ERROR # 4965 & ERROR 5905

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

guys, can u help...... how to give self contact for the spring which wouldnt penetrate while doing non-linear analysis...i am hypermesh with opticstrut as slover

https://photos.app.goo.gl/9MARHszowpG7fMJ1A

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited June 2019

    Which version of OptiStruct you are using? Please share the .out file of the run.

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited June 2019

    Hi @tejas6

     

    group1 & 2 should be changed from stick to freeze contact.

    Self contact for the spring can be set-up with S2S and CONSLI. However, the model fails to converge beyond 75% with errors:

     

    *** ERROR # 4965 ***
     Maximum number of time increment cutbacks reached,
     analysis aborted.
      
     *** ERROR # 5905 ***
     Severe element distortion detected,
     analysis aborted.

     

    Because the model undergoes geometric and contact nonlinearities it could be solved more computationally efficient with Radioss explicit solver. 

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  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2019

    If the solver reports excessive mesh distortion, consider the following reasons:

    • Excessive or unrealistic loading
    • Over-constrained FE model
    • Inconsistent unit system between model, material and/or loading that lead to excessive deformation

    Reviewing the last non-converged iteration in HyperView will help

     

    Please refer to attached model from OptiStruct example guide.

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