Numerical Computation of Surface Melting at Imperfect Electrical Contact between Rough Surfaces

This paper presents a surface melting model by means of numerical simulation of three-dimensional imperfect electrical contact (ImPEC) between rough surfaces in a high electrical current application. The continuous convolution and fast Fourier transform (CC-FFT) and discrete convolution and fast Fou...

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Bibliographic Details
Main Authors: Kim, Wansik, Wang, Q. Jane
Format: Conference Proceeding
Language:English
Subjects:
asperity melting heights and speeds
CC-FFT
Contacts
Convolution
DC-FFT
Electrons
Fast Fourier transforms
Gradient methods
Heating
ImPEC
Numerical simulation
Rough surfaces
surface melting
Surface roughness
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Summary:This paper presents a surface melting model by means of numerical simulation of three-dimensional imperfect electrical contact (ImPEC) between rough surfaces in a high electrical current application. The continuous convolution and fast Fourier transform (CC-FFT) and discrete convolution and fast Fourier transform (DC-FFT) algorithms with the conjugated gradient method (CGM) for pressure iteration are applied to solve the surface melting problem under thermo-electro-mechanically coupled ImPEC conditions. The computational result suggests that asperity melting by Joule heating of electron tunneling through a surface oxide film layer may be initiated in a very short time interval if the apparent current density is extremely high. Averaged asperity melting speeds at molten contact asperities are also predicted by means of simulated asperity melting heights.
ISSN:1062-6808
2158-9992
DOI:10.1109/HOLM.2006.284069