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Bolted joint Simulation using MARC.

Hi Everyone,

Apologies if this is a basic question I'm new to MSC Marc.

I've modeled a half-staggered bolted joint with symmetry along the vertical axis (perpendicular to loading). I applied symmetry boundary conditions at the splice plate end by restraining displacement in the X direction and rotation about Y and Z. However, after analysis, the model exhibits unexpected free movement in the Y and Z directions and terminates with error 3002.

In a second attempt, I fully restrained all DOFs at the splice end. This time, the analysis completed successfully (3004) with no movement, but the results were not consistent with those from ABAQUS.

Additionally, I applied bolt pretension first, followed by a 5 mm displacement load in the X direction on the main plate. Surprisingly, the plate displaced by 10 mm in the final increment.

Despite several trials, I haven't been able to resolve these issues. I'd appreciate any suggestions. I'm attaching a comparison graph of results from both Marc and ABAQUS under identical settings.

Thank you in advance!

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  • Hi Fahad Ali,

    It sounds like you're having a tough time with your bolted joint simulation in Marc. Here are a few thoughts that might help:

    First, double-check your symmetry boundary conditions—they might not be fully capturing the behavior you're expecting. Fully restraining all DOFs can lead to unrealistic results, which explains the mismatch with ABAQUS. Try adjusting the constraints to better reflect real-world conditions.

    The 10 mm displacement is puzzling. Revisit how the bolt pretension and displacement loads are applied, and ensure your contact settings, like friction coefficients, are accurate.

    Differences with ABAQUS might be due to how each solver handles things, so make sure all settings and material properties match as closely as possible.

    Error code 3002 points to convergence issues.  It's tricky to pinpoint the exact issue without seeing the model, but hopefully, these tips guide you in the right direction.

    Please feel free to reach out to us at support@mscsoftware.com

    Regards,

    Amol Kumbhar

  • Thank you, Amol Kumbhar, for your valuable suggestion.

    Most of the basic settings, such as BCs and contact definitions, are similar to those in ABAQUS. Below, you can find the contact definition along with the load case preferences. If you have time and are interested in reviewing the model, I would be happy to share it with you via email.

     

Reply
  • Thank you, Amol Kumbhar, for your valuable suggestion.

    Most of the basic settings, such as BCs and contact definitions, are similar to those in ABAQUS. Below, you can find the contact definition along with the load case preferences. If you have time and are interested in reviewing the model, I would be happy to share it with you via email.

     

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