Papers by Oday Ibraheem Abdullah
Research Square (Research Square), Apr 23, 2024
FDTD simulations are used to investigate the homo-dimer nanostructures as localized surface plasm... more FDTD simulations are used to investigate the homo-dimer nanostructures as localized surface plasmon resonance when the predicted LSPR wavelengths of Ag, Au, and Al nanospheres in a homo-dimer arrangement are equated, the findings show that the Ag and Al homo-dimer exhibits a higher LSPR shift than the Au homo-dimer. Enhancements in intensity are brought about in the junction as a result of the interaction between the homo-dimer nanoparticle and it. It has been determined that the field enhancement for homo-dimer nanostructures composed of gold, silver, and aluminum has been compared, and theoretically, values in the visible range of DU.v-U.v. have been projected to be between 108 and 109.
International Journal of Applied Mechanics and Engineering, Mar 26, 2024
This research paper applies the finite element method as a methodology to evaluate the structural... more This research paper applies the finite element method as a methodology to evaluate the structural performance of nonlinear viscoelastic solids. A finite element algorithm was built and developed to simulate the mathematical nonlinear viscoelastic material behavior based on incremental constitutive equations. The derived Equation of the incremental constitutive included the complete strain and stress histories. The Schapery's nonlinear viscoelastic material model was integrated within the displacement-based finite element environment to perform the analysis. A modified Newton-Raphson technique was used to solve the nonlinear part in the resultant equations. In this work, the deviatoric and volumetric strain-stress relations were decoupled, and the hereditary strains were updated at the end of each time increment. It is worth mentioning that the developed algorithm can be effectively employed for all the permissible values of Poisson's ratio by using a selective integration procedure. The algorithm was tested for a number of applications, and the results were compared with some previously published experimental results. A small percentage error of (1%) was observed comparing the published experimental results. The developed algorithm can be considered a promising numerical tool that overcomes convergence issues, enhancing equilibrium with high-accuracy results.
Review on application of location tracking to monitor people in health field against Covid-19
Diagnostyka, Oct 27, 2023
Al-Khwarizmi engineering journal/Al-Khwarizmi engineering journal, Mar 1, 2024
The cap-sealing assembling machine is vital in various packaging industrial sectors, particularly... more The cap-sealing assembling machine is vital in various packaging industrial sectors, particularly the oil sector. The conventional control system of such machines suffers from many demerits, e.g. low productivity, high production cost, high rejection rate, and requires frequent maintenance. Therefore, the current research aims to develop a new control system (N.C.S) based on a programmable logic controller and human-machine interface system (PLSC&HMI). Hence, a fully automated cap-sealing assembling machine can be achieved. The machine is used to produce cap seals for engine oil containers. The performance of the new control system machine is evaluated and compared with the conventional control system (C.C.S) to examine the system feasibility and reliability. The aspects that are subjected to evaluation are the daily working hours (hrs.), glue consumption (Kg), and rejection rate (%). The independent t-test is conducted to deliver a fair comparison and approve the effectiveness of the proposed control system. The obtained findings give the significant development of the proposed control system based on the dependent t-test result. The working hours are reduced to 31.15 hours, and maintenance durations are lowered to the minimum. Also, the N.C.CS reduces the rejection by increasing the accuracy of the finished cap sealed from 88.3 to 99.42 % and consumed glues from 11.5 kg to 7.11 kg.
Scientia Iranica, Aug 29, 2023
In this modest work, we present a numerical study of the phenomenon of laminar natural convection... more In this modest work, we present a numerical study of the phenomenon of laminar natural convection in a vertical plate, whose wall was maintained at a constant temperature. It was assumed that the boundary layer problem was initially given in a two-dimensional flow even though the physical properties of the fluid were considered to be constant except for the density change with the temperature.The governing equations of the model have been transformed and simplified into a non-linear system of ordinary differential equations (ODE) through the use of similarity variables which we were able to solve numerically using the Runge-Kutta method. This method has better opted for the numerical resolution of this system which was developed in FORTRAN code on the computer. The numerical results of the model were presented in tabular form and the velocity and temperature profiles for various Prandtl numbers were analyzed and depicted graphically. Also, the expressions of the mean heat transfer rate and the average Nusselt number for the whole plate were obtained in the analysis. The results were compared at the end with the numerical results obtained in the literature, showing that they were in good agreement.
Curved and Layered Structures, 2024
The friction clutch is an important machine part in the torque transmission system, where it is r... more The friction clutch is an important machine part in the torque transmission system, where it is responsible for gently transmitting the power from the engine to the gearbox and damping the tensional vibration. At the beginning of the engagement between the clutch's elements, a large amount of heat is released due to frictional sliding between the elements of the clutch system, generating very high temperatures. In this work, the two-and three-dimensional finite element models were developed from scratch to explore the clutch disk's temperature and contact pressure behaviors using an alternative frictional material such as functionally graded material (FGM). The two assumptions for the thermal loads were considered: uniform wear and uniform pressure assumptions. The thermal-structural problem for the new frictional material was solved numerically and then presented as the temperature distributions and the contact pressure at any instant of sliding time. Also, a comparison was made between the clutch system behaviors when using FGM with different frictional materials. The results showed that the FGM has superior results to the other available frictional materials.
Tribology in industry, Mar 1, 2024
Increasing temperature due to frictional heat from sliding between contacting surfaces leads to i... more Increasing temperature due to frictional heat from sliding between contacting surfaces leads to increased wear and friction. Therefore, the researchers continue investigations to find the most suitable friction materials with good mechanical and thermal properties for frictional facings of clutch performance under this condition. In this research paper, the behavior and performance of the friction material HCC was studied under different normal load conditions (125, 175, 225, and 275 N) and different working environment temperatures (300 K and 390 K), where the rotation speed was 300 rpm. The results of the coefficient of friction and friction forces variation under different working conditions were analyzed and discussed in detail. XTM 500 tribometer test rig was used to perform the required tests, and the samples were made of the HCC friction material. The obtained results proved that the ambient temperature of the friction system has a significant negative effect on both the coefficient of friction and the force of friction. So, when the friction system's ambient temperature increases, the magnitude of the friction coefficient will decrease, and, thus, the transmitted torque will reduce too.
Optimization of the Small Horizontal Axis Wind Turbine Blade Based on the Interactive Design Approach
Lecture notes in networks and systems, 2023
Ibn Al-Haitham Journal For Pure And Applied Science, Apr 20, 2023
The concept of a 2-Absorbing submodule is considered as an essential feature in the field of modu... more The concept of a 2-Absorbing submodule is considered as an essential feature in the field of module theory and has many generalizations. This articale discusses the concept of the Extend Nearly Pseudo Quasi-2-Absorbing submodules and their relationship to the 2-Absorbing submodule, Quasi-2-Absorbing submodule, Nearly-2-Absorbing submodule, Pseudo-2-Absorbing submodule, and the rest of the other concepts previously studied. The relationship between them has been studied, explaining that the opposite is not true and that under certain conditions the opposite becomes true. This article aims to study this concept and gives the most important propositions, characterizations, remarks, examples, lemmas, and observations related to it. In the end, we will present a very important equivalent of our concept with the rest of the concepts presented previously.
Thermal Analysis of Functionally Graded Dry Clutch Disc Subjected to Characteristic Parameters Effects
Lecture notes in networks and systems, 2023
Archive of Mechanical Engineering
Open Engineering
In recent years, an increasing interest has been in applying the Metaverse to create unique educa... more In recent years, an increasing interest has been in applying the Metaverse to create unique educational settings. This article reports a review of the literature on Metaverse and its application in higher educational settings to understand its definitive features, evolution from ideation to higher educational use cases, accessibility and affordability, ethical issues, current trends, and future research needs for effective and efficient Metaverse application in higher educational settings. A total of 58 publications between 1992 and 2022 retrieved from Google Scholar and other online portals were reviewed. The review was carried out using Nvivo software for qualitative data analysis to identify and extract the main themes from the reviewed papers, which were then organized thematically, discussed, and presented in the current article. The findings from this review provide an overview of the development of the Metaverse and its application in higher education from a pre-Covid and pos...
Experimental and Numerical Analysis for Thermal Problem of Frictional Brake System
Computational Thermal Sciences: An International Journal
The present work aims to validate the experimental results of a new test rig built from scratch t... more The present work aims to validate the experimental results of a new test rig built from scratch to evaluate the thermal behavior of the brake system with the numerical results of the transient thermal problem. The work was divided into two parts; in the first part, a three-dimensional finite-element solution of the transient thermal problem using a new developed 3D model of the brake system for the selected vehicle is SAIPA 131, while in the second part, the experimental test rig was built to achieve the necessary tests to find the temperature distribution during the braking process of the brake system. We obtained high agreement between the results of the new test rig with the numerical results based on the developed model of the brake system. It was found in some cases the local zones with extreme heat generated in contacting surfaces due to the non-uniformity of the contact pressure during the braking process, where this phenomenon can be led to an increase in the magnitudes of t...
Lubricants, Apr 11, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
A study on the wind blade performance using blade element momentum theory
AIP Conference Proceedings, 2023
A New Correlation for Solar Radiation Incidence Angle and Dust Accumulation of Photovoltaic PV Systems
Environmental Research, Engineering and Management, Apr 11, 2023
Electronics
A systematic approach is presented to achieve the stable grasping of objects through a two-finger... more A systematic approach is presented to achieve the stable grasping of objects through a two-finger robotic hand, in which each finger cavity was filled with granular media. The compaction of the latter, controlled by vacuum pressure, was used to adjust the structural and contact stiffness of the finger. The grasping stability was studied under the concurrent effect of an external torque and applied vacuum pressure. Stable grasping was defined as the no slippage condition between the grasped object and the two fingers. Three control schemes were adopted and applied experimentally to ensure the effectiveness of the grasping process. The results showed that stable and unstable grasping regions exist for each combination of applied torque and vacuum pressure. The two-finger robotic hands can be further improved for applications that require high load-carrying capabilities.
Lubricants
Journal bearings in typical applications are subjected to misalignment due to several causes, suc... more Journal bearings in typical applications are subjected to misalignment due to several causes, such as shaft deformation under load and errors related to the installation and manufacturing processes. Misalignment has well-known severe negative consequences on the performance of the bearings. This paper deals with the bearing chamfer to reduce these consequences of misalignment, and two forms of bearing edge modification are considered in the analysis. These forms are linear and curved chamfering of the bearing edges, where the height of the chamfer in the circumferential direction and the length of the modification in the longitudinal direction are considered as geometrical design parameters. The investigation includes a numerical solution of the hydrodynamic lubrication problem of finite length journal bearing, considering 3D misalignment cases using the finite difference method. This includes the assessment of the chamfer forms and their effects on the bearing performance in terms ...
The impact of accidents during the transport of dangerous good, on people, the environment, and infrastructure and measures for their reduction: a review
Environmental Science and Pollution Research
Mathematics
Misalignment is one of the most common challenges that the normal operation of journal bearings f... more Misalignment is one of the most common challenges that the normal operation of journal bearings faces. This type of problem may be the result of a wide range of reasons, such as bearing wear, shaft deformation, and errors related to the manufacturing and installation process. The main undesirable consequences of the misalignment, such as pressure rise and lubricant film reduction, are concentrated on the bearing edges. Therefore, chamfering the bearing edges reduces such misalignment-related drawbacks. This work presents a novel numerical solution to the problem of finite-length journal bearing considering edge chamfering. This solution involves the determination of the levels of lubricant layer thickness and pressure distribution in addition to the journal trajectory under impact load with the related stability limits. The finite difference method is used in this solution, and the equations of motion are also solved numerically using the Runge–Kutta method. The Results of this nove...
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Papers by Oday Ibraheem Abdullah