Connecting two solids via CBush

Altair Forum User
Altair Forum User
Altair Employee
edited November 2020 in Community Q&A

Hi together,

 

I try to connect two solids via Cbush Spring-Damper Elements. Unfortunately the connection between the solids doesn' t seem to work properly. When i set the K properties to rigid, they doesn t work as rigids. 

 

I tried to connect them over two very thin shell meshes one the surface of each of the solids.

 

Do you have any idea why this happens?

 

Is there a better way to connect two solids via cbush?

 

Attached you find the File

 

Thank you for your help!

 

Sebastian

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited October 2017

    If you have a negligible shell  thickness, you will have nearly no bending stiffness so at the ends of the bush element you will have a hinge.
    If you increase the thickness of the shells the bending stiffness increases, you are getting more and more rotational stiffness for the bush to connect to.

    I recommend to use a RBE3 element to distribute the load from the bush element to the volume elements.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2017

    Thank you for your reply.

     

    Is it also possible to connect the two solids elastic using a contact?Therefore we need to manipulate the non linear spring, which is responsible for the transverse frictional force in a way to produce a force without having a corresponding normal force?

     

    Best Regards,

     

    Sebastian

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