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RISS 인기검색어
- 검색키워드
- 저자 : Shafiq Ur Rahman (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Characterizing Barium Titanate Piezoelectric Material Using the Finite Element Method
Butt, Zubair,Rahman, Shafiq Ur,Pasha, Riffat Asim,Mehmood, Shahid,Abbas, Saqlain,Elahi, Hassan The Korean Institute of Electrical and Electronic 2017 Transactions on Electrical and Electronic Material Vol.18 No.3
The aim of the current research was to develop and present an effective methodology for simulating and analyzing the electrical and structural properties of piezoelectric material. The finite element method has been used to make precise numerical models when dielectric, piezoelectric and mechanical properties are known. The static and dynamic responses of circular ring-shaped barium titanate piezoelectric material have been investigated using the commercially available finite element software ABAQUS/CAE. To gain insight into the crystal morphology and to evaluate the purity of the material, a microscopic study was conducted using a scanning electron microscope and energy dispersive x-ray analysis. It is found that the maximum electrical potential of 6.43 V is obtained at a resonance frequency of 35 Hz by increasing the vibrating load. The results were then compared with the experimentally predicted data and the results agreed with each other.
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Characterizing Barium Titanate Piezoelectric Material Using the Finite Element Method
Zubair Butt,Shafiq Ur Rahman,Riffat Asim Pasha,Shahid Mehmood,Saqlain Abbas,Hassan Elahi 한국전기전자재료학회 2017 Transactions on Electrical and Electronic Material Vol.18 No.3
The aim of the current research was to develop and present an effective methodology for simulating and analyzingthe electrical and structural properties of piezoelectric material. The finite element method has been used to makeprecise numerical models when dielectric, piezoelectric and mechanical properties are known. The static anddynamic responses of circular ring-shaped barium titanate piezoelectric material have been investigated using thecommercially available finite element software ABAQUS/CAE. To gain insight into the crystal morphology and toevaluate the purity of the material, a microscopic study was conducted using a scanning electron microscope andenergy dispersive x-ray analysis. It is found that the maximum electrical potential of 6.43 V is obtained at a resonancefrequency of 35 Hz by increasing the vibrating load. The results were then compared with the experimentally predicteddata and the results agreed with each other.
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Synthesis and Characterization of Mg-Matrix Based TiO2/Al2O3 Composite Materials
Mohammad Sohail,Sanaullah Khan,Shafiq ur Rahman,Bilal Ahmad,Adnan Adnan,Ihsan Ullah 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.4
Based on low density, Mg metal-based composites exhibit high specific mechanical properties and are actively used for weightcritical structural application. In the present study, Mg-matrix based TiO2/Al2O3 composite materials were synthesized byusing the powder metallurgy (Solid-phase) technique. Parameters such as the concentration of the components, temperature,and pressure were optimized before experiments. Different conditions such as temperature (30 °C) and pressure (760 mmof Hg) were also optimized. Pellets of the Mg-based composites and their pure constituent counterparts of various diameters(10–20 cm) were prepared under 50 tons of hydraulic pressure. Single-phase homogenous composites were obtainedby undertaking the pellets through sintering in an electric furnace at elevated temperature (600 °C) for 1 h. The preparedmaterials were tested for different properties using various physicochemical techniques such as Fourier transform infraredspectroscopy (FTIR), Scanning electronic microscopy (SEM), X-ray diffraction (XRD) and Surface area analyzer. FTIRresults confirmed composite formation. SEM revealed microstructures of all materials in the μm range. XRD proved thephase-distribution and crystallinity of the prepared materials. It was found that 2 and 3-component systems are homogenizedwhen prepared by the powder metallurgy technique. The surface area of all materials was confirmed using the BET adsorptionisotherm equation. The surface area of the prepared composites was found to be in the range from 40 to 70 m2/g. Suchproperties enable these materials for potential application in solar reflectance and as a catalyst in liquid phase hydrogenation.
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Aaqib Majeed,Ahmad Zeeshan,Tariq Mahmood,Shafiq Ur Rahman,Imran Khan 한국자기학회 2019 Journal of Magnetics Vol.24 No.1
The present article is planned theoretically to throw light on non-Newtonian Casson liquid flow and heat transport analysis over an exponentially stretching sheet with second-order velocity slip condition. The analysis of magneto-hydrodynamic (MHD) is an important interdisciplinary field. One of the most imperative applications related to engineering problems is plasma confinement, liquid-metal cooling of nuclear reactors, and electromagnetic casting. The flow here is considered to be electrically conducting. The modelled equations of mass, momentum and energy transport are reduced into the nonlinear ordinary differential equations by employing a similarity approach which are then solved numerically by employing finite difference collocation process (a three-stage Lobatto IIIa scheme). The inspiration of convergence flow parameters on dimensionless velocity, temperature have been discussed graphically. The obtained results confirm that an excellent agreement is achieved for the Newtonian case with those available in the literature. Consequences establish that skin friction rises in the presence of Casson fluid parameter and the Nusselt number show enhancement for second order slip parameter.
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