Learning Forum

[roberto]

We want to be sure that the fasteners and springs are using a correct CID and the shear and axial loads are well transmited.

For fasteners, we are currenlty using ELEMENT_BEAM without a third node, SECTION_BEAM elform 9 and SCOOR 2 and MAT SPOTWELD.

For the springs, as we need stiffness in all three translations, we are using ELEMENT_BEAM without a third node, SECTION_BEAM elform 6, no CID and SCOOR 2,  MAT_LINEAR_ELASTIC_DISCRETE_BEAM with the respective values on TKR, TKS and TKT. 

If you need any more data, please share it. 

[Ram Gopisetti]

Hi, 

As per the Manual, 

Node 3 is optional for beam types 3, 6, 7, 8, and 9, which means your faster modeling approach is correct. Additionally, the third node is used for the discrete beam (type 6) only when SCOOR is set to 2.0 in the SECTION_BEAM input. However, even in this case, it remains optional. Therefore, your approach is correct.

Cheers, Ram 

[roberto]

Hello Ram,

Thanks a lot for your help. It is clear now. I guess that what Dyna does is to use an aleatory perpendicular vector to the N1-N2, and that is why it is only applicable to circular sections?

Best regards,
Roberto