ERROR # 4965 & ERROR 5905

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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Rahul Rajan_21763

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

Simon Križnik

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

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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