Better Method for Spotweld in LSDYNA ?

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

Hello Guys,

 

I want to connect two rollers with 2D shell-Mesh  which are inclined at an arbitrary angle and i want to connect them with spotwelds.

 

Which method is better 1) Mesh Independant : Where we connect Element  to Element via Spots and Contacts with MAT 100 and Property.  or 2) Mesh Dependant where Node to Node Connections are specially established without any contacts and so on ?

 

So what  are specifically Pros and cons of these methods ? Can anybody help me out ?

 

Thanks !

 

Regards,

 

Ashish

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2018

    could you show pics of your model.

     

    both variants are right, every suggestion does work good, but you should decide how to solve you issue by yourself.

    do you have test result for your weld? do you make crushable weld?

    advantage for spotweld is that you do not make shell mesh.

  • Pranav Hari
    Pranav Hari Altair Community Member
    edited October 2018

    Hi Ashish_MEXPERT

     

    I think you can use the Mesh independent method to connect the rollers. 

    You can see this video for better understanding.

     


     

  • Ashish_MEXPERT
    Ashish_MEXPERT Altair Community Member
    edited October 2018

    Hello,

     

    Thanks guys for your suggestions, i just wanted to clear this doubt ,

     

    the concept of spotweld Mesh Independant used normally when the components are not perpendicular to each other right ?  So that its possible to join them with the contacts because the normal force component of 1D element is arbitrary ?

     

    Let me know if i am clear with this concept. Thanks !

     

    Regards,

    Ashish

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