Does behaviour of RBE2 element changes when the meshes are not perfectly coincident ?

ECor
ECor Altair Community Member
edited December 2022 in Community Q&A

Hello, 

 

I am attaching a support to a base plate, to analyse the load transfer to the base plate. The problem is that meshes are not coincident, and thus, I can't do an equivalence to join the components (cf. image below, support in grey and base plate in blue).

image

I am working with Nastran, and I have thought about joining them with RBE2 elements (using Spotweld tool). As the meshes are not coincident, the RBE2 will not be straight and therefore my question. If I choose to link the 6 dof in the RBE2 element it should not be a problem that the RBE2 are not straight, right ? Otherwise, do you have any other idea to link these two components ?

PS.: by straight I mean that the RBE2 is not perpendicular to both surfaces/components.

Thank you in advance !

Cordially, 

              EC 

Answers

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited December 2022

    Hi,

    I believe the general behavior, far from the connection area will be the same.

    Some local differences might be present, but neglectible in general.

    Another option would be using a contact (bonded/glue) to connect these dissimilar meshes.

    It would work perfectly to transfer your loads.

    I'm not Nastran expert, but I remember they have these glue contacts.

     

Welcome!

It looks like you're new here. Sign in or register to get started.

Welcome!

It looks like you're new here. Sign in or register to get started.