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Joey_Chen11-Garnet
11-Garnet
June 9, 2022
Solved

The gray area between linear and nonlinear for static simulation

  • June 9, 2022
  • 2 replies
  • 5955 views

When the stress-strain response of the material is defined as "Linear"; under what conditions one must activate the "plasticity" for the simulation.

 

Static simulations with linear material responses are considered "small deformation" theory.

If plasticity or large deformation does not exist when using linear material responses, why not black out this function. 

Best answer by Joey_Chen

@skunks Thank you for the presentation material. I need time to figure out the theory. 

2 replies

skunks
skunks19-Tanzanite
19-Tanzanite
June 9, 2022

we use the plasticity for the calculation of the plastic collapse

    J
    Joey_Chen11-GarnetAuthor
    11-Garnet
    June 10, 2022

    Thank you very much for your reply and interest in this topic.

    Is this case done by using the "Elastoplastic" in the "Stress-strain response" definition of the material settings?

    skunks
    skunks19-Tanzanite
    19-Tanzanite
    June 10, 2022

    att. example for plasticity

      J
      Joey_Chen11-GarnetAuthor
      11-Garnet
      June 10, 2022

      Thanks again for your help.

       

      In Creo Simulate, when we perform a simulation where the maximum stress exceeds the yield point. In this case, we will apply "Elastoplastic" to the stress-strain response of the material definition. At the same time, "Large deformation" and "Plasticity" in the nonlinear options are automatically checked. With this setup, we may get a result that is close to the real world situation.
      Conversely, in a linear material circumstance, the "nonlinear option" in the Analysis Definition is still available. Therefore, I was wondering what kind of situation would use the nonlinear options. If not, why not to block these functionlity.

      Joey_Chen_0-1654851689246.png

      skunks
      skunks19-Tanzanite
      19-Tanzanite
      June 10, 2022
      • a linear material and large deformations (often)
      • a linear material and contacts (very often)
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