Dear MEMS society, Does anyone know the critical damping ratio of Silicon(Si) at a specific frequency? I'm trying to perform a transient analysis of a silicon beam subjected to various forces in FEMLAB. The damping is modeled using Rayleigh damping parameters with damping coefficients proportional to the mass and stiffness. To find the Rayleigh proportional-constants I need the critical damping ratio of Silicon. Any help would be greatly appreciated! Kind regards, Aksel Andreas Transeth Norwegian University of Science and Technology - Norway