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→6.4.2 Contact Physics – Formulas
===6.4.2 Contact Physics – Formulas===
*'''Constriction resistance''' <br />Re = D/2a
(Single spot contact according to Holm; circular touching spot between clean
contact surfaces)
*'''Path resistance''' <br />Rd = Rb + RK
*'''Contact resistance and contact force'''<br />R = 280D ³ E(F · r) K K
(According to Holm model for film-free spherical contact surfaces with plastic
deformation of the contact material; F < 1 N for typical contact materials) k
