Temperature and Yield Stress Characterization of Electric Contacts By 3D Numerical Simulation

Abstract

Electric contacts of riveted type are analyzed by 3D simulation of their mechanical, electrical and thermal characteristics. Special emphasis was put on dependencies of contacts’ temperatures on chosen contact material and applied load conditions. Mechanical characteristics of contacts are considered through yield stress distributions and their maximum value dependences on contact material, geometry and dimensions. All simulations are performed for contacts within switching device, i.e. together with suitable supporting structure. Results are discussed on the basis of appropriate contact material selection and determination of reliable operating time for different geometry, dimensions and imposed loading conditions of contacts.