RHS formulation in UEL

Greetings

I have been writing a UEL for a while now. I have got it running in Abaqus, and as far as I can tell, the stiffness matrix is fine.

I run a single element test. The UEL is an 8-node 3D element.

The loading is a 2 unit displacement on one face. The opposite face is fully fixed. The element size is 2 by 2 by 2 units.

I am trying to write code for the RHS (force vector). I have tried various approaches, but the solution always diverges. Any advice on RHS writing?

Kind Regards

DaVinci

No specific advice but to take small steps and carefully debug your code 😎

-Jorgen