Evaluation The Efficiency of a Suggested Model in Emulation The Behavior of R.C. Beams Strengthened with GFRP Strips

Our Paper is a laboratory modeling research to evaluate the efficiency of finite element model in emulation the behavior of R.C. beams with shear deficiencies (ultimate load, mechanism of cracking and failure, load-deflection behavior) strengthened with GFRP strips. We tested nine R.C. beams 200x30x16 cm in three groups, the first consists of three R.C.beams for comparing, the second consists of three strengthened R.C. beams with two sides vertical GFRP strips, and the third also consists of three strengthened R.C. beams with two sides inclined (45°) GFRP strips. We modeled these beams by advanced finite element program Ansys10, and we get results agreed with our laboratory study.

Modeling and Simulation of Electromagnetic Fields in Three-Phase Induction Motors Using ANSYS Software

The study of electromagnetism in electrical machines is critical, especially in the field of design, investment and optimal performance. To achieve this, there are many ways in which varying degrees of accuracy . The main aim of this piece of research is to study electromagnetic fields distribution in 3ph-induction machines using computational numerical methods and proper software, because these fields form the basic principle in machine 's work. It has been used the finite element method aided computer to solve magnetic equations (Maxwell equations). The simulation of magnetic field in induction machine performed by ANSYS-software. The paper shows technique for finding the electromagnetic fields distribution in all parts inside 3phinduction machine to get optimal design.

High Nonlinear Photonic Crystal Fibers (PCF) Design with Very Low Confinement Loss

A Photonic Crystal Fiber (PCF) is a special class of optical fibers which is made of a single material and having air holes in the cladding. This paper studies and compares the optical characteristics such as effective area, confinement loss and nonlinearity, among three different PCF's structures: Hexagonal PCF (HPCF), Octagonal PCF (O-PCF) and Decagonal PCF (D-PCF) with varied structural parameters (number of the air-holes rings, the air-hole's diameter, and the lattice constant), and the target is to use the fiber in a Raman amplifier. Proposed structures are simulated by using COMSOL MULTIPHYSICS which depends on Finite Element Method (FEM). The numerically simulated results shows that Decagonal PCF (D-PCF) offers lower confinement loss, lower effective area, and larger value of nonlinearity than the other two structures. It is seen that Decagonal PCF(D-PCF) is suitable for long transmission fiber applications.

Geometrical Nonlinear Analysis Based on 2th order theory of two and three dimensional Framed Structure Using a Modified Finite Element Method

In this work, a modified finite element displacement approach is used to analyze two and three dimensional Framed Structure. The element is based on second order theory.

The study of the electromagnetic field distribution in a 20/0.4kV distribution transformer using the finite element method

This research presents a study of distribution of the electromagnetic fields in three-phase distribution transformer 200kVA-20/0.4kV through the conclusion of the governing electromagnetic equation and solve it using finite element method by FEMM4.2 program.

Using Matlab/pdetool to Calculate Electrical Field of High Voltage Insulators

The aim of this study is to calculate the electrical field (EF) of some types of high voltage insulators by using numerical methods. There are different methods, which are used to do this, finite element is the most important one. It is possible to find EF in 2D or 3D systems by using Matlab/pdetool, which distinguishes with big capabilities in calculation and view the results, additionally, it is available, cheap and can save time and money for doing this important calculations in high voltage applications .

Comparing analysis for modeling liquid in elevated water tank

. In this research, a study of a model of reinforced concrete elevated water tank, with capacity of 900 cubic meters, supported with frame system is carried out using finite element method (FEM). The liquid mass contained in the container is modeled as the sum of two separated messes i.e. impulse mass and convective mass following the recommendations of Eurocode 8 , 2006, for cases full container. The second ones Gareane2011 method . The soil is modeled using (FEM) with energy absorbent boundaries (dampers) to prevent the combination of earthquakes waves.

Testing the Numerical Simulation Of The Behavior Of RC Frame With Damaged Plasticity Model

This study aims to investigate the capacity of numerical models to reproduce the monotonic behavior of reinforced concrete framed structures.

Finite element and boundary element approaches in magnetostatic problems

In this paper, the simple magnetostatic field is found by means of FEM and also BEM . The aim of this reseach is to find the simple magnetostatic field for any magnetic problem because it is contributed in effective magnetic field for this problem beside the other terms as :the exchange field , anisotropic field and external field.We found that the boundary element method is much more convenient to apply .

Numerical study of the use of Non-destructive Impact Test methods for the exam of integrity of concrete piles

This research includes a numerical study using Finite Element Method aims to evaluate the ability and accuracy of using Non-destructive Impact Response Method in the assessment of length and cross-sections of intact concrete pile (not deformed) in both time and frequency domains. Therefore, an appropriate numerical model depends on the modeling of both impact force (impulsive load) and distributing medium (pile + soil) and insert them in computing software ABAQUS was carried out. The numerical model was verified corresponding to field measures obtained from literature review and the results showed good agreement between measures and numerical results. Furthermore, the model was applied on a typical example in order to study vibration distribution in the pile due to impulsive load applied on pile top. Mechanical response curve of intact pile was obtained. Then, both of length and cross-section area of the pile were determined. Finally, parametrical study of most important factors (stiffness of soil surrounding the pile and length of pile embedded in the soil) effect on vibration distribution resulted from impulsive load applied on pile top. The parametrical study was carried out in two domains; first one was time domain depending on the direct analysis of particle displacement and velocity and the second was frequency domain depending on analysis of pile mechanical response curve. The results of this research enables to use the proposed numerical model to numerically obtain the time history of particle displacement and velocity in addition to the curve of mechanical response computed in the pile top and forms reference diagrams which is used later to compare with similar diagrams resulted from field test of executed piles. As a result, pile integrity test and detecting of defects in the piles if any. In addition, the limits of the use of both analysis methods adapted in research and choose the best between them according to the case study.