Hello Helen,

I can't answer your question, but I have some questions for you. Are you trying to switch materials in the middle of the simulation? Why do you need to switch from a linear material to a nonlinear material during the simulation? Why not begin the simulation with the nonlinear material?

I have used temperature dependent properties for a material. That single material definition then works over a wide temperature range and Ansys automatically interpolates the correct value from the table at each time step in the simulation.