Constraint Definition

hiranwale_bharat
hiranwale_bharat Altair Community Member
edited October 2020 in Community Q&A

Hello everyone,

 

Is it possible to give constraint in only on direction (like the body is constrained in positive x direction but free in negative x direction)?

 

Regards,

Bharat

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2015

    Hi Bharat,

     

    What is the use case and what is the type of analysis you are simulating?

  • tinh
    tinh Altair Community Member
    edited August 2015
    Altair Forum User said:

    Hello everyone,

     

    Is it possible to give constraint in only on direction (like the body is constrained in positive x direction but free in negative x direction)?

     

    Regards,

    Bharat

     

    Hi,

    CGAP elements may help you in this case

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2015

    All,

     

    If the physics of the problem allows, here is the procedure to accomplish: 

    1. Create a duplicate node and translate it along positive X direction (any small distance.) 
    2. Create a gap element such that N1--> N2 is directed in positive X direction. (Make sure to place the gap element in separate collector) 
    3. Create a PGAP property and assign it to the CGAP element. 
    4. Card edit the PGAP property and enter KB = 2E+20 (basically a high value) 

    This will restrict the motion of the node (N1) in positive X direction. 

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited August 2015

    Hello Prakash and tinh,

     

    Thanks for the reply.

    Regards

    Bharat

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