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Structural & Thermal

Structural & Thermal

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  3. What is cause of following warning message and how to overcome the same: The maximum contact stiffness is too big. This may affect the accuracy of the results. You may need to scale the force unit in the model.How do I scale the force unit.

What is cause of following warning message and how to overcome the same: The maximum contact stiffness is too big. This may affect the accuracy of the results. You may need to scale the force unit in the model.How do I scale the force unit.

Tagged: 18, contact, mechanical, structural-and-thermal, structural-mechanics, thermal
    • April 5, 2023 at 2:32 pm
      FAQFAQ
      Participant

      ​This is a limitation of penalty based contact. This warning occurs when normal contact stiffness (FKN) is higher than 10^16. To remove this issue we need to change the “unit system” in Mechanical. By defaults the unit of normal contact stiffness (FKN) is FORCE/LENGTH^3. If we change the (m kg N..) unit system to (mm kg N..) unit system the new FKN value will be 10^(-9) times the previous one.​ You may also try to change the contact algorithm.

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