong, Nitridation of Al–6%Cu alloy by RF plasma process, Surf. & Coat.
Kaufman and E.L.
Online since: September 2019
Authors: Koichi Nakamura, Omayma A. El Kady, Mohsen A. Hassan, Peter Nyanor, Atef S. Hamada
Zhang et al [11], predicted the elasto-plastic deformation and fracture propagation in SiCp/Al composite.
The assumption of perfect bonding between Al particles and rGO sheets as well as modelling of rGO as circular sheets instead of coating on Al particles are some limitations to this model.
Fig. 4a compares thermal conductivity estimated by FE-RVE simulation, MFH method and experimental data from Zhang et al [13] for pure Al, 0.1 wt.%, 0.2 wt.% and 0.3 wt.% rGO.
The cracks formation is mainly due to thermal expansion mismatch between rGO (0.9 x 10-6/K) and Al (23.6 x 10-6/K) which causes tensile stress in Al and compressive stress in rGO as shown in the probability distribution in Fig. 5a, indicating that Al is sufficiently yielded in the cooling process [6].
Zhang et al., “3D Microstructure-based finite element modeling of deformation and fracture of SiCp/Al composites,” Composites Science and Technology, vol. 123, pp. 1–9, Feb. 2016
Showing 2161 to 2170 of 9913 items