Constriction resistance of conducting spots by the boundary element method

Author

Nakamura, Mitsunobu

Author_Institution

Dept. of Electron. Eng., Tamagawa Univ., Tokyo, Japan

Volume

16

Issue

3

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

339

Lastpage

343

Abstract

The finite-element method (FEM) has been applied as a powerful numerical method to the study of electric contacts. In this work, the boundary element method (BEM), is introduced into the study of contacts, and the constriction resistance of conducting spots is computed by the method. The constriction resistance of circular spot is computed, and by comparing the computed value with the exact solution presented by Holm (1979), the high accuracy of the calculated value by the BEM is assured. The constriction resistance of square spot was computed by the FEM, but the value computed by the FEM is a very rough estimation. A far more accurate value is calculated by the BEM. The conductances of ring-shaped spots against the thickness of ring are computed, and it is verified that the conductances do not decrease because of the strong current constriction at conducting spots until the thickness becomes close to zero

Keywords

boundary-elements methods; contact resistance; electrical contacts; boundary element method; circular spot; conducting spots; constriction resistance; electric contacts; ring-shaped spots; thickness of ring; Accuracy; Boundary conditions; Boundary element methods; Conducting materials; Conductivity; Contact resistance; Differential equations; Electric resistance; Finite element methods; Helium;

fLanguage

English

Journal_Title

Components, Hybrids, and Manufacturing Technology, IEEE Transactions on

Publisher

ieee

ISSN

0148-6411

Type

jour

DOI

10.1109/33.232062

Filename

232062