CATIA GSA (Generative Structural Analysis) Assembly Question
CATIA GSA (Generative Structural Analysis) Assembly Question
(OP)
Hello. I am running some FEA analysis in Catia using the GSA module of a rivet installed through two plates. I believe I am getting the correct stress value from my model for the large plate. But the secondary plate and rivet show 0 stresses. I am wondering if anyone thinks this is correct. Also the maximum stess is located in the plate on the side of the hole, in line with the load instead of perpendicular to it as the open hole case shows. I'm also wondering if this is correct. Please see attachment. Thanks.





RE: CATIA GSA (Generative Structural Analysis) Assembly Question
In this case, your rivet may perfectly fill the hole (is it a contact solution?). This would create a path for the load to travel through. If you were to create a clearance hole, you would see a different story. A close tolerance hole would be different as well.
Are you loading the rivet/fastener? If so, this will also change the local stresses.
But the better question is what do you want to do with this stress? It may be relevant for metal fatigue or composite structures, but is not useful for static strength calculation in metals. Furthermore, there are classical ways to treat problems like this (which should be your first step). I would encourage you to investigate those avenues as opposed to using what is called a "push button" FEA by the industry.
Brian
www.espcomposites.com
RE: CATIA GSA (Generative Structural Analysis) Assembly Question
RE: CATIA GSA (Generative Structural Analysis) Assembly Question
Alternatively, if you have access to a more common FEM software package, it can be done with relative ease. For example, you could just run it as a 2D solid (plane stress) element. It is relatively simple for a neat fit. If you want to look at the effect of small clearances, a contact solution would be appropriate. The CATIA solution could probably do this as well, but there are few structural analysts (sole duty) who are familiar with that approach (and hence less support).
Brian
www.espcomposites.com
RE: CATIA GSA (Generative Structural Analysis) Assembly Question
RE: CATIA GSA (Generative Structural Analysis) Assembly Question