convergence issues
convergence issues
(OP)
Hi,
I'm modelling a structure using a bilinear material model.
At yeild, the tangent modulus is set to 5% of initial modulus. I'm having problems with my solution converging. The force appears to converge, but not the displacement. I am guessing that this is because once my modulus is significantly softer I am starting to get large displacements. I have set nlgeom to on. Is there a way I can remove the displacement as a convergence constraint or any other suggestions for dealing with this.
Thanks in advance,
Mel
I'm modelling a structure using a bilinear material model.
At yeild, the tangent modulus is set to 5% of initial modulus. I'm having problems with my solution converging. The force appears to converge, but not the displacement. I am guessing that this is because once my modulus is significantly softer I am starting to get large displacements. I have set nlgeom to on. Is there a way I can remove the displacement as a convergence constraint or any other suggestions for dealing with this.
Thanks in advance,
Mel





RE: convergence issues
Regards
Jalil
RE: convergence issues
yes, in my output i have a note that plastic strain exceeds 5% and then begins bisection. The solution eventually converged, but I think that this cutcontrol will be very helpful!!!
Thanks!!
Mel