Dynamic Stresses and Displacements Around Cylindrical Cavities of Arbitrary Shape

1984 ◽  
Vol 51 (4) ◽  
pp. 798-803 ◽  
Author(s):  
S. K. Datta ◽  
K. C. Wong ◽  
A. H. Shah
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Multiple Scattering ◽  
Circular Hole ◽  
Arbitrary Shape ◽  
Numerical Technique ◽  
The Finite Element Method ◽  
Dynamic Stresses ◽  
Cylindrical Holes ◽  
Cylindrical Cavities

Dynamic stresses and displacements around cylindrical cavities of various shapes, namely, circular, triangular, and square cavities are presented in this paper. Also presented are results for a pair of circular cavities of equal radii and a pair of circular and square cavities. These results are of interest in estimating the effects of corners and multiple scattering on the distribution of dynamic displacements and stresses around cylindrical holes or openings. Since exact analytical solutios are not available in these cases (except for a single circular hole) a numerical technique combining the finite element method (FEM) and the method of eigenfunction expansions is used here.

Buckling analysis of plates of arbitrary shape

1984 ◽  
Vol 26 (1) ◽  
pp. 77-91 ◽  
Author(s):  
D. Bucco ◽  
J. Mazumdar
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Arbitrary Shape ◽  
Numerical Technique ◽  
Buckling Analysis ◽  
Contour Method ◽  
Elastic Plates ◽  
Standard Finite Element Method ◽  
Thin Elastic Plates ◽  
Element Method

AbstractA simple and efficient numerical technique for the buckling analysis of thin elastic plates of arbitrary shape is proposed. The approach is based upon the combination of the standard Finite Element Method with the constant deflection contour method. Several representative plate problems of irregular boundaries are treated and where possible, the obtained results are validated against corresponding results in the literature.

Fundamental Study on Contact Behavior of Ultrasonic Motor

2005 ◽  
Author(s):  
Daichi Nakajima ◽  
Tomoyuki Ozawa ◽  
Takeshi Maeda ◽  
Michio Tsukui ◽  
Kohro Takatsuka ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Energy Efficiency ◽  
Finite Element ◽  
Frictional Force ◽  
Numerical Technique ◽  
Ultrasonic Motor ◽  
The Finite Element Method ◽  
Fundamental Study ◽  
Contact Behavior ◽  
Lining Material

We discuss the contact behavior between the stator and the lining material that sticks to the rotor of an ultrasonic motor. The ultrasonic motor is powered by the vibration of the stator and operates with a frictional force between the stator and the lining material. Therefore, it is important to examine the mechanism of the contact behavior to improve the energy efficiency and durability of the ultrasonic motor. We propose a numerical technique using the finite element method to examine the contact behavior between the stator and the lining material. Then, we compare the numerical example with the theoretical solution proposed by L. A. Galin and confirm the validity of our technique. Moreover, on the basis of incremental theory, we use our technique to numerically examine the complex contact behavior of the non-contact zone, slip zone and stick zone in a non-rotating rotor.

Durability Evaluations of the Car Body for Rubber-Tired Light Rail Vehicles

2006 ◽  
Vol 321-323 ◽  
pp. 1487-1490
Author(s):  
Yeon Su Kim ◽  
Rag Gyo Jeong ◽  
Tae Kon Lim ◽  
Won Ju Hwang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Experimental Results ◽  
Strain Gauges ◽  
Light Rail ◽  
The Finite Element Method ◽  
Dynamic Stresses ◽  
Test Track ◽  
Car Body ◽  
Rail Vehicles

This study was aimed at evaluating the durability of the car body for rubber-tired light rail vehicles according to Korean-standardized specifications for light rail vehicles (size, strength, structure, weight, etc.). The strengths of the car body were analyzed under two weight conditions (tare weight and maximum passenger weight) by using the finite element method. Based on the results of the analysis, dynamic stresses were measured by using strain gauges, including rosette gauges, while the train was running on the test track. Various experimental results have verified the durability and safety of the car body.

New Boundary Treatment in the Finite Element Model Using the Shallow Water Equation

2012 ◽  
Vol 446-449 ◽  
pp. 2694-2698
Author(s):  
Tae Hwa Jung
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Complex Geometry ◽  
Numerical Technique ◽  
Shallow Water Equation ◽  
Element Model ◽  
The Finite Element Method ◽  
Boundary Treatment ◽  
The Finite Element Model ◽  
Element Method

Effective numerical technique for treatment of inclined boundary in the finite element method was introduced. Finite element method was frequently used to analyze hydraulic phenomena in the coastal zone because it can be applied to irregular and complex geometry. In this study, we introduced the way to treat the boundary condition over an inclined bottom.

On Displacement Fields in Orthotropic Laminates Containing an Elliptical Hole

2000 ◽  
Vol 67 (3) ◽  
pp. 527-539 ◽  
Author(s):  
S. M. Chern ◽  
M. E. Tuttle
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Rigid Body ◽  
Circular Hole ◽  
Orthotropic Plate ◽  
Elliptical Hole ◽  
The Finite Element Method ◽  
Displacement Fields ◽  
Orthotropic Composite ◽  
Moiré Techniques

The classical Savin solution for the stress induced in an orthotropic plate containing an elliptical hole places no restrictions on remote rigid-body rotations. In this paper the Savin procedure is used to obtain a solution for which remote rigid-body rotations are required to be zero. The validity of these new results is demonstrated by comparing predicted displacement fields near a circular hole in specially orthotropic composite panels with those measured using moire´ techniques as well as those predicted using the finite element method. [S0021-8936(00)01303-9]

Reduction of stress concentration around a hole in a uniaxially loaded plate

1983 ◽  
Vol 18 (2) ◽  
pp. 135-141 ◽  
Author(s):  
U C Jindal
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Concentration ◽  
Circular Hole ◽  
High Order ◽  
Two Dimensional ◽  
The Finite Element Method ◽  
Loaded Plate ◽  
Hole Geometry ◽  
Element Method

The stress concentration around a circular hole in a plate can be reduced by up to 21 per cent by introducing auxiliary holes on either side of the original hole. But this approach of auxiliary holes creates two more regions of stress concentration in the plate. In the present study, the hole geometry has been modified to effect stress reductions as high as 22 per cent. The problem has been analysed numerically by the finite element method and experimentally by two-dimensional photoelasticity. It has been observed that by making the hole oblong in the direction of loading, a high order of reduction in stress concentration around the hole can be obtained.

scholarly journals Nonlinear Dynamic Analysis of Axisymmetric Solids by the Finite Element Method

1974 ◽  
Vol 96 (2) ◽  
pp. 103-112 ◽  
Author(s):  
M. Hartzman
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Technique ◽  
Nonlinear Dynamic Analysis ◽  
Plastic Behavior ◽  
The Finite Element Method ◽  
Lumped Mass ◽  
Mass System ◽  
The Impact ◽  
Element Method

A method for calculating the dynamic response of deformable axisymmetric solids, subjected to time-dependent axisymmetric loads is described. The nonlinearities considered in this analysis include material nonlinearity (elastic-plastic behavior) and geometric nonlinearity, which includes finite deformation. The finite-element method is applied to approximate the continuum by a lumped-mass system connected by axisymmetric elements. The equations of motion are solved by applying a step-by-step numerical technique. The analysis is illustrated by application to the collapse of a built-in spherical dome with varying thickness and to the impact of a cylinder against a rigid wall. Close agreement is obtained between the results from the present technique and results obtained from the literature.

Structural Safety Evaluations of Bogie Frames for Rubber-Tired AGT Vehichles

2006 ◽  
Vol 321-323 ◽  
pp. 1491-1494
Author(s):  
Yeon Su Kim ◽  
Sung Hyuk Park ◽  
Rag Gyo Jeong ◽  
Tae Kon Lim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Experimental Results ◽  
Structural Safety ◽  
The Finite Element Method ◽  
Dynamic Stresses ◽  
Test Track ◽  
Element Method

This study was aimed at evaluating the structural safety of the new bogie frames for Korean-standardized rubber-tired AGT vehicles. The guidance frame and the rotation frame were designed according to Korean-standardized specifications for rubber-tired AGT vehicles, and their stresses were analyzed by using the finite element method. Based on the results of the analysis, dynamic stresses were measured while the train was running under various conditions in the test track. Analytical and experimental results verified the structural safety of the new bogie frames.

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