Variable resistivity: spline approximation


This model defines a conductive isotropic material by its resistivity (variable resistivity). The non linear J(E) electric behavior law is defined from pairs of experimental J, E values.

Mathematical model

The model is constructed in the following manner:

  • entry of experimental J, E values
  • interpolation by a spline function

The shape of the J(E) curve is given in the figure below.

Anisotropic material

This model is not available for an anisotropic material.