Three-Dimensional Finite Element Analysis of a Trial Embankment
Author(s) – Mohammed Yousif Fattah et al.,
Commonly finite element analyses of embankments and excavations are conducted as two-dimensional representations of the true three-dimensional problem, but very little work was done in determining the relative applicability of these solutions until recently, when three-dimensional programs and high-speed computers became available. A trial embankment constructed in Vaasa (Finland) is analyzed in this paper. The main purpose of the construction was the testing and development of the design methods for the planning of road embankments. Settlements at the base level of the embankment were measured with settlement plates, and deeper in the ground with magnetic extensometer. The pore pressures were measured using open and closed piezometer tips installed at different depths. For the task of analysis carried out in this paper, a finite element computer program named (3-DFEP) was written. The program can solve three-dimensional coupled problems. Both the soil solids and the pore water are modeled by 8-noded brick elements. It was found that the results of three-dimensional analysis are more stable than do plane-strain ones. The settlement became approximately constant after about (600) days. The settlement predicted at that time was approximately (400) mm that is in good agreement with the recorded field data while plane-strain results showed continuous increase in settlement after that time.
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Design and Finite Element Analysis of Horizontal Axis Wind Turbine blade
Author(s)-Nitin Tenguria et.al.,
The wind turbine blade is a very important part of the rotor. Extraction of energy from wind depends on the design of blade. In this work a blade of length 38.95m for V82-1.65MW horizontal axis wind turbine (supplied by Vestas) is designed by Glauert’s optimal rotor theory. A computer program is developed for getting the dimension (Twist, chord and thickness). The airfoil taken for the blade is NACA 634–221. The airfoil taken is same from root to tip. The analysis of designed blade is done in flap-wise loading. The spar taken in this work is of square cross-section from root to tip of the blade. The blade and spar are of same composite material. The Finite element analysis of designed blade is done in ANSYS. This work is focused on the two segments of blade, root segment and transition segment. Result obtained from ANSYS is compared with the previously done experimental work.
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Finite Element Analysis of resistance spot welding to study nugget formation
Resistance Spot Welding is being used in the industry for sheet joining process especially in the automobile and aerospace industry. The complicated behavior of this process must be analysed to set the optimum parameters to get the optimum weld quality. This paper presents the FEA simulation of the RSW process. It requires modelling of complex interactions between electrical, thermal, metallurgical and mechanical phenomena. A 2D axisymmetric FEM model has been developed to analyse the transient thermal behaviors of process using ANSYS software and coupled structural-thermoelectric analysis is performed by using advanced coupled field element PLANE223 to simulate the thermal characteristics of RSW process. The objectives of this analysis is to understand physics of the process and to develop a predictive tool reducing the number of experiments for the optimization of welding parameters.
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Finite Element Analysis of column for different gravity load position
Author(s)– Kumawat Yogendra, Pendharkar Umesh
The ABAQUS is finite element analysis software. In the present work finite element analysis of column for different gravity load position is being done. The study is based on the fact that the stress and strain variation depends primarily on load position on column cross section. The present study is aimed to know the variation of principle stress and principle strain i.e. the stress and strain at centroid of elements of column model. The overall objective of this paper is to study variation of stress and strain by different gravity load position.
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