Three dimensional finite element determination of current density and temperature distributions in pillar vias

2002 ◽  
Author(s):  
J.T. Trattles ◽  
A.G. O'Neill ◽  
B.C. Mecrow
Keyword(s):  
Finite Element ◽  
Current Density ◽  
Three Dimensional ◽  
Element Determination ◽  
Temperature Distributions ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Evaluation of Intensity of Singularity at 3D Piezoelectric Bonded Joints Using a Conservative Integral

2015 ◽  
Author(s):  
Chonlada Luangarpa ◽  
Hideo Koguchi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Potential ◽  
Three Dimensional ◽  
Stress Singularity ◽  
Bonded Joints ◽  
Conservative Integral ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

In the present study, a conservative integral based on the Betti reciprocal principle is formulated in order to obtain the intensity of singularity at a vertex of the interface in three-dimensional piezoelectric bi-material bonded joints. To our knowledge, there are few studies on the determination of the intensity of singularity in the three-dimensional piezoelectric bonded joints. In addition, no study on the determination of the intensity of singularity in the 3D piezoelectric bonded joints using the conservative integral has been conducted. Eigenanalysis formulated using a three-dimensional finite element method (FEM) is used to calculate the order of stress singularity, angular variables of mechanical displacements, stresses, electric displacements and electric potential. In order to investigate the influence of an integral area on the accuracy of the results, models with various integral areas are used. The results are compared with those obtained from FEM.

scholarly journals Simulations Of Air Flow Over A Parabolic Antenna

2012 ◽  
Vol 56 (1) ◽  
pp. 81-87
Author(s):  
Liviu Bereteu ◽  
Dorin Simoiu
Keyword(s):  
Finite Element ◽  
Air Flow ◽  
Three Dimensional ◽  
Parabolic Antenna ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

AbstractIn this paper it is present the influence of the wind on a parabolic antenna, in order to study this influence it was made simulations of air flow over a parabolic antenna. The simulations are made with antenna positioned at 90°, 135°. A three – dimensional finite element is simulated for determination of the antenna displacement.

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