Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Ansys

ANSYS-Based Structural Analysis Study of Elevated Spherical Tank Exposed to Earthquake

Mahmoud Saleh Al-Khafaji; Ahlam S. Mohammed; Muna A. Salman

Engineering and Technology Journal, 2021, Volume 39, Issue 6, Pages 870-883
DOI: 10.30684/etj.v39i6.460

Damage of elevated tanks during earthquakes can jeopardize the supply of drinking water and causes significant economic losses. Therefore, seismic analysis of tanks containing liquids requires special consideration. Knowledge of liquid hydrodynamic pressures developed during an earthquake is important for tank design. This paper aims to verify the dynamic reaction of structural systems of spherical elevated steel tanks containing water, and determine the natural frequencies that contribute to the physical response, as well as seismic analysis of the tank. A three dimensional Finite Element Model was developed to identify the main parameters involved in this response for three different fullness ratio (0.00%, 53.30% and 71.11%) using the ANSYS software. The model was implemented and validated based on the results of a previously conducted experimental study. Moreover, it was analyzed under the impact of the most severe earthquake that Iraq was exposed to in 2017 with a magnitude of 7.2 on the Richter scale. The results showed a very good agreement in natural frequency with a discrepancy (root mean square error) of 2% (0.05 Hz), 6.9% (0.15 Hz) and 9.5% (0.2 Hz) for the fullness ratio 0%, 53.3% and 71.11%, respectively In addition, the selected element type and the method of analysis are applicable. Moreover, results of displacement and stresses from earthquake analysis indicated that the spherical tank could lose stability in time 1.4 seconds of the proposed time for the worst part of the earthquake, when displacement records highest values in the direction of earthquake for the tank body at chosen points in the top, middle, and bottom of the tank body which were almost equally at all cases proposed in this study.

Optimum Design of Journal Bearings Dimensions for Rotating Machines

Tariq M. Hammza; Ehab N. Abas; Nassear R. Hmoad

Engineering and Technology Journal, 2020, Volume 38, Issue 10A, Pages 1481-1488
DOI: 10.30684/etj.v38i10A.1093

The values of Many parameters which involve in the design of fluid film journal bearings mainly depend on the bearing applied load when using the conventional design method to design the journal bearings, in this study, as well as applied bearing load, the dynamic response and critical speed have been used to calculate the dimensions of journal bearings. In the field of rotating machine, especially a heavy-duty rotating machines, the critical speed and response are the main parameters that specify bearing dimensions. The bearing aspect ratio (bearing length to bore diameter) and bearing clearance have been determined based on rotor maximum critical speed and minimum response displacement. The analytical solution of rotor Eq. of motion was verified by numerical solution via using ANSYS Mechanical APDL 18.0 and by comparing the numerical solution with the preceding study. The final study results clearly showed that the bearing aspect ratio has little effect on the critical speed, but it has a high effect on the dynamic response also the bearing clearance has little effect on the critical speed and considerable effect on the dynamic response. The study showed that the more accurate values of bearing aspect ratio to make the response of rotor as low as possible are about 0.65 - 1 and bearing percent clearance is about 0.15 - 0.2 for different rotor dimensions.

Fatigue Life and Surface Hardening Investigation of Aluminum Shot Peening Process

Kayser A. Ameen

Engineering and Technology Journal, 2018, Volume 36, Issue 6A, Pages 672-676
DOI: 10.30684/etj.36.6A.12

Two different tests are used in order to analyze the shot peening foraluminum 6061-T6 alloys. Stress amplitude versus fatigue life (S-N curves) are established experimentally using different shot peening ball size (three diameters of balls are used in this paper are 1.5, 3, and 3.5 mm). Also the hardening via Vickers hardnessis evaluated due to shot peening experimentally and by ANSYS software, the three dimensional finite element model of a square plate shot by ball is demonstrates the application of shot peened of hardening surface.The influences of the ball’s diameter on the hardening and S-N curves are studied. The results showed that the fatigue strength is increased when increasing the ball diameter. The higher strength was obtained when using the ball diameter of (3.5 mm) compared to the other diameters (1.5 and 3 mm). Good agreement of hardening results is evident between experimental and Ansys results with average discrepancy 3.6%

Proposed Formulation Using ANSYS for Estimation Axially Strength of Steel Tubes Columns Filled with Concrete

Marwah S. Abdul Gbabar

Engineering and Technology Journal, 2016, Volume 34, Issue 11, Pages 2057-2071
DOI: 10.30684/etj.34.11A.12

In this paper, concrete filled steel tubes columns (CFT) are investigated by using finite element program ANSYS 15.0. Analysis are done for four different shapes of columns (circular, square,hexagonal andoctagonal). Results of analytical solution (for circular and square) were compared with existing experimental data provided by [Alwash et al., 2013].Comparative resultsof failure load give 4% difference between experimental and ANSYS 15.0. Also, parametric studies have been carried out to investigate the effect of concrete filled steel tubes columns shapes (for hexagonal and octagonal) on load carrying capacity.Finally, a newformulaefor predicting the ultimate strength of CFT is proposedbased on experimental data of 148 CFT columns of different cross sections with side length ranging between 200 and 4000 mm. To check the validity of the proposed equation, the loads calculated from the designmethods (American Concrete Institute (ACI 318M-14), Eurocode (EC4),New Zealand Standard of concrete structures(NZS) and American Institute of Steel Construction (AISC)) are used to compare with it. The comparison shows least convergence percentageof the proposed equation.

Finite Element Analysis of Suppression the Vibration of Dish Using Closed Loop Control System

Nahedh Mahmood Ali

Engineering and Technology Journal, 2016, Volume 34, Issue 8, Pages 1499-1513
DOI: 10.30684/etj.34.8A.3

A closed loop simulation is used for minimizing of undemanding vibration caused in the dish system. The finite element method is used to model the closed loop control via ANSYS- APDL. In this paper the Bezier function for surface modeling to get the best modeling points for dish is used. A designed surface is represented by sufficient control points, using these control points, the surface has been represented depending on Bezier technique to generate reliable and near-optimal dish surface. The required equations are generated to apply the surfaces and curves efficiently using MATLAP program, then exported to ANSYS to perform closed loop vibration analysis. It can be concluded that the closed loop control system with gain (Kp=4, Ki=1, Kd=0.1) suppression the vibration of the dish with 98% with different thickness and materials of dish. Also the natural frequencies and the mode shapes of the dish is evaluated. Three materials (pure copper, pure aluminum and steel) each with different thickness is taken for the dish (0.8, 0.9, 1, 1.1 and 1.2) mm and for each thickness the responses and the natural frequencies are determined for six modes. The effect of the thickness’s variation on natural frequencies for each material was studied. It can be observed that natural frequency is direct proportional with the thickness of the dish.

Improving the Strength of Steel Perforated Plate Girders Loaded in Shear Using CFRP laminates

May J. Hamoodi; Waeel Sh.Abdul-Sahib; Ihsan K.Abed

Engineering and Technology Journal, 2015, Volume 33, Issue 9, Pages 2119-2129

The structural behavior of perforated composite web plate girders under shear loading is studied. Five steel plate girders have been tested. Two of them are reference girders, not perforated and perforated. The perforated webs in the three other girders are strengthened with carbon fiber reinforced polymer (CFRP) laminates in different patterns. The diameter of the central circle opening is 300 mm, where is 60% of the web depth. It is found from the experimental work that the ultimate shear load for the perforated composite web plate girder is higher than the reference perforated girder in a range of 100% to 134% depending on the orientation of the fiber in CFRP laminates. Through the experimental results, new formulas are presented to predict the ultimate shear load of perforated strengthened steel girders by CFRP laminates. A nonlinear finite element analysis is carried out for the tested plate girders using the package software program (ANSYS V.14.5). The analytical results contain the distribution of VonMises stresses, which is useful to have a better understanding to the results obtained from the experimental tests.

Numerically and Theoretically Studying of the Upper Composite Complete Prosthetic Denture

Sihama I. Salih; Jawad K. Oleiwi; Qahtan A. Hamad

Engineering and Technology Journal, 2015, Volume 33, Issue 5, Pages 1023-1037

The current study focused on the manufacturing and development properties of upper prosthesis complete denture from composite materials with the basis cold cured resin of poly methyl methacrylate as new fluid resin and reinforced materials by two different types of particles (nano-hydroxyapatite (nHA), micro zirconia (ZrO2)), that added with different volume fractions of (1%, 2% and 3%), and the different types of woven fibers (Glass fiber, Kevlar fiber), it were added with a fixed volume fraction of (5%) to PMMA composites.Specimens’ consist of a six groups where prepared by using (Hand Lay-Up) method from the composites materials and hybrid laminated composites materials. This research includes theoretical and numerical studies by using finite element method to confirming the experimental results of the effect of selected volume fractions of theseparticles and fibers on the (total deformation distribution, equivalent elastic strain and equivalent Von Mises stress) of the composite prosthetic dentures.
The theoretical part included calculations the values of theoretical safety factor and Poisson's ratio. While the numerical part based on finite element method (F.E.M), which was performed by using program (ANSYS-15) to analyze the prepared of denture composite materials and evaluate its characteristics which represent total deformation distribution, equivalent stress and equivalent elastic strain. This was performed by obtaining twenty one models for the PMMA composite dental prostheses which were treated as three dimension structure. The numerical results of the F.E.A showed coincided with some of the experimental results.

Effect of Tunneling in Cohesive Soils on Existing Structures

Ameer Abdullah Ahmed

Engineering and Technology Journal, 2014, Volume 32, Issue 10, Pages 2475-2490
DOI: 10.30684/etj.32.10A.12

The present work is focused on the influence of shallow tunneling on the settlement of existed two storey building supported on different soil properties ranging from medium to stiff clayey soil that having young modules of "50,75 and 100 MPa". Eight locations of the tunnel center "diameter = 4m" were fixed below the building strip footing "width = 2m" at different depths and locations to determine the critical location of the tunnel at each depth.
A total of 24 Finite element CAD "ANSYS" solutions were performed on the eight locations for each of the three types of soil.
The results of the FEM analysis show that the effect of tunneling was to increase the surface settlement and creating differential settlement at the different locations and the critical location of the tunnel was when the tunnel center is located below the center line of the footing at both depths.

Behavior of Corbels Strengthened with Carbon Fiber Reinforced Polymers (CFRP) – Numerical Study

Sameh Badry Tobeia

Engineering and Technology Journal, 2014, Volume 32, Issue 10, Pages 2394-2407
DOI: 10.30684/etj.32.10A.7

In this paper, a numerical modeling performed to study the effect of carbon fiber reinforced polymers (CFRP) as a shear strengthening of corbels. In this study a theoretical simulation is achieved with reinforced concrete corbels, several CFRP strengthening positions has been studied with different shear span – effective depth ratio (a/d) of (0.5,0.6&0.7). The numerical model, by using program (ANSYS 12.1) verified by compare its results with the experimental results. It was found that the position and the amount of (CFRP) as well as the vary of (a/d) ratio, have a great effects on the ultimate load capacity of corbels. Where, the ultimate load capacity increase as the amount of (CFRP) increased in certain positions of corbels, with regards the vary in (a/d) ratio.

Experimental and Finite Element Analysis on Rounded Corners Square Shape Tube Hydroforming Process

Hani Aziz Ameen; Nahedh Mahmood Ali

Engineering and Technology Journal, 2014, Volume 32, Issue 9, Pages 2148-2164
DOI: 10.30684/etj.32.9A4

Tube hydroforming is a forming process where an inner pressure combined with axial feeding deforms the tube to the shape of a die cavity, i.e. the process state where the hardening of the material is unable to resist the increase in inner pressure and wall thickness reduction. In the current work the tube with circular cross section is deformed to square cross section using hydraulic pressure. The die of the square edges is designed and manufacturing to change the tube with circular cross section to square cross section. The die and tools were designed and manufactured in order to satisfy the experimental work.The hydraulic system manufactured is capable to give several values of internal pressure. Initially circular tubes are inflated against a square die while simultaneously they are axially compressed in order to delay wall thinning and burst and achieve an accept tube wall thickness distribution. The dimension of tube used in the experimental work of copper is (L=110 mm, do=9.4 mm , to=1.5mm) to obtain forming limit diagram and mechanical properties of tube and value of the bursting pressure and final thickness for copper tube (170MPa ) and 1.18 mm. A squared grid has been printed by screen method with dimensions (5x5mm) the strain measurement accomplished by measuring the dimensions of the grid printed before and after deformation. The finite element method was applied via ANSYS11software package in order to determine the tube thickness, stress and strain behavior and the internal pressure required to form the square shape tube and the radius of curvature of the tube.It was found that the generated strain during the tube hydroforming process in the square cross – sectional die was less than that in ANSYS software within 20%. The results showed good agreement.

Design and Simulation of 11/0.4 kV Distribution Transformer Using ANSYS

Thamir M. Abdul Wahhab; Methaq Talib Jabbar

Engineering and Technology Journal, 2014, Volume 32, Issue 2, Pages 414-438
DOI: 10.30684/etj.32.2A.10

This work presents a Finite Element Method (FEM) modeling of a 3-phase, 11/0.4 kV, 50 Hz, oil immersed, core (stack) type distribution transformer. In this work The ANSYS package is used to build the finite element model of the transformer, using actual transformer parameters. To investigate transformer performance several analyses are accomplished on this model such as; static analysis, transient analysis, harmonic analysis. Two types of analysis are considered; the linear analysis (using constant permeability) and the nonlinear analysis using the B-H curve of iron. The results are presented in 2D vector and contour colored plots of the FE model, the voltage and current curves, the magnetic flux lines, flux density, field intensity, current density, and magnetic forces.

Punching Shear Resistance of Reinforced Concrete Flat Plate Slabs Strengthened with CFRP

Eyad K. Sayhood; Mohammed J.Hamood; Aseel A. Abdul Ridha

Engineering and Technology Journal, 2014, Volume 32, Issue 2, Pages 511-529
DOI: 10.30684/etj.32.2A.16

The purpose of this study is to present a model suitable for analyzing reinforced concrete (RC) slabs strengthened with Carbon fiber reinforced polymer (CFRP) failing in punching shear using the finite element method. a nonlinear three-dimensional finite element analysis has been used to conduct an analytical investigation on the overall behavior of reinforced concrete slabs strengthened with CFRP strips. ANSYS (version 11, 2007) computer program is utilized.The 8-node isoparametric brick elements in ANSYS are used to represent the concrete, the steel bars and CFRP strips are modeled as axial members discrete within the concrete brick elements by assuming perfect bond between the concrete and steel and between the concrete and CFRP strips. The numerical analysis incorporates material nonlinearity due to concrete cracking in tension, nonlinear stress-strain relations of concrete in compression, crushing of concrete and yielding of steel reinforcement. Also, the evaluation of the CFRP strips enhancement in shear strength of RC slabs is investigated.
Different types of RC slabs strengthened with CFRP strips have been analyzed. Available experimental results are chosen to check the validity and the accuracy of the adopted models. In general, a good agreement is obtained between the finite element and the experimental results. The maximum percentage difference in ultimate load-carrying capacity is 8.83%. Several parametric studies have been carried out to investigate the effects of some important material parameters on the behavior of strengthened RC slabs. These parameters are the concrete compressive strength, the concrete tensile strength, the number of layers of CFRP strips, the configuration of CFRP strips and the effect of diagonal stirrups of CFRP.

Behavior of Steel Plate Girders with Web Openings Loaded in Shear

May J. Hamoodi; Marwa S. Abdul Gabar

Engineering and Technology Journal, 2013, Volume 31, Issue 15, Pages 2982-2996

The structural behavior of three steel plate girders under shear is studied. The first
one is the reference plate girder (G) which is prepared without web openings, and the
second one (GO) is fabricated to contain circular opening at the center of each web panel,
the diameter of the opening is 60% of the web depth, while the third plate girder (GOR)
is with reinforced strip welded around the circular web openings. The aspect ratio of the
panels is one and they all have the same dimensions. The experimental results obtained
from second and third plate girders have been compared with those obtained from the
reference plate girder. The comparison indicates that the reduction in the ultimate shear
load for plate girder with web opening is 51% and for the plate girder with reinforced
web opening is 35%. Also through the experimental results, new formulas are presented
to predict the ultimate shear load of perforated steel girders with large openings.
A nonlinear finite element analysis is carried out for the tested plate girders using the
package software program (ANSYS V.11). The analytical results contain the ultimate
shear capacity and Von Mises stress distribution. The results of finite element models are
compared with results of experimental tests. The difference in ultimate shear load was
10%, 9% and 1.5% for plate girders GO, GOR and G, respectively. Also a parametric
study with varying size of the reinforcement around the web openings is performed by
using the ANSYS program, and it is found that the thickness of the reinforcement strip
has higher effect than its width on the ultimate shear capacity of perforated plate girder.

Finite Element Analysis of the Boom of Crane Loaded Statically

Bakr Noori Khudhur

Engineering and Technology Journal, 2013, Volume 31, Issue 9, Pages 1626-1639
DOI: 10.30684/etj.2013.82179

In this paper, the finite element analysis was carried out on boom of telescopic crane using ANSYS package software and the manual calculation as well as the analysis by the strength of materials procedure. The stress picture along the boom model was conducted under the maximum load carrying capacity. The stress developed at the interception of hydraulic rod with the first tube is higher than that developed along the rest of the boom. Moreover, the maximum deflection occurs at the boom head sheave.
In order to investigate the accuracy of the results, a comparison between the two approaches and the exact obtained by the strength of materials procedure is carried out.
Although the high capabilities of ANSYS software, the results are somewhat less accurate than that obtained by the manual calculations. Besides that, the results obtained by the finite element manual calculations are wholly similar to that of strength of materials procedure. Model taken for this paper is TADANO TR-350 XL 35-ton capacity.

Deformation Analysis of Road Embankment Foundation Soil Improved with Fiber Glass

Zainab Ahmed Alkaisi; Zena Hadi Alqaissi; Najwa Wasif Jassim

Engineering and Technology Journal, 2012, Volume 30, Issue 19, Pages 3341-3361

The main objective of this research is to evaluate the improvement of embankment
soil foundation soil using the fiber glass treatment. To accomplish the main objective,
laboratory tests, includes direct shear test and unconfined compression test are made to
evaluate the potential of acting the fiber glass as cementing agent in terms of strength
parameters (cohesion and angle of internal friction). The ANSYS program of version
(12.1) was employed for analyzing embankment foundation system. The results
showed that increasing the percent of fiber glass from (1 to 3%) reduce the vertical and
horizontal displacement about (75%) at 3%, and reduced the horizontal and vertical
strain about (75%, 85%) respectively at the same fiber glass content (3%). This means,
that the general role of adding the fiber glass works as a tender to soil mixture not as
fiber reinforcement. So it can be concluded that the fiber glass act as cementing agent
as shown in the obtained experimental results for strength parameters (cohesion and
angle of internal friction ) from the direct shear and the unconfined compression test
that carried out in this works.

Experimental and Numerical Study of the Effects Of Creating Openings in Existing RC Beams and StrengtheningWith CFRP

Hayder Qais Majeed

Engineering and Technology Journal, 2012, Volume 30, Issue 15, Pages 2550-2561

This study presents an experimental and nonlinear finite element analysis of creating square openings in existing RC beams and strengthening with CFRP laminate. Flexural strengthening of reinforced concrete beams is now becoming more and more important in the field of structural maintenance and retrofitting. In the experimental programming, three RC beams were cast. Two beams were tested in the un-strengthened condition the first act as the solid Control beam, and the other have openings, the third one have opening and strengthening with CFRP laminate. The beams were also modeled using a FEM packaged (ANSYS 11). The results indicate that the strengthened beam recorded the highest failure load and its mode of failure was ductile. The numerical results seemed to be able to predict the behavior of the beams.

Influence of the Butt Joint Design of TIG Welding on the Thermal Stresses

Hani Aziz Ameen; Khairia Salman Hassan; Muwafaq Mehdi Salah

Engineering and Technology Journal, 2011, Volume 29, Issue 14, Pages 2841-2858

The aim of this paper is to demonstrate the influence of the single butt joint design of TIG welding on the thermal stresses for carbon steel type St-37. The butt welding was performed by V angles 30°,45°,60° and 90° and the thermal stresses analysis is based on the local moving heat flux. The numerical model developed by ANSYS12
software based on solving the three dimensional energy equation, considering moving heat source and temperature dependent material properties. Temperature and stresses distributions were obtained function of time. From the results, it is evident that the
joint design has an important role in the welding process, when the edge angle of the welding region gets bigger, the faults get less due to increase of heat flux in the welding region. It can be concluded that the specimen with less than 6mm thickness can be welded without edge angle preparation, due to increase the thermal stresses
when edge angle is evident and higher thermal stresses distribution was at edge angle 60° and lowest thermal stresses distribution was at 90°.

Sphrical Slab with Ferrocement

a A. Mohammed; Shayma

Engineering and Technology Journal, 2011, Volume 29, Issue 13, Pages 2609-2616

This research is devoted to investigate the behavior of spherical ferrocement slabs under flexural loading. The main parameters considered in the analysis are the thickness of the slab, vertical and horizontal diameters, and the effect of number of wire mesh layers on the behavior of spherical. Analysis was done using the finite element software ANSYS V. 11, which is used for solving several problems of structural engineering. The 8-node iso-parametric brick elements in ANSYS are used to represent the mortar, the wire mesh layers are
considered as smeared layers elastic-perfectly plastic materials embedded within the
brick elements by assuming perfect bond between the mortar and steel.
An improvement was indicated in the behavior of the elements when changing the shape of the slab from straight to spherical slabs found in deflection about 64% (as indicated in ref. [1]). As well as increasing number of wire mesh layers from two to four and from two to six tend to increase the load capacity by 18% and 28% respectively.
The increase in the thickness and the vertical diameter cause decrease in deflection to 20% and 10% alternately.

Influence of Metal Type on the Deep Drawing Force by Experimental and Finite Element Method

Moneer H. Al-Saadi; Hani Aziz Ameen; Rawa Hamed M. Al-Kalali

Engineering and Technology Journal, 2011, Volume 29, Issue 13, Pages 2601-2608

This paper is aimed to study the effect of material type on the drawing force. Three metals are used (low carbon steel 1008 AISI, Austenitic stainless steel 304 AISI, and pure aluminum 1100), as a sheet with thickness of 0.5mm for each one, and they were cutting as a blank with 80 mm diameter, then drawn in a die with 44mm diameter to produce cup. To predict the deep drawing force by finite element method, Hill's yield criteria is used, which examines the effect of anisotropy. Two dimension axisymmetry model of deep drawing were built and analyzed by ANSYS FEM code. The results show that the drawing force for stainless steel is higher than the other two metals due to the difference in metallurgical structure. The numerical results were compared with the experimental; good agreement was found between finite element and experimental results.

Investigation of the Behavior for Reinforced Concrete Beam Using Non-Linear Three-Dimensional Finite Elements Model

Israa Kh. AL-Shimmari; Nagham T.Hamad; Waleed A Waryosh

Engineering and Technology Journal, 2011, Volume 29, Issue 10, Pages 1870-1885

This study presents theoretical investigation that reinforced concrete and composite construction might be suitably combined to give a new structural material: composite reinforced concrete. To study theoretically the composite beam, nonlinear three-dimensional finite elements have been used to analyze the tested beam.
The 8-node brick elements in (ANSYS) are used to represent the concrete, the steel bars are modeled as discrete axial members connected with concrete elements at shared nodes assuming perfect bond between the concrete and the steel. The results obtained by finite element solution showed good agreement with experimental results.

Development of Three - Layer Composite Steel - Concrete - Steel Beam Element with Applications

Jamal A. Farhan; Hussain M. Hussain

Engineering and Technology Journal, 2010, Volume 28, Issue 24, Pages 6970-6985

In this study, a general linear one-dimensional finite element beam model is developed for the analysis of the three layer composite steel- concrete- steel beams which are a special case of the multi-layer
Connectors, concrete layer thickness, plate thickness, type of loading and concrete compressive strength composite beams. The model is based on partial interaction theory of composite beams where the flexibility of shear connectors is allowed. A program is constructed using VISUAL BASIC language to analyze this type of beams. Numerical applications are presented to demonstrate the validity and applicability of the present method. A parametric study is carried out to demonstrate the effect of some parameters including the variation of shear stiffness of shear on the behaviour of three-layer composite beams. The results of
the proposed programmed model shows a good agreement with those obtained by finite elements method using ANSYS program (Release 11, 2007. The models used in ANSYS program are shell element, brick element and combine element to simulate the behaviour of steel plates, concrete part and shear connectors respectively

Effect of the Number of Horizontal Construction Joints In Reinforced Concrete Beams

Maha Ghalib Ghaddar; Layla Ali Ghaleb; Qais Abdul-Majeed

Engineering and Technology Journal, 2010, Volume 28, Issue 19, Pages 5803-5821

In this paper some results from previous experimental test are adopted
and analyzed using a nonlinear three-dimensional finite element ANSYS
computer program (v.11) to investigate the effect of the presence of
horizontal construction joints (H.C.J.) on the behavior of reinforced
concrete (RC) beams.
Three beams having one, two and three (H.C.J.) that divide the beam into equal
parts, as well as one reference beam without a joint were analyzed. The results
obtained from the finite element analysis show very good agreement with the
results obtained from the previous experimental test. The maximum differences in
ultimate loads were about (8.2-10.4)% for all types of tested beams. The presence
of one, two and three (H.C.J.) in RC beams under flexure gave a decrease in the
value of the cracking load such that Pcr was (97%), (85%) and (80%) of (Bref).
The respective ultimate load capacity Pu was (96%), (89%) and (84%) compared
to (Bref).

Stability of Al-Hadba minaret a-parametric study

Engineering and Technology Journal, 2010, Volume 28, Issue 19, Pages 968-981

Al-Hadba minaret in MOSUL City is one of the famous and oldest Islamic
monuments in the city. This minaret suffers from cracks in different places and
partial collapse in the outer stairs and in the upper dome. In addition to that, the
minaret is suffering from leaning. In this research the stability analysis,
displacement, and stress distribution were investigated using ANSYS 11 program
to represent the effect of external loads, and loads from maintenance work. In the
analysis the minaret and its foundation were considered as a one unit. Further
more, the effect of changing the nature of surrounding soil was investigated.
Results showed that the underground soil around the foundation is fill and
very loose material containing high percent of organic material and cavities. This
formation is extend down to (4.3-9.8 m) below the ground surface and have no
pronounce effect on the stability of the minaret .The analysis showed that the maximum compressive stress at the base of minaret in the inclination direction of
the minaret, where the opposite direction is under tension and the highest value
was at the base of cylindrical part.

Finite Element Analysis of Single Sided Linear Induction Motor

Adil H. Ahmad; Mehdi F. Bonneya

Engineering and Technology Journal, 2010, Volume 28, Issue 15, Pages 5113-5123

This paper presents analysis and operation of linear induction motor (LIM) using finite element method (FEM). The solution of magnetic field problem is performed for both two and three dimensional approaches. Magnetic vector potential, flux density, field intensity, induced rotor current, and propulsion force are computed for LIM model studied. The effect of velocity is taken into consideration. The primary winding self and mutual inductances are computed for three dimensional analysis.

Evaluation of Transverse Construction Joints of Reinforced Concrete Beams

Qais Abdul-Majeed

Engineering and Technology Journal, 2010, Volume 28, Issue 14, Pages 4750-4773

Construction joints are stopping places in the process of placing concrete, and they are required because in many structures it is impractical to place concrete in one continuous operation. The amount of concrete that can be placed at one time is governed by batching and mixing capacity and by the strength of the formwork. A good construction joint should provide adequate flexural and shear continuity through the interface. In this study, available experimental tests were analyzed by using a nonlinear three-dimensional finite element ANSYS computer program (v. 9). In addition an interface model was proposed for the transverse construction joints.
Six beams with different transverse construction joints at mid-span as well as to one reference beam without joint are analyzed. The reliability of the model is demonstrated by comparison with the experiment and alternative numerical analysis which shows 5-7% difference.

FEM-Simulation of Single and Multi Layered Induction Heating Systems

Mohammed Moanes Ezzaldean Ali; Hanan A. R. Akkar; A. K. M. AL-Shaikhli

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 2245-2262

Induction heating system has a number of inherent benefits compared to
traditional heating systems. Many analytical and numerical approaches have been applied to solve the problem of induction heating; efforts are made to introduce new development in computational approaches and utilization of newly developed specialized software packages to improve the methods of analysis and design of induction heating systems. This paper includes the description of the steps used for developing a general and comprehensive program, which works under ANSYS 11.0SP1 package environment. This program can be applied to analyze a wide
range of induction heating applications according to finite element method. Analysis approach is extended to deal with induction heating systems with magnetic material workpieces by introducing the multiregion method. Results of analysis the induction heating systems, by using ANSYS package, include all the electromagnetic and thermal quantities related to the induction heating process. To approve the simulation, used in this work, the results were compared with
published practical measurements, a good agreement was achieved.

Effect of Dual Reinforcement on Wear Resistance by Aluminum Compacts Reinforce by SiC, Al2O3

Mohammed Moanes Ezzaldean Ali; Hanan A. R. Akkar; A. K. M. AL-Shaikhli; Ali K. Shayyish; Muhsin J. Jweeg; Wisam Auday Hussain; Mohammed T. Hussein; Mohammad A. Al-Neami; Farah S. Al-Jabary; Jafar M. Hassan; Ali H. Tarrad; Mohammed N. Abdullah; Ahmed T. Mahdi; Eyad K. Sayhood; Husain M. Husain; Nidaa F. Hassan; Rehab F. Hassan; Akbas E. Ali; Assim H Yousif; Kassim K Abbas; Aqeel M Jary; Shakir A. Salih; Ali T. Jasim; Ammar A. Ali; Hosham Salim; JafarM. Daif; Ali H. Al Aboodi; Ammar S. Dawood; Sarmad A. Abbas; Salah Mahdi Saleh; Roshen T. Ahmed; Aseel B. Al-Zubaidi; Mohammed Y. Hassan; Majid A. Oleiwi; Shaimaa Mahmood Mahdy; Husain M. Husain; Mohammed J. Hamood; Shaima; a Tariq Sakin

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 423-429

The producing composite materials of dual reinforcement in which the matrix material is aluminum reinforced with two types of ceramic particles : which are Alumina (50μm


composite materials; wear test ; Al2O3; SiC: Al

Finite Element Analysis Up To Failure Of Composite Concrete – Corrugated Steel Cylindrical Shells

Ahmed T. Mahdi; Eyad K. Sayhood; Husain M. Husain

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 2339-2351

This study presents three-dimensional finite element analysis to the behavior of composite concrete-corrugated steel cylindrical shell. This type of construction utilizes the advantages of both of ordinary reinforced concrete and the composite action of cylindrical shell with corrugated steel plates. The 8-node brick elements in (ANSYS v.9.0) have been used to represent the concrete, while the steel bars
are modeled as discrete axial members connected with concrete elements at shared nodes with the assumption of prefect bond between the concrete and the steel bars. The corrugated steel plate is modeled by four-node shell elements. The interface elements are modeled by using three-dimensional surface to surface contact elements connected with the nodes of concrete and steel channel elements. Comparison is made between the results obtained from the finite element analysis and the available experimental results of previous studies

Behavior of Composite Steel-Concrete Beam Subjected To Negative Bending

Husain M. Husain; Qais Abdul-Majeed; Anas H. Yousifany; Ikbal N. Korkess

Engineering and Technology Journal, 2009, Volume 27, Issue 1, Pages 53-71

This work deals with the behavior of structural continuous composite steelconcrete
beams, which are widely used in building and bridge constructions. Therefore
the structural behavior of composite beams under negative moment is a significant
subject. However experimental tests in this field are very rare and information about the
efficiency of shear connection when the slab is under tension are really few.
In the present research, available experimental tests on composite steel-concrete
beams under negative bending are theoretically analyzed using the finite element
software ANSYS. ANSYS computer program is a large-scale multipurpose finite
element program which may be used for solving several cases of engineering analyses.
The proposed three dimensional model is able to simulate the overall flexural
behavior of composite beams. This covers; load-deflection behavior, longitudinal slip at
the steel-concrete interface, and distribution of shear studs. The reliability of the model
is demonstrated by comparison with available experiment and alternative numerical
analysis which shows 9-10% difference.