On the Electric Contact Resistance
B. N. J. Persson
Abstract
Abstract When an electric current flow across an interface between two contacting solids a change in the electric potential occur over the interface. One part of the electric contact resistance is due to the constrictions at asperity contact regions. Barber has shown that the constriction resistance can be related to the interfacial contact stiffness. I discuss the relation between the classical (approximate) Holm theory for the constriction resistance and the (exact) theory involving the contact stiffness. Graphical Abstract
Topics & Concepts
Contact resistanceMaterials scienceStiffnessAsperity (geotechnical engineering)ConstrictionElectrical contactsElectrical resistance and conductanceMechanicsContact theoryElectric currentComposite materialStructural engineeringElectrical engineeringPhysicsEngineeringLayer (electronics)EndocrinologyMedicineForce Microscopy Techniques and ApplicationsAdhesion, Friction, and Surface InteractionsElectrical Contact Performance and Analysis