Oday I. Abdullah

Verified

Oday verified their affiliation via an institutional email.

Learn more

Verified

Oday verified their affiliation via an institutional email.

Learn more

• Ph.D.
• Professor (Full) at University of Baghdad

The demand of the current industrial applications to high power generation results in a further increase in the rotating machinery speed which in itself may cause unstable oscillations. Unbalanced excitation and shaft deviation represent significant challenges that are faced by the designers and operators of the rotor-bearing systems, which negativ...

In this research article, a developed approach was introduced for the design and optimization of small wind turbine blades based on computational tools such as FAST and QBlade to address challenges in aerodynamic analysis, structural integrity, and power output prediction. A key focus is on optimizing airfoil selection based on lift-to-drag ratios,...

During the vehicle exploitation in the conditions of stop and go, or during to the maintain of constant vehicle speed on the long downhills, it comes to the generation of high temperatures on the brake system executive organs. With the correct design of the brake disc, the generation of the excessive temperature can be avoided, what is and the purp...

The clutch system is essential for gently transmitting power from the engine to the gearbox, in addition to other tasks such as absorbing vibration, inertia reducing, and working as a protector against the overload for the motor and the components of power transmission. A new approach is developed for this research paper, to find a dry clutch syste...

Completely symmetrical 6,6’-cyclohexane-1,1-diyl bis (3-substituted-3,4-dihydro-2H-1,3-benzoxazine) synthesized compounds have been able by a two-step process that yields a large amount of the compound. First, phenol and cyclohexanone were subjected to the Friedel-Craft process to produce 1,1’-bis(4-hydroxyphenyl) cyclohexane. The reaction between...

Water pollution has increased in recent years with pharmaceutical pollutants, such as tetracycline pollution. This pollutant has a harmful effect on the environment, water resources, agriculture, and drinking water for humans, animals, and agriculture. This research aims to use some nano oxides (vanadium pentoxide and nickel oxide) as an adsorbent...

The current research is focused on developing and evaluating new composite materials that are reinforced with natural fibers to enhance sustainability and create environmentally friendly composites. The use of both wool and Periploca laevigata Aiton fibers was chosen in the construction of the hybrid composite due to their similar organic compositi...

In recent years, there has been a rising demand for minimizing any power loss in industrial applications due to the direct relation to economic as well as climate considerations. This work investigates the parameters that affect the frictional power loss in journal bearings as they are widely used in such applications. The frictional power loss is...

Fiber-reinforced elastic laminated composites are extensively used in several domains owing to their high specific stiffness and strength and low specific density. Several studies were performed to ascertain the factors that affect the composite plates’ dynamic properties. This study aims to derive a mathematical model for the dynamic response of t...

Most renewable energy sources are intermittent and seasonal, making energy storage and consumption problematic. Hydrogen gas can save and convey chemical energy, making it a promising sustainable energy source. Electrochemical water electrolysis technology’s sustainable and efficient hydrogen gas production attracts global attention. Higher hydroge...

It can be considered the Control panels for monitoring and controlling the quality of production based on scientific statistical methods are one of the necessary analyses in the industrial sectors. The main objective of this analysis is to make a decision regarding the progress of the production process for each stage of production. The random samp...

This research employs Computational Fluid Dynamics (CFD) simulations to investigate the aerodynamic characteristics of a wind turbine blade. Focusing on critical parameters such as velocity, pressure, and streamlines, the study provides a thorough analysis of fluid dynamics during the interaction between the rotating blade and wind. Specific attent...

When a component was built from a functionally graded material (FGM), the temperature of contact was determined using an analytical model (FGM). The analytical solution is applied using the concept of equivalent properties. In order to fully examine the dynamic of the equivalent property principle, a numerical analysis was done. The FGM (silicon ca...

Optimizing the bearing design is an essential step to maintain safe operation and extend the bearing life. Taguchi method is one of the powerful methods in this direction, which can be used to assess the geometrical design parameters under shaft deviation. Shaft deviation is unavoidable in the industrial applications of journal bearing. It results...

This research paper presents a developed technique for Friction Stir Spot Welding (FSSW) to join similar aluminum sheets (6061), and then this technique was analyzed critically based on numerical simulation and experimental work. The objective of this Developed Friction Stir Spot Welding (DFSSW) is to avoid or at least reduce the keyhole defects by...

The production of grain-oriented, electrical steel consists of a series of processes that lead to a product with superior magnetic properties used in transformers due to the low core loss. The unique properties are gained during the process of secondary recrystallization and abnormal grain growth. The abnormal grain growth occurs during a process o...

The ceramic membrane surfaces coated with cysteic acid were tested for efficacy and the fouling rate at constant crossflow velocities (CFV) and two transmembrane pressures (TMP). The crossflow mode was used during the filtration process to enable the membranes to perform for longer periods. The calculated variability and substance rejection were us...

يقدم هذا العمل دراسة شاملة عن تقييم أداء خوارزميات التعلم الآلي المختلفة للصيانة التنبؤية في سياق مراقبة حالة محرك التيار المتردد. يركز البحث على سيناريوهات واقعية لتقييم قدرات الخوارزميات المختلفة في التنبؤ بكل من حدوث الأعطال ونوع الفشل المحدد في محركات التيار المتردد. يتم استخدام خمس خوارزميات بارزة للتعلم الآلي، وهي Random Forest (RFC)، وSuppor...

Fire incidences are classed as catastrophic events, which mean that persons may experience mental distress and trauma. The development of a robotic vehicle specifically designed for fire extinguishing purposes has significant implications, as it not only addresses the issue of fire but also aims to safeguard human lives and minimize the extent of d...

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 e...

In this present work, the laminar free convection boundary layer flow of a two-dimensional fluid over the vertical flat plate with a uniform surface temperature has been numerically investigated in detail by the similarity solution method. The velocity and temperature profiles were considered similar to all values and their variations are as a func...

This research paper focuses on enhancing the surface characteristics of the 316 stainless steel (SS316) alloy, including roughness, microhardness, and corrosion resistance. Where the application of ND-YAG laser technology, a highly relevant and timely area, was investigated deeply. The Q-switching Nd: YAG Laser was used with varying laser energy le...

With the paramount development of industry and agriculture sector, levels of different pollutants like, heavy metal ions, pharmaceuticals, organic dyes, biological waste and other pollutants are becoming serious. The ecosystem and human health suffered greatly from the adverse effects of these pollutants. The disposal of these pollutants has become...

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...

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 cont...

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 p...

The paper contributes a pivotal solution addressing the potential hazards of LPG. It underscores the proactive measures that can be undertaken to curtail risks, fostering a safer environment for both industrial activities and the broader society.A leak detection unit for the gas reticulation system was developed based on the automatic shut-off usin...

The simulation of the fracture problems in the machine elements made from composite materials are considered necessary in different engineering fields. The study of cracks in composite materials is of interest to modern research. This research paper is interesting in studying the crack in the wind turbine blade using the XFEM method to fill the gap...

The microwave-assisted pyrolysis (MAP) is a promising technology for converting waste feedstocks (AWB and PW) into valuable products, primarily biochar. The residual product generated from the AWB and PW MAP process is called hybrid biochar. The hybrid biochar made by MP is highly stable, has distinctive physical and chemical characteristics, and o...

The brake system is a vehicle's most major element, responsible for the safety of the car and passengers, in addition to the safety of pedestrians, vehicles, and property on both sides of the road. One of the main problems that lead to failures of the brake system is the excessive heat that is generated due to friction during the braking operation....

In this paper, steady laminar boundary layer flow of a Newtonian fluid over a flat plate in a uniform free stream was investigated numerically when the surface plate is heated by forced convection from the hot fluid. This flow is a good model of many situations involving flow over fins that are relatively widely spaced. All the solutions given here...

Titanium alloys are broadly used in the medical and aerospace sectors. However, they are categorized within the hard-to-machine alloys ascribed to their higher chemical reactivity and lower thermal conductivity. This aim of this research was to study the impact of the dry-end-milling process with an uncoated tool on the produced surface roughness o...

The friction clutch design strongly depends upon the frictional heat generated between contact surfaces during slipping at the beginning of the engagement. Firstly, the frictional heat generated reduces the performance of the clutch system and then leads to premature failure for contacting surfaces in some cases. The experimental effort in this wor...

Crowning is applied to wind turbine gears, including spur gears, to ensure adequate stress distribution and contact localization in wind turbine main gearbox gears to improve the gear performance in the presence of misalignments. Each gear tooth is crowned along the face width using a parabolic curve that graduates from a maximum height at the edge...

Citation: Jamali, H.U.; Mohammed, M.N.; Aljibori, H.S.S.; Jweeg, M.J.; Abdullah, O.I. A Novel Optimization Strategy of Bearing Geometry with a Length to Diameter Ratio of 1.25 under Severe Operating Conditions Using Taguchi Method. Designs 2023, 7, 121. https://doi. Abstract: Robust and well-designed rotor-bearing systems ensure safe operation and...

A variety of bearing profile designs can be used to improve the performance of a rotor–bearing system in severe conditions, such as operating with a shaft misalignment. Misalignments usually occur due to a deformation of the journal, bearing wear, and installation errors. This paper investigates the effects of bearing design parameters under a 3D j...

Improving the bearing design helps in reducing the negative consequences related to errors in installation, manufacturing, deflections under severe loading conditions, progressive wear of machine elements, and many other aspects. One of the methods of such a design improvement effort is changing the bearing profile along the bearing width to compen...

Abstract: 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...

The brake system is the most significant component of a vehicle because it protects the driver, passengers, other road users, and property on both sides of the road. The basic principle of the disc brake system depends on the friction-based between the brake pads and rotor disc.The paper introduced a developed 3D finite element thermal model of the...

A dry clutch is a gadget utilized in vehicles for power move from the motor to the transmission framework. The lifetime of a friction clutch is profoundly reliant upon the life and execution of the clutch plate. A car dry contact clutch framework comprises of a flywheel, a pressure plate, and a clutch plate. The clutch disk includes frictional mate...

Wind energy is one of the most important sources in the renewable energy field. The modern small wind turbine blade is manufactured from composite materials. In this study, the finite element technique was used to simulate a 3D model of a small wind turbine blade to optimize the blade material. Four composite materials were used (carbon/epoxy, Kevl...

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 c...

In this research paper, the aerodynamic performance of the blade of horizontal axis wind turbine has been investigated numerically based on the the Blade Element Momentum (BEM) method. The blade in this analysis is divided into several computational elements, where assumed no aerodynamic interaction between the elements. The primary objective is to...

It can be considered that electric generating power from solar energy is an essential topic in the energy field. Several environmental factors affect the energy production of solar cells. Dust accumulation is one of the main factors which significantly negatively influences output energy. However, this topic is not investigated extensively, despite...

The performance of journal bearings is significantly affected by the presence of misalignment, which is usually an accompanying problem for this type of bearing. This includes exceeding the design limits for the maximum pressure and the minimum film thickness levels, which affect, in other words, the load-carrying capacity of the system. In additio...

The automobile contains several very important parts, one of which is the friction clutch. Its importance comes from being it is a mechanical coupling device that plays the role of connecting and transmitting the torque generated in the engine to the gear set in the gearbox. The friction material is an important parameter due to withstand the mecha...

The most important machine elements of the braking system are the brake disc and pads. During the braking process, the braking torque is necessary to decelerate the speed of the vehicle or stop it. High amount of frictional heat will be generated during the braking process due to the sliding between the moving part (brake disc) and fixed parts (bra...

In this article, the model of a 5 kW small wind turbine blade is developed and improved. Emphasis has been placed on improving the blade’s efficiency and aerodynamics and selecting the most optimal material for the wind blade. The QBlade software was used to enhance the chord and twist. Also, a new finite element model was developed using the ANSYS...

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...

Road transport is one of the most dangerous methods of goods transport. Driver errors and poor traffic conditions can cause traffic accidents, which can have a negative impact on people’s health, the environment, and infrastructure. The main influence on the level of the consequences is the chemical composition and amount of the transported substan...

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 r...

The main task of the frictional facing of a clutch disc is to transfer the power from the driving to the driven parts. High frictional heat will be generated when the frictional facing comes into contact with the moving surfaces (flywheel and pressure plate). In this research paper, the selection of the frictional‐facing material of the clutch disc...

In this paper, the horizontal axis wind turbine (HAWT) blade model with a power of 5 kW and a length of 2.5m was designed using MATLAB code based on the blade element momentum theory (BEMT) method. The ANSYS software was used to simulate and validate the Finite Element Model (FEM) to compaute the deflections of the blade under the normal operating...

The success of the thixoforming process largely depends on the created microstructure, which must be globular in the liquid phase. The solid–liquid structural changes that occur on as-annealed D2 tool steel when it is subjected to the so-called DPRM are described in this work (direct partial remelting method). The paper discusses phase changes and...

In this research paper, the aerodynamic performance of the blade of horizontal axis wind turbine has been investigated numerically based on the the Blade Element Momentum (BEM) method. The blade in this analysis is divided into several computational elements, where assumed no aerodynamic interaction between the elements. The primary objective is to...

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...

Different nanoparticles of iron oxides (Fe 2 O 3 and Fe 3 O 4) were prepared by the hydrothermal method. These nanoparticles were heated at 90°C and at 400°C. The morphology and structures of the heated samples were characterized using different measurements such as FT-IR, UV-visible, scanning electron microsco-py (SEM), atomic force microscope (AF...

During the repeated braking, it will generate high amount of heat on the braking disc and braking pads. The value of the generated heat depends on many factors such as the vehicle speed, materials properties, disc brake construction, as well as the number of braking cycles. The aim of this paper is to investigate the effect of repeated braking on t...