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- 저자 : Mohammed Balubaid (검색결과 4 건)
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Mohammed Balubaid,Abdelouahed Tounsi,B. Dakhel,S.R. Mahmoud 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.24 No.6
In this research paper, the free vibrational behavior of the simply supported FG nano-plate is studied using the nonlocal two variables integral refined plate theory. The present model takes into account the small scale effect. The effective’s properties of the plate change according to the power law variation (P-FGM). The equations of motion of the system are determined and resolved via Hamilton’s principle and Navier procedure, respectively. The validity and efficiency of the current model are confirmed by comparing the results with those given in the literature. At the last section, several numerical results are presented to show the various parameters influencing the vibrational behavior such as the small-scale effect, geometry ratio, material index and aspect ratio.
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Ahmed Ramady,B. Dakhel,Mohammed Balubaid,S.R. Mahmoud 사단법인 한국계산역학회 2020 Computers and Concrete, An International Journal Vol.25 No.5
In this work, the analytical solution for the stresses in piezo-thermo-elastic homogeneous, transversely isotropic material under the effect of the rotation has investigated. The thermoelasticity theory has used to study the problem. The material subjected to boundary conditions. Finally, the numerical solution has carried out piezo - thermo-elastic material under the effect of rotation, to illustrate the analytical development. The corresponding simulated results of various physical quantities such as the displacements and the stresses, the temperature and the electrical displacement have presented graphically.
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Fabrication of Curcumin-loaded Gliadin Electrospun Nanofibrous Structures and Bioactive Properties
Perihan Kubra Akman,Fatih Bozkurt,Mohammed Balubaid,Mustafa Tahsin Yilmaz 한국섬유공학회 2019 Fibers and polymers Vol.20 No.6
In this work, the feasibility and potential of food-grade gliadin nanofiber as a delivery vehicle for curcumin wereinvestigated. By optimizing the electrospinning parameters, homogeneous and fine gliadin nanofibers containing differentamounts of curcumin were fabricated. It was observed that gliadin micro-nanoparticles were gradually transformed to gliadinnanofibers and thicker nanofibers were obtained with the increment of the gliadin concentration. The electrospun nanofiberswere characterized in terms of morphological, molecular, thermal and crystallographic properties. Nanofibers were nearlyuniform with smooth surface characteristics and their average diameter ranged between 258 to 375 nm. Encapsulationefficiency of gliadin nanofibers increased with the increment of curcumin loading, which was also confirmed by X-raydiffraction patterns revealing that the most part of curcumin could be encapsulated in gliadin nanofibers. In vitro assessmentsof nanofibers indicated that the curcumin-loaded gliadin nanofibers showed a controlled release of curcumin and protected itsfree radical scavenging ability. In addition, these nanofibers showed important levels of antibacterial activities againstStaphylococcus aureus and Escherichia coli. Furthermore, the encapsulation of curcumin within nanofibers conspicuouslyenhanced the antioxidant and antibacterial activities of curcumin within these nanofibers. The results suggested that thegliadin nanofiber could be an available carrier for the delivery of curcumin and has the potential for applications in the foodindustry and other bioactive delivery systems.
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Erukala Kalyan Kumar,Subrata Kumar Panda,S. R. Mahmoud,Mohammed Balubaid 한국섬유공학회 2023 Fibers and polymers Vol.24 No.9
The finite element (FE) solutions of the smart (SMA: shape memory alloy fibre bonded) composite with and without crack are computed in this research. The structural model is derived mathematically considering the shear deformation effect, and the proposed functions maintain the necessary continuity of stresses. The numerical solutions are obtained via the computer code considering the blocking/recovery stress phenomenon (via marching technique) due to the inclusion of SMA fibre. The necessary correctness and the numerical results sensitivities are verified as priori. The solutions are showing an improvement of structural stiffness (decrease in deflections around 22–27% and 14–22% for the prestrain values 3–5% and 10–30% volume fraction of shape memory alloy fibre, SMA) due to the activation of SMA (under elevated temperature) fibres. Finally, the influences of all different structural design (aspect ratio, thickness ratio, boundary conditions, load intensities and crack dimension), material (SMA relevant data), environment and damage effects on the static flexural deflections are examined through a series of examples.
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