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ERROR # 4965 & ERROR 5905

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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. 

hm_edit.fem hm_edit.hm

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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.

OS-E 0195 Compression of Helical Springs usingSelf-Contact.pdf mola_Self_contact_v2_SPCF.fem

Simon Križnik likes this

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