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Seeking Model Examples for the CLRNC Card in OPTSITRUCT

YunMiao_1997

Hello everyone,

I’ve recently developed a strong interest in the CLRNC card within OPTSITRUCT and have been eager to learn more about its practical application through specific examples.

I’m reaching out to ask: Does anyone in the community have access to relevant document examples (such as .fem file, setup guides,) for the CLRNC card? If you do, sharing them would be extremely helpful for my learning process.

Thank you very much for your time and any assistance you can provide!

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Rajeev_Vanam

Hi,

You can find more details about CLRNC card in the official documentation using the link below

https://help.altair.com/hwsolvers/os/topics/solvers/os/clrnc_bulk_r.htm#clrnc_bulk_r_reference_n5j_zj2_t4b__clrnc_bulk_r_section_vzg_bk2_t4b

I am also attaching a sample model with CLRNC card defined using CONTACT card for your reference.

ThreadedBolt.fem

YunMiao_1997

Thank you for your reply. When I was running the example, it prompted a non-convergence issue. Could you please help me figure out what the problem is? I used OS-2022.

*** ERROR # 941 ***
NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 1

Suggestions:

This problem has nonlinear materials and the number of load increments is small.
Increasing NINC may help achieve convergence.

ANALYSIS COMPLETED.

*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.

*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.

Hakan_20716

I solved the model with OptiStruct 2025.1 without any errors. I recommend solving it with the latest version.