Gurudutt Chandrashekar's blog

Hello all,

I am implementing a Finite Shell element in Abaqus as a User Element.  I have a question regarding the Residual Lod vector that has to be defined in the User Element Subroutine.  

We know that K(du)=R-f       where R is the external force vector at time t+dt

                                                  f is the internal force vector at time t which depends on the present stress state