Topic: Nonlinear beam model
We want to implement a nonlinear beam element based on plasticity, where moments, axial and shear forces are a nonlinear function of curvatures and strains.
We looked at Borek's and Mikael's comments in Beam3d and where wondering how to proceed now:
1) Should we use cross-sectional information (A, I) in the material model
or
2) should we implement the nonlinear equations (with status) in the cross-section.