50+ Years of impedance measurement and spectroscopy, and implementation of virtual spectroscopy based on finite element analysis

摘要

Dielectric spectra are usually discussed in the context of simplified circuit theory models. With the availability of numerous ??multiphysics?? programs based on finite element analysis (FEA) which support transient and transient nonlinear FEA, a virtual dielectric spectrometer can be implemented to compute the dielectric spectrum of anything which can be modeled using FEA. This allows comparison of measured dielectric spectra with detailed computational models which mimic the physical systems under study with much greater fidelity than circuit theory models. Once reasonable correspondence between the physical system and finite element model has been established, parameters can be varied in the finite element model to investigate the effect of changes to the physical system without having to formulate the materials of interest.