Dielectric strength of solid material

Hello,

I'm new with comsol and i'm using comsol 5.3.1.

I'm trying to test the dielectric rigidity of a solid material (the matierial in my project is PET Polyethylene terephthalate). I don't know how to do that with the phisics of the comsol and i want to ask is that possible with comsol? and if any one have a video or a link that can help me and tolking about dielectric rigidity with comsol please tell me about it.

thank you so much. with all my respect and appreciation