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A new simulation approach to characterizing the mechanicaland electrical qualities of a connector contact

Published online by Cambridge University Press:  26 January 2010

M. Leidner ,
H. Schmidt ,
M. Myers  and
H. F. Schlaak
M. Leidner*
Affiliation:
Tyco Electronics AMP GmbH, Germany
H. Schmidt
Affiliation:
Tyco Electronics AMP GmbH, Germany
M. Myers
Affiliation:
Tyco Electronics AMP US, USA
H. F. Schlaak
Affiliation:
Darmstadt University of Technology – Institute for Electromechanical Design (EMK), Germany
*
[email protected]
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Abstract

Due to ongoing miniaturization in electronics, connector contact designs have to follow the same trends. The prediction of the mechanical and electrical performance of low force connector contacts becomes increasingly important. This paper shows a new approach for modeling elastic plastic contact between two multi-layered non-conforming rough bodies subjected to pressure and shear traction. Three main considerations will be presented: realistic surface simulations, numerical simulation of contact interfaces, and constriction resistance calculations. (i) Since measured three dimensional (3D) digitized surface data is not always available, having the ability to numerically simulate “realistic” rough surface topographies is of great importance. It will be shown how realistic engineered surfaces can be modeled using five scale independent parameters: RMS roughness, x/y correlation length, kurtosis and skew. (ii) A numerical algorithm has been developed which calculates the stresses and deformations generated in a contact system with up to three different layers per contact partner. The mechanical properties of each individual contact layer are incorporated into the calculation. This numerical algorithm is based on Papkovich-Neuber Potentials, both multi grid and conjugate gradient methods are used, and the plastic deformation of the individual contact points (a-spots) can be interpolated using different material hardening behaviors. (iii) Once the contact interface a-spot distribution is simulated, the constriction resistance of the true contact area can then be calculated. The voltage drop within the contacting bodies is interpolated by iteratively solving the Laplace equation. The electrical properties of all the individual contact layers as well as the interaction between the individual a-spots are taken into account. A validation of these simulation algorithms will be shown using a hard Au/Ni/CuSn6 contact system. The results show excellent agreement between measured and simulated contact resistance results over a normal force range from 1 cN up to 250 cN. The algorithms have been implemented with an “easy to use” Windows software interface called “First Contact”. The software also incorporates a material database that when used together with a surface modeler, allows for the fast calculation and 3D visualization of all mechanical and electrical contact characteristics. 


Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 49 , Issue 2: International Conference on Electrical Contacts (ICEC 2008) , February 2010 , 22909
Copyright
© EDP Sciences, 2009

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References

Hertz, H., J. Reine Angew. Math. 92, 156 (1881)
R. Holm, Electric Contacts, Theory and Application 4 Aufl. (Springer Verlag, 1967/1999)
Miller, S.P. Garvin, The Definition and Rendering of Terrain Maps, in SIGRAPH 1986: Proc. 13th Annual Conf. on Computer Graphics and Interactive Techniques, 1986, Vol. 20, p. 39
Ausloos, M., Berman, D.H., Proc. Roy. Soc. Lond. Ser. A 400, 331 (1985) CrossRef
Hu, Y.Z., Tonder, K., Int. J. Mach. Tools Manufact. 32, 82 (1992) CrossRef
Patir, N., Wear 47, 263 (1978) CrossRef
Liu, S., Wang, Q., Trans. ASME 124, 36 (2002) CrossRef
O'Sullivan, T.C., King, R.B., ASME J. Tribol. 110, 235 (1988) CrossRef
M. Leidner, H. Schmidt, H. Schlaak, Fachtagung Albert Keil-Kontaktseminar, 26–28 Sept. 2007, Universität Karlsruhe, Band 63; see also DVD: Kontaktverhalten und Schalten, Albert-Keil-Kontaktseminar, Karlsruhe, 1972–2009/Electrical Contacts, Proc. Int. Conf. on Electrical Contacts 1961–2007, ISBN 978-3-8007-3189-3
Polonsky, I.A., Keer, L.M., Wear 231, 206 (1999) CrossRef
K.L. Johnson, Contact Mechanics (Cambridge University Press, 1985)
C.H. Venner, A.A. Lubrecht, Multilevel Methods in Lubrication (Elsevier Tribology Series, 2000), Vol. 37
E. Pillipow, Taschenbuch der Elektrotechnik, 1st edn. (VEB Verlag Technik, Berlin, 1976)
Greenwood, J.A., Br. J. Appl. Phys. 17, 1621 (1966) CrossRef
R.D. Malucci, The Impact of Spot Size and Location on Current Density, in Proc. 55th HOLM Conf., 2009, pp. 206–211
M. Myers, M. Leidner, H. Schmidt, H. Schlaak, Extension and Experimental Verification of a New First Contact Method to Model Performance of Multilayer Contact Interfaces, in Proc. 54th HOLM Conf., 2008, pp. 66–73
M. Leidner, M. Myers, H. Schmidt, A numerical method to predict the stick/slip zone of contacting, nonconforming, layered rough surfaces subjected to shear traction, in Proc. 55th HOLM Conf., (2009, pp. 35–40
M. Leidner, Ph.D. thesis, TU Darmstadt, 2009, http://tuprints.ulb.tu-darmstadt.de/1881