CBUSH is locked

Yuri S.
Yuri S. Altair Community Member
edited July 2021 in Community Q&A

Hi,

I am trying to gain confidence with the use of CBUSH elements. To do so, I set up a model which is composed by two plates: one is grounded and the other is free to move along the x direction. The two plates are connected by means of a CBUSH and a force is applied to the movable plate. Using a unit force and a unit stiffness, I expected a unit displacement of the second plate. Unfortunately, I get a numerically zero displacement. Apparently, I am missing something in the definition of the CBUSH. Could someone help me?
I attach a picture of the model and the model itself.

Thank you,
Yuri

 

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Best Answer

  • Jason_Craanen
    Jason_Craanen
    Altair Employee
    edited July 2021 Answer ✓

    Please use a more reasonable value for your material modulus.

    image

Answers

  • Jason_Craanen
    Jason_Craanen
    Altair Employee
    edited July 2021 Answer ✓

    Please use a more reasonable value for your material modulus.

    image

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited July 2021
    Jason Craanen_20442 said:

    Please use a more reasonable value for your material modulus.

    image

    Agreed. With your E extremely high, you add singularities to your matrix, then the results are wrong.

  • Yuri S.
    Yuri S. Altair Community Member
    edited July 2021

    Thank you, 
    I didn't consider that the Young modulus could be the problem.

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