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Enhancing Wind Tunnel Computational Simulations Of Finite Element Analysis Using Machine Learning-Based Algorithms, Luttfi Al-Haddad, Alaa Jaber, Latif Ibraheem, Sinan Al-Haddad, Naseem Ibrahim, Fawaz Abdulwahed

Engineering and Technology Journal

Wind tunnels are essential for examining aircraft model aerodynamics, accurately simulating real-world conditions, and enhancing design and performance evaluations. This study introduces a novel technique to improve the time and accuracy of stress distribution forecasts in wind tunnel simulations. This method combines Finite Element Analysis (FEA) with two regression models: Support Vector Machine (SVM) and k-Nearest Neighbors (kNN). The investigation begins with a thorough analysis of ANSYS fluent flow data, which reveals intricate fluid dynamics details within the wind tunnel. A comparative analysis of stress projections, supplemented by Root Mean Square Error (RMSE) metric, demonstrates the proposed methodology’s viability. High …

Application Of Discrete Wavelet Transform For Condition Monitoring And Fault Detection In Wind Turbine Blades: An Experimental Study, Ahmed Ogaili, Mohsin Hamzah, Alaa Jaber, Ehsan Ghane

Engineering and Technology Journal

Effective structural monitoring maximizes efficiency in wind turbines, a crucial renewable energy asset. Using advanced condition monitoring techniques is crucial for reliability. This experiment shows how to use DWT and FFT for wind turbine blade fault detection. DWT allowed for multiresolution analysis of vibration signals from a healthy and eroded lab-scale turbine blade under controlled wind speeds. A 5-level DWT decomposition identified frequency sub-bands with localized fault information. The FFT post-processing of level 5 approximation coefficients revealed precise modal frequency shifts between blade states. The healthy blade showed a dominant 16 Hz mode that matched operational dynamics. Erosion caused a …

Enhancing The Solar Still Performance Using Different Designs Of Absorber With Heat Storage Materials And Different Wick Materials: A Review, Lujain Hyal, Jalal Jalil, Abduljabbar Hanfash

Engineering and Technology Journal

Despite water covering more than two-thirds of the planet, improving potable water production technologies is a significant issue because of the increased demand for treated water. Solar desalination presents a simple, costless energy and friendly technology which utilizes solar energy and gives great incentive to decrease pollution effects produced by burning fossil fuels. In order to address the global drinking water shortage, particularly in rural and distant locations, this technique can be employed to give pure water to people using a solar still, which in many respects, is one of the most significant feasible uses of solar energy and perfect …

Experimental And Theoretical Analysis To Produce Pentagonal Cup In Deep Drawing Process, Zainab Mohsen, Waleed Jawad, Assel Abed

Engineering and Technology Journal

The manufacturing industry heavily relies on deep drawing due to its remarkable ability to produce intricate symmetrical and asymmetrical shapes with accuracy and efficiency. This research aimed to create a deep drawing tool capable of producing a pentagonal cup measuring 41mm in diameter and 30mm in height. This was achieved by conducting numerical simulations and experimental tests using two different methods. The first method involved converting an 80mm diameter circular blank into a pentagonal cup through a drawing operation, while the second method involved redrawing a cylindrical cup into a pentagonal shape. The study also analyzed the impact of these …

A Static And Dynamic Analysis Of A High-Speed Turbo Machine Foundation, Ameer Ahmed, Mohammed Fattah, Makki Mohsen

Engineering and Technology Journal

The foundation plays a significant role in safe and efficient turbo machinery operation. Turbomachinery generates harmonic load on the foundation due to its high-speed rotating motion, which causes vibration in the machinery foundation. Any increase in machine vibration reduces the machine's performance. In studying engineering problems, using numerical programs helps get a well-designed foundation. Before conducting a parametric study, the program used shall be validated and/or verified by conducting a series of analyses to ensure that the program output represents the reference studied cases well. In many cases, the real problem is simplified by assuming that the machine's loads are …

Stay In Place Formwork, Encased Reinforced Concrete Column: A Review, Zainab Abbas, Maan Hassan, Iqbal Gorgis

Engineering and Technology Journal

Formwork systems are required for almost all cast-in-place concrete construction. However, some forms cost too much, often exceeding 30% of the entire cost of the concrete construction. Thus, the stay-in-place (SIP) formwork, a premanufactured permanent constructional member that holds fresh concrete to the intended sizes and stays in the site to afford loads over the construction lifecycle, could be an auspicious alternative to the classic formwork procedure. Several types of stay-in-place (SIP) formworks for columns have been reviewed, like PVC tubes, CFRP, steel tubes, and the composite of two or more types of stay-in-place (SIP) formwork used together. Moreover, some …

Enhancing Pullout Load Performance Of Under-Reamed Piles In Homogeneous Layered Clay: A Numerical Comparative Study, Anji Al-Bayati, Mohammed Al-Neami, Falah Rahil

Engineering and Technology Journal

A 3D numerical model generated using PLAXIS-3D software was used in the present research to predict the behavior of under-reamed piles under pullout loading conditions with presumed soil Mohr-Coulomb failure. The under-reamed pile was embedded in homogeneous, layered clay soil, with stiff clay overlain by soft clay and soft clay overlain by stiff clay. The piles were chosen per the Indian Code (IS 2911) specification, and two variables were studied: bulb provision and soil layering. Inhomogeneous clay with varying cohesion values (20, 40, and 80 kPa) and under the same conditions, the pullout capacity was improved compared to a straight …

Comparative Study Of Three Saw Configurations For Temperature Sensing, Serhane R., Belkhelfa N.

Engineering and Technology Journal

This paper demonstrates three SAW configurations' electrical and mechanical behaviors: a one-port resonator, a two-port resonator, and a delay line that works as temperature sensors of around 440 MHz characteristic frequencies. We investigate the sensitivity of the sensors for temperatures up to 200 °C. A linear behavior of the frequency shift versus temperature is observed; the resulting sensitivity of the sensors is evaluated at 22.74 ppm/°C for the one-port resonator, 23.17 for the two-port resonator, and 3.83 ns/°C for the delay line structure. The electromechanical coupling coefficient (k2) is 0.492 % for the delay line, 0.489 % for the one-port …

Performance Analysis Of Underwater Optical Communication System In Turbulent Link, Murtadha Joudha, Jassim Hmood, Salah Adnan

Engineering and Technology Journal

Underwater wireless optical communication (UWOC) systems have been identified as a suitable replacement technology with high data rates over relatively medium transmission ranges for underwater communication. In the research, we propose a new optical hybrid modulation format for carrying the letters over underwater wireless optical communication (UWOC) system. This hybrid modulation format combines pulse position modulation (PPM) with digital pulse interval modulation (DPIM) to increase the transporting speed. The proposed UWOC system is experimentally investigated in the laboratory over a clean and turbulent water channel. The message was electrically modulated in the transmitter with PPM-DPIM format and then applied to …

Prediction Of Fresh And Hardened Properties Of Concrete Containing Nanostructured Cassava Peel Ash Using Ibearugbulem's Approach, Chidobere Nwa-David, David Onwuka, Fidelis Njoku, Owus Ibearugbulem

Engineering and Technology Journal

Statistical methods such as Scheffe’s and Osadebe’s models are commonly employed for the optimization of concrete properties. Despite their prediction suitability, attention is drawn to their drawback. Ibearugbulem’s model has been developed to address these shortcomings. In this study, Ibearugbulem’s optimization method was employed to formulate a mathematical model for prediction and strength-optimization of nanostructured cassava peel ash (NCPA)-cement composite. The variation of 28 days compressive strength and initial and final setting time of NCPA-concrete was evaluated. Based on the establishment of a spatial domain for each concrete mixture variable, the response function is expressed as a multivariable function for …

Stress Analysis Of Transversely Loaded Isotropic Three-Dimensional Plates Using A Polynomial Shear Deformation Theory, Festus Onyeka, B. Mama, Chidobere Nwa-David

Engineering and Technology Journal

An exact solution for the bending attributes of a thick rectangular plate under transverse loading is modeled herein using three-dimensional (3-D) elasticity plate theory and fourth-order polynomial shear deformation function. Precluding coefficients of shear correction, this model captured the effect of shear deformation along with the transverse normal strain stress. The expression for total potential energy was derived from a 3-D kinematic and constitutive relation the equilibrium equation was developed and employed from the energy functional transformation to get the relationship between slope and deflection. Exact polynomial functions were obtained from the outcome of the equilibrium equation and with the …

A Survey On Microstrip Single/Multiband Bandpass Filter For 5g Applications, Halah I. Khani, Ahmed S. Ezzulddin

Engineering and Technology Journal

For a long time, extensive research on microstrip bandpass filters has been documented to meet the standards of modern multiservice wireless communication systems. The multiband bandpass filters (BPF) are required for the receiver front end to function as a single device that caters to many bands at the same time. Planar bandpass filters are particularly promising because of their simplicity of manufacture using printed circuit technology, compactness, and low integration cost. Due to the need for high integration, low cost, and high-speed data transmission, the design and implementation of filters for fifth-generation (5G) mobile communication systems is difficult. This paper …

Antenna Gain-Bandwidth Enhancements Using Crlh Hilbert Fractal-Based Structure, Marwa Ismail, Taha Elwi, A. Salim

Engineering and Technology Journal

With the development of communication systems, antennas of small size and high gain have become essential to keep up with the new challenges. The metamaterials made these challenges possible. In this paper, a new low-profile metamaterials-based array is designed. The array unit cell comprises a symmetric composite right left hand (CRLH) unit cell. A third-order Hilbert curve structure replaces the VIA, and aperiodic slots are introduced between the unit cells to enhance the overall performance. This design provides a significant improvement over the original design. CST MWS was used to stimulate the design. Gain and S11 are calculated to evaluate …

Hydrodynamic Model-Based Evaluation Of Sediment Transport Capacity For The Makhool-Samarra Reach Of Tigris River, Ala Nama, Ali Abbas, Jaafar Maatooq

Engineering and Technology Journal

This paper implemented an HEC-RAS-based steady two-dimensional hydrodynamic model to evaluate the hydraulic characteristics and Sediment Transport Capacity (STC) of the Makhool-Samarra Reach of the Tigris River, where this part is not already investigated. This model was prepared with the aid of topographical surveys, hydraulic measurements, and laboratory tests, as well as recorded data. The main findings show that the flow velocities within most of the studied reach are considered high compared to the local and worldwide flow velocity ranges in natural rivers. Also, the Toffaleti sediment transport function with the Van Rijn fall velocity and the effective depth-to-width computation …

Analytical Solution For The Static Bending Elastic Analysis Of Thick Rectangular Plate Structures Using 3-D Plate Theory, Festus Onyeka, Chidobere Nwa-David, Thompsom Edozie

Engineering and Technology Journal

In the current work, an analytical solution for static bending analysis of the thick rectangular plate structure was obtained using three-dimensional plate theory. First, the energy equation was formulated from the static elastic principles and transformed into a compatibility equation through general variation to get the slope and deflection relationship. The solution of the compatibility equation gave rise to the exact polynomial deflection function. In contrast, the coefficient of deflection and shear deformation of the plate was obtained from the governing equation through the direct variation method. These solutions were used to obtain the characteristic expression for analyzing the displacement …

The Performance Of Helical Pile Under Cyclic Load Using 3d-Finite Element Analysis, Ahmed Ali, Nahla Salim, Husam Baqir

Engineering and Technology Journal

Helical piles are a kind of foundation that can withstand compression, tension, and lateral stresses. However, this kind of pile was utilized extensively globally for almost 25 years. Its behavior, particularly in Iraq, is uncertain and frightening. The current research used the finite element technique to analyze this kind of pile. The helical pile geometry was suggested to be modeled using the finite element method using the computer software Plaxis 3D The soil used is medium sandy soil. Additionally, parametric analyses were conducted. The primary parametric research examines the impact of helix number, helix spacing, helix diameter, and helix configuration …

Measurement Of The Lateral Earth Pressure Coefficient Of Clayey Soils By Modified Oedometer Test, Kumail Alkhafaji, Mohammed Fattah, Makki Al-Recaby

Engineering and Technology Journal

The coefficient of lateral earth pressure at rest (K0) explains the connection between the effective vertical and lateral stresses. Geotechnical engineers have studied K0 for many years for its being a key element in the designs and analysis of various geotechnical problems such as slope stability, piles, and earth retaining structures. Moreover, K0 has played a critical phase in any numerical study of the soil-water combined geotechnical boundary value issues requiring parametric stress-strain time formulations During the previous few decades. A modified apparatus consisting of a standard Oedometer equipped with Force Sensitive Resistance (FSR) is used to investigate the value …

Desulfurization Of Real Diesel Fuel Onto Mesoporous Silica Mcm-41 Implementing Batch Adsorption Process: Equilibrium, Kinetics, And Thermodynamic Studies, Ammar Kadhum, Talib Albayati

Engineering and Technology Journal

In the current work, sulfur was removed from actual diesel fuel containing 1.2 wt.% sulfur from the Al-Dura Oil Refinery (Iraq), which was studied using adsorption desulfurization with the spherical mesoporous silica MCM-41. This study investigated the effects of different operating conditions, including the dose of MCM-41 (0.04-0.2 gm), time (60-180 min), and temperature (30-70°C). The optimal working conditions were determined to be 0.4 gm MCM-41, 180 min, and 70°C. After exploring the isotherm models of Langmuir, Freundlich, and Temkin, Temkin models with a correlation coefficient (R2 = 0.9996) were selected to best represent the stable data. The kinetics of …

High Gain Transformer-Less Inverter Based-On Capacitor Clamping Multi-Phase Boost Converter, Oday Saad, Jasim Hussain

Engineering and Technology Journal

ABSTRACTThe boosting converters integrated with inverters are widespread use in many applications under transformerless inverter titles, including powered vehicles, PV systems, fuel cells systems and so on. Reliability, quality, maintainability, and reduction in size are important requirements in the energy conversion process. The multi-phase boost converter can be adopted as a good solution with high power applications. The multi-phase boost enhanced by clamping capacitor structure is providing low ripple, high gain and evident improvement in the efficiency when compared to the conventional converters. This paper investigates the transformerless inverter based on a capacitor clamping multi-phase boost converter. High gain proposed …

Thermal Behavior Simulation Of An Externally Cooled Electric Motor, Noureddine Meneceur, S. Boulahrouz, A. Boukhari, R. Meneceur

Engineering and Technology Journal

This paper presents the simulation results of the thermal behavior for an externally cooled asynchronous electric motor in both steady and transient states cases. For this purpose, a mathematical model based on the heat equation is first developed to determine internal thermal sources such as copper, mechanical and iron losses. Then, a computer program is developed to numerically simulate the proposed mathematical model. This program determines the radial distribution of steady and transient states temperatures, and predicts the effect of the ambient temperature on the transient and permanent temperature distributions. This makes it possible to calculate the specific speed of …

Electrostatic Deposition Of Poly(Methyl Methacrylate)/Titanium Carbide Coatings On Austenitic 316l Stainless Steel Implant, Ghofran Dhafer, Mohanad Al-Shroofy, Hanaa Al-Kaisy

Engineering and Technology Journal

316L stainless steel alloys are extensively used in orthopedic applications for the fixations and substitutions of defective bone tissues in the human body because of their excellent combination of mechanical and biological behavior. However, just like other metallic implants, they tend to release some toxic ions that may lead to serious health issues. Therefore, this study attempts to increase the alloy's resistance against corrosion while maintaining its good mechanical properties by applying a modified coating layer of PMMA-based composites titanium carbide as reinforcement material using dry electrostatic spray deposition (ESD) under constant conditions (25 kV, 15-20 cm distance, compressed air …

Synthesis Zno Heterostructured Nanophotocatalyst Simulated Solar Light Irradiation For Removal Contaminate Carbamazepine In Aqueous Solution, Eman Rdewi, Ahmed Abdulkadhim Al-Ghaban, Khalid Abbas

Engineering and Technology Journal

In this study, zinc oxide nanoparticles (ZnO) were produced in aqueous media to photodegrade harmful carbamazepine compounds (CBZ) in aqueous solution under simulated solar-light using the sol-gel technique with zinc chloride and NaOH as precursors. X-ray diffraction (XRD), FTIR analysis, Field Emission Scanning Electron Microscopy (FE-SEM), and UV–vis diffuse reflectance spectra (UV-vis DRS) were used to analyze the ZnO NPs powder. According to the XRD results, ZnO nanoparticles showed a hexagonal symmetry shape with 13 nm particle size value. The absorption bands of ZnO nanoparticles were identified using FT-IR spectra peaking. The ZnO nanoparticles produced in this work are spherical, …

Structural Characterization Of (Mg(1-X)Pbxo)-Nps By Modified Pechini Method, Israa Najem, Fadhil Abd Rasin, Shaker Edrees

Engineering and Technology Journal

The structural characterization was discussed in the present paper of the pure MgO nanoparticles and the doped (Mg(1-x)pbxO) nanoparticles specimens, where (0 ≤ x ≤ 0.03). The modified Pechini method was used to prepare all the specimens. From (DTA), the convenient temperature of decomposition from Mg(OH)2 to MgO was above 375°C. The structure investigation (XRD) revealed that all the specimens have identical space groups and index well to cubic structures. The obtained crystallite size by Scherrer''s equation was increased with increasing the fraction of doping except for (Mg0.97Pb0.03O) due to the formation of PbO oxide. The molecular vibration by FTIR …

Monitoring Soil Degradation In The Mesopotamian Plain Using Gis And Remote Sensing Techniques, Abdulrazak Ziboon, Muthanna Albayati, Fadhaa Dalhel

Engineering and Technology Journal

In the present work , various remote sensing techniques have been used to investigate soil degradation in Iraq (The Mesopotamian plain) for the period (1976 - 2021) using different research and data like satellite image such as (Landsat 1-5 MSS 1976 , Landsat 4-5 TM C1 Level-1 1996, Landsat 8 2016 and sentinel-2 2021 ) , using different Program and software (ENVI 5.3 which extract data from image satellite by using TCT , EMI and NDVI indicators , Eras image 2015 use to subset area of interest ,layer stack and merge resolution , Arc GIS 10.7 use to make database …

3d Numerical Modeling Of Soft Soil Improved By Rigid Inclusions Supported An Embankment, Messioud Salah, Neghmouche Yassamina

Engineering and Technology Journal

Abstract A three-dimensional finite element model suggested to determine the settlements and stresses of an embankment placed on soft soil reinforced by rigid inclusions. To make it simple the layers of soil and the embankment are supposed to be horizontal in a semi-infinite medium and the base of the soft soil is supposed to be rigid (bedrock). The interacting elements of the model are supposed to be elastic. The determination of the behavior of the soil-inclusions-embankment system was realized according to the construction phases of the embankment layers. The settlements and stresses were calculated according to construction phases of the …

Fpga-Based Single-Phase Pv Inverter Using Unipolar And Bipolar Spwm Control Techniques, Murtadha Sadeq, Hanan A. Akkar

Engineering and Technology Journal

The study presents circuitry modeling and methodology to integrate solar photovoltaic (PV) energy with grid (AC) sources to supplement household appliances during a power cut-off or restricted supply period and alternating charge deep cycle batteries. This paper discusses an FPGA-based Sinusoidal Pulse Width Modulation (SPWM) generator as a control mechanism for a PV/Battery full-bridge inverter. The inverter's efficacy is expressed as the Total Harmonic Distortion (THD) ratio, which must be as low as possible. Various schemes are proposed to reduce THD to generate a more sinusoidal output wave. SPWM is mostly used in industrial inverters. Two SPWM techniques, Bipolar and …

Design Of A Sliding Mode Controller For A Prosthetic Human Hand’S Finger, Hussein Majeed, Saleem Kadhim, Alaa Jaber

Engineering and Technology Journal

In this research paper, the modeling and control of a tendon-driven, instead of joint motors, the prosthetic finger that mimics the actual human index finger were deliberated. Firstly, the dynamic model of the prosthetic finger is developed based on a 3-degree of freedom (DOF) articulated robot structure and utilizing the Lagrange equation. Then, the classical sliding mode control (CSMC) strategy was implemented to control the finger motion. To overcome the cons of CSMC, such as the chattering problem, an adaptive sliding mode controller (ASMC) was developed.  MATLAB Simuphalange was used to perform the simulation after the necessary equations were derived. …

Effect Of Temperature And Humidity Factors On Water Production Using Solar Energy With Smart Controlling, Ghusoon Aboud, Hashim Hussein, Ali Numan

Engineering and Technology Journal

The aim of the current work is to study the effect of temperature and humidity factors on the production of water from humid air using clean energy, as we have noticed that both factors have an effective impact on the atmospheric air and on the amount of water that was obtained, which is useful in areas that do not have electric power sources or fresh water, and solar energy is used as the main source of energy in open areas. The motivation is to evaluate the performance of the system in light of different air flow rates and in different …

The Effect Of Process Parameters On The Compression Property Of Acrylonitrile Butadiene Styrene Produced By 3d Printer, Sabreen Oudah, Hind Al-Attraqchi, Nassir Nassir

Engineering and Technology Journal

Additive manufacturing (AM) by Fused Deposition Modelling (FDM) provides an innovative manufacturing method for complex geometry components. 3D printers have become easily accessible to the public. The technology used by these 3D printers is Fused Deposition Modelling. The majority of these 3D printers mainly use acrylonitrile butadiene styrene (ABS) to fabricate 3D objects. This study aims to investigate the influence of some printing parameters like infill pattern (Tri-Hexagon, Zig - Zag, and Gyroid), infill density (25%, 50%, and 75%), and layer thickness (0.1, 0.2, and 0.3 mm) on the compressive strength of ABS materials. The design of the experiment was …

The Economic Basis Of Politics, And Related Writings, Charles A. Beard, William Beard

Hannah Arendt Marginalia - All

Call#: JA77 .B4 1957

New York : Vintage Books, 1957.

Contains underlining, marginal lining

PDF Information: 9 pages - 1.8MB