How can i know the diameter of RBE3 bolts that i choose ?

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

Hi, 

 

Please How can i know the diameter of bolts that i choose ? 

i can not find the diameter column to know it !

 

Best

<?xml version="1.0" encoding="UTF-8"?>diameter.PNG

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hi,

     

    Dia of the Bolt is same as dia Hole. So, use F4 Key to find out the dia of Hole.

     

    thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Thanks Premanand, 

     

    But i have used RBE3 elements for the fixation without make holes 

    what i can do in this case ?

     

    Thanks 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Sorry, i didn't get you. You have created bolt connection between two holes right?

     

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    you can create bolt connection using RBE3 between two elements 

    Thanks 

     

    <?xml version="1.0" encoding="UTF-8"?>774.PNG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    yes i know that, but why are you creating bolt connection between two elements? bolts are created between two components to hold them together.

     

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    yes that is what i did

    i have created bolts between two elements of two componenets

     

    Thank you 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Please understand, Bolt is created between two 'Holes' of different components, not between two elements.

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2018

    Hi,

     

    You may wish to create RBE3 between two components instead of in between 2 holes, that's fine. 

     

    But why you want to know the Dia of RBE3 element. RBE 3 is a rigid element &  will not deform with even infinite forces. If you are interested to know the stress on joint/link (represented by RBE3 by you earlier) make RBE3 web for each component & connect it via BAR element on which you can give dia.

     

    Hope it helps.

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2018

    Also for most practical cases, bolts are last to fail, before that material of component fails. That is why, usually bolts are not modeled and rigid RBE2 and RBE3 elements are used.

  • tinh
    tinh Altair Community Member
    edited August 2018

    Wrong.

    RBE3 is not rigid, it's deformable

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2018
    Altair Forum User said:

    RBE3 is not rigid, it's deformable

    Agree..

     

    RBE2 imposes stiffness, but RBE3 is an interpolation element.

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