Multiphysics simulation to improve the understanding of Pressure Wave Propagation techniques applied to composite polymers

We used a model based on the finite element method. This method based on scattering of a structure by grid, enabled us to take into account the heterogeneity of the sample. The modelled structure is an electrical insulator sandwiched between two conductive electrodes. This configuration is similar to that used for the measurement of space charge by Pressure Wave Propagation. The sample is modelled by a visco-elastic matrix containing different fillers and space charges distributions. Specific electro mechanical boundary conditions were fixed. This led us to obtain dynamic results, such as the propagation of pressure wave in 2d and the transient of electric displacement due to the principle of induced relative displacement. We selected the resulting ones that could help with the comprehension of the signals generated by these techniques.