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RISS 인기검색어
- 검색키워드
- 저자 : Muhammad Basha (검색결과 4 건)
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Nonlocal strain gradient theory for buckling and bending of FG-GRNC laminated sandwich plates
Muhammad Basha,Ahmed Amine Daikh,Ammar Melaibari,Ahmed Wagih,Ramzi Othman,Khalid H. Almitani,Mostafa A. Hamed,Alaa Abdelrahman,Mohamed A Eltaher 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.43 No.5
The bending and buckling behaviours of FG-GRNC laminated sandwich plates are investigated by using novel fivevariables quasi 3D higher order shear deformation plate theory by considering the modified continuum nonlocal strain gradient theory. To calculate the effective Young’s modulus of the GRNC sandwich plate along the thickness direction, and Poisson’s ratio and mass density, the modified Halpin-Tsai model and the rule of the mixture are employed. Based on a new field of displacement, governing equilibrium equations of the GRNC sandwich plate are solved using a developed approach of Galerkin method. A detailed parametric analysis is carried out to highlight the influences of length scale and material scale parameters, GPLs distribution pattern, the weight fraction of GPLs, geometry and size of GPLs, the geometry of the sandwich plate and the total number of layers on the stresses, deformation and critical buckling loads. Some details are studied exclusively for the first time, such as stresses and the nonlocality effect.
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Static and modal analysis of bio-inspired laminated composite shells using numerical simulation
Faisal Baakeel,Mohamed A. Eltaher,Muhammad Adnan Basha,Ammar Melibari,Alaa A. Abdelrhman Techno-Press 2023 Advances in aircraft and spacecraft science Vol.10 No.4
In the first part of this study, a numerical simulation model was developed using the mechanical APDL software to validate the results of the 3D-elastisity theory on the laminated sandwich plate developed by Panago. The numerical simulation model showed a good agreement to the results of Pagano's theory in terms of deflection, normal stresses, and shear stresses. In the second part of this study, the developed numerical simulation model was used to define different plates dimensions and fibers layup orientations to examine the load response in terms of deflection and stresses. Further analysis was implemented on the natural frequencies of laminated xxx plates of the plates. The layup configurations include Unidirectional (UD), Cross-Ply (CP), Quasi-Isotropic (QI), the linear bio-inspired known as Linear-Helicoidal (LH), and the nonlinear bio-inspired known as Fibonacci-Helicoidal (FH). The following numerical simulation model can be used for the design and study of novel, sophisticated bio-inspired composite structures in a variety of configurations subjected to sinusoidal or constant loads.
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Alfryyan Nada,Irshad Amna,Altaf Sehar,Basha Beriham,Al-Buriahi M. S.,Alrowaili Z. A.,Sabeeh Humera,Din Muhammad Imran 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.1
The current study is based on the synthesis of lanthanum ferrite (LF), silver-doped lanthanum ferrite (AgLF), and its composite with CNTs (AgLF@CNT) for degradation of organic effluents under visible light. The physiochemical characteristics of synthesized nanomaterials were examined by X-ray diffraction technique (XRD), Fourier transforms infrared spectroscopy (FTIR) and UV–Visible spectroscopy. XRD results revealed that the synthesized product has a crystalline structure. Tauc plot method was used to analyze the bandgap energy of the prepared nanocatalysts. Bare and doped lanthanum ferrite showed bandgap energy of 2.72 eV and 1.81 eV, respectively. The % degradation shown by LF, AgLF and AgLF@CNT for the degradation of methylene orange was 37.93%, 53.98%, and 78.26%, respectively. AgLF@CNT showed 74.42% degradation of crystal violet at the rate of 0.007 min−1. AgLF@CNT has an effective visible efficiency of photocatalysis for methylene orange and crystal violet degradation and gives better photodegradation efficiency due to a large number of active sites, greater surface area, good oxidizer and greater stability of carbon nanotubes.
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A simplified directly determination of natural frequencies of CNT: Via aspect ratio
Banoqitah, Essam Mohammed,Hussain, Muzamal,Khadimallah, Mohamed A.,Ghandourah, Emad,Yahya, Ahmad,Basha, Muhammad,Alshoaibi, Adil Techno-Press 2022 Advances in nano research Vol.13 No.3
In this paper, a novel model is developed for frequency behavior of single walled carbon nanotubes. The governing equation of motion is constructed method based on the Sander theory using Rayleigh-Ritz's method The frequencies enhances on increasing the power law index using simply supported, clamped and clamped free end conditions. The frequency curve for C-F is less than other conditions. It is due to the physical constraints which are applied on the edge of the CNT. It is observed that the C-F boundary condition have less frequencies from the other two conditions. The frequency phenomena for zigzag are insignificant throughout the aspect ratio. Moreover when index of power law is increased then frequencies increases for all boundary conditions. The natural frequency mechanism for the armchair (10, 10) for various values of power law index with different boundary conditions is investigated. Here frequencies decrease on increases the aspect ratio for all boundary conditions. The frequency curves of SS-SS edge condition is composed between the C-C and C-F conditions. The curves of frequency are less significant from small aspect ratio (L/d = 4.86 ~ 8.47) and decreases fast for greater ratios. It is found that the frequencies via aspect ratios, armchair (10, 10) have higher values from zigzag (10, 0). It is due to the material structure which is made by the carbon nanotubes. The power law index have momentous effect on the vibration of single walled carbon nanotubes. The present frequency result is also compared numerically experimentally with Raman Spectroscopy.
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