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  1. josemanuellodoso

    SOL 106 Non Linear Elements

    Thanks, but RIGID = LAGR isn't avaliable for SOL 106.
  2. josemanuellodoso

    SOL 106 Non Linear Elements

    Hi, I want to say that when I plot CBUSH_Forces as vectors they don't follow a logic pattern (independently of the co-ordinate system). Due to this illogic forces, the stresses that appear in the spar and in the fitting elements is illogit too, even taking into account the presence of the RBEs...
  3. josemanuellodoso

    SOL 106 Non Linear Elements

    I have a joint between a fitting (modelled by tetra10 elements) and a spar (modelled by cquad elements) in which each fastener is modelled by: -RBE2 attaching 4 nodes of the fitting to central node 1 (DoF 123456) -CBUSH between central node 1 and central node 2 (the same node duplicated). (PBUSH...
  4. josemanuellodoso

    USER FATAL MESSAGE 4658 (NPEND)

    Thanks. I have solved that problema. It was related with way of simulate a sliding joint, I had a free degree of freedom. Now, at least, the anlysis has started and for 2% of load the solution has converged, but it is a big model and it takes a lot of time.
  5. josemanuellodoso

    USER FATAL MESSAGE 4658 (NPEND)

    That fatal is solved, it was caused by elements which are bad connected. However, the model still doesn't run. I am doing 100 steps, and in the first step after 5 bisections due to large incremental rotations, that means with only 0.2%, EPI is 8.4E15. Why the model is not able to start the...
  6. josemanuellodoso

    USER FATAL MESSAGE 4658 (NPEND)

    I am running a SOL 106 analysis and in the .f06 file I get: USER FATAL MESSAGE 4658 (NPEND) DIFFICULT GEOMETRY PREVENTS FURTHER COMPUTATIONS FOR ELEMENT WITH ID = 1970001 But this element is ok. This message appears after a 5 bisections without convergence in any step.

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