how many element tags do I need to define a Two Node Link Element?

[MikeITExpert]

I am new to OpenSees and I am trying to define a Two Node Link Element.

My physics knowledge dates back to Halliday physics course back in university. I am just curious how many material tags do I need in order to define a Two Node Link Element and what they are representing.

Much appreciate your comments.
Regards

https://opensees.berkeley.edu/wiki/inde ... nk_Element