Browsing by Author "Mohammed, Abrar A."

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Citation Count: 0
The effect of constant electric field on the crack growth process of aluminum nanosheet using molecular dynamics simulation
(Elsevier Science inc, 2024) Chen, Jinping; Salahshour, Soheıl; Mohammed, Abrar A.; Fadhil, Dalal Abbas; Al-Bahrani, Mohammed; Salahshour, Soheil; Sabetvand, Rozbeh
Aluminum nanosheets are a form of Al nanoparticle that have been recently manufactured on an industrial scale and have a variety of uses. Al nanoparticles are extensively used in a variety of sectors, including aerospace, construction, medical, chemistry, and marine industries. Crack propagation in various constructions must be investigated thoroughly for structural design purposes. Cracks in nanoparticles may occur during the production of nanosheets (NSs) or when different mechanical or thermal pressures were applied. In this work, the effect of a continuous electric field on the fracture formation process of aluminum nanosheets was investigated. For this study, molecular dynamics simulation and LAMMPS software were used. The effects of various electric fields on several parameters, including as stress, velocity (Velo), and fracture length, were explored, and numerical data were retrieved using software. The results show that the amplitude of the electric field parameter affected the atomic development of modeled Al nanosheets throughout the fracture operation. This effect resulted in atomic resonance (amplitude) fluctuations, which affected the mean interatomic forces and led the temporal evolution of atoms to converge to certain specified initial conditions. The crack length in our modeled samples ranged from 22.88 to 32.63 & Aring;, depending on the electric field parameter (0.1-1 V/& Aring;). Finally, it was determined that the crack growth of modeled Al nanosheets may be controlled using CEF parameters in real-world situations.
Citation Count: 0
Mechanical properties of aluminum /SiC bulk composites fabricated by aggregate accumulative press bonding and stir-casting process
(Elsevier, 2024) Daneshmand, Saeed; Salahshour, Soheıl; Basem, Ali; Mohammed, Abrar A.; Wais, Alaa Mohammed Hussein; Salahshour, Soheil; Hekmatifar, Maboud
Today, the emergence of composite structures can be considered a huge transformation on an industrial scale, especially in the transportation industry. Among all the structures made by the composite process, aluminum- based composites (AMMCs) are particularly popular both in the scientific and industrial fields. These structures are very light in weight and, at the same time, have significant strength. The ability to work with the machine in these structures is very high, and their plastic deformation is so high that they can be used in different industry sectors. Today, various methods are used to induce plastic deformation in aluminum-based composites (AMMCs). One of these methods is called aggregate accumulative press bonding (APB). The advantage of this method compared to other methods is that this method can create a homogeneous nanocomposite with ultra-fine grains. In the present study, the investigation of mechanical properties (MP's) of AA5083/5%SiC bulk composites fabricated via APB vs. pressing temperature (Temp) was conducted. All primary composite samples were fabricated via the stir-casting process (SCP). APB process was done on composite samples as a supplementary process. Finally, the effect of pressing Temp on the MP and microstructural properties (MSP) was investigated. The pressing Temp was varied between the ambient Temp's up to T = 300 degrees C. The MP were measured in this study by the Vickers micro-hardness (VMH) test, tensile test, and scanning electron microscopy (SEM). It was realized that the pressing Temp has a prominent effect on the MS and MP of fabricated 400 degrees C. degrees C . Samples fabricated at the ambient Temp have low ductility and high strength while for samples fabricated at T = 300 degrees C, the elongation and toughness values were higher than others. The TS of samples after 2 steps of APB at T = 200 degrees C degrees C is 1.31 times more than that of fabricated at T = 300 degrees C. degrees C . Elongation was reduced sharply to 1.8% after the two steps at the ambient Temp, while it was 21% for the annealed AA5083.
Citation Count: 0
The molecular dynamics simulation of coronavirus- based compound (6OHW structure) interaction with interferon beta-1a protein at different temperatures and pressures: Virus destruction process
(Pergamon-elsevier Science Ltd, 2024) Sun, Di; Salahshour, Soheıl; Aljaafari, Haydar A. S.; Cardenas, Maritza Lucia Vaca; Kazem, Tareq Jwad; Mohammed, Abrar A.; Eftekhari, S. Ali
The Interferon beta-1a protein is a cytokine in the Interferon family that is used to treat a variety of ailments. Molecular Dynamics simulation was used to characterize the atomic disintegration of 6OHW structure of a corona virus-based compound with Interferon beta-1a protein in this computational study. Molecular Dynamics simulation results on the atomic evolution of the 6OHW structure were presented with estimating physical variables. Physically, our simulations showed the attraction forces between the virus and the atomic protein in the presence of H2O molecules, resulting in viral annihilation after t = 10 ns. The molecular dynamics package's initial pressure and temperature (Temp) changes were important for virus-protein system evolution. Numerically, increasing primary T and P from 300 K and 1 bar to 350 K and 5 bar reduced the atomic distance between virus and protein structures from 10 & Aring; to 2.71 & Aring; and 2.45 & Aring;. Bonding energy was another reported physical quantity in our Molecular Dynamics simulation work. The atomic parameter ranged from 152.57 kcal/mol to 148.54 kcal/mol due to changes in initial Temp and pressure. Ultimately, the diffusion coefficient of protein being simulated inside the atomic virus changed from 0.48 mu m2/s to 0.59 mu m2/s. This calculation demonstrated the suitable conduct of simulated protein throughout virus destruction process.
Citation Count: 0
Prediction of heat transfer characteristics and energy efficiency of a PVT solar collector with corrugated-tube absorber using artificial neural network and group method data handling models
(Pergamon-elsevier Science Ltd, 2024) Li, Lei; Salahshour, Soheıl; Mohammed, Abrar A.; Montufar, Paul; AL-Maamori, Zainab M.; Sultan, Abbas J.; Esmaeili, Shadi
Photovoltaic thermal (PVT) systems offer an attractive prospect to produce thermal and electricity powers when used as the building envelope. The present numerical analysis is performed intending to evaluate the thermal, electrical, and overall efficiencies of a PVT unit with a corrugated serpentine absorber tube filled with the A(2)O(3)/water nanofluid. The influence of Reynolds number (Re) and nanoparticle concentration (w) on the performance metrics of the system is analyzed. The result indicated that within the w range of 0-1%, the increment in Re from 500 to 2000 diminishes the PV panel temperature by 3.13-3.32%, while pressure drop boosts by 5480.95-5580.06%. The increase in w from 0% to 1%, however, declines the PV panel temperature and pumping power by 0.43-0.62% and 1.25-2.97%, respectively. The range of changes in the overall efficiency was 60.38-90.45%, the maximum and minimum of which belong to Re = 2000&w=1% &w =1% and Re = 500&w=0%, &w =0%, respectively. The results of artificial neural network (ANN) modeling presented an accurate function for estimation of the overall efficiency of the studied PVT unit based on the Re and w with the R-squared coefficient of determination of R-2 = 0.99602.