CAD model
Your model is not meshed properly or the mesher cannot even complete the meshing?
This kind of problem happens to everyone, even the most skilled in FEA.
Nowadays, CAD models tend to have too many details and so it is difficult for an analyst to simplify those models enough to get a proper mesh.
Meshing problems are often caused by small edges or faces in the geometry and that’s why you have to find an efficient way to spot those geometrical problems.
How to your find the problem in your CAD model?
That’s he question I always wondered… CAD models can be so big that it is difficult to find where is the problem!
getting back to CAD and searching everywhere without knowing what could be wrong is the worst that can happen. You can search for hours without finding anything. Then you try again to mesh, it still doesn’t work…and you start over…what a loss of time!
Being an engineer means being efficient and knowing the fastest way to solve such a problem.
I found a method, my own method. i am not telling this is a perfect method, but at least it works well!
I can find the problem is few minutes. DO you believe that?
The CAD division method.
This method is a secret method that no one will teach you. But I guarantee it will solve your problem 90% of the time.
I called it the CAD division method.
Watch the video below and you will understand how it works.
When you will see what it is, you will tell yourself:”That’s so simple, why I did thought about that??”
Just watch and you’ll see.
Now here are more articles you may like:
How to face a singularity error?
FEA basics – CAD model simplification for FEA analysis
If this article was useful to you, let me know, post a comment! Thanks
Great work. it does help me to understand how to find problems in the CAD model. Thank you. I would like to know if there is some other method to do the same, but faster, because when you have a big component to analyze, it could be quite difficult to do this method and also it could take a lot more time (moreover if there is a lot of places in the model with geometry problems).
I also would like to know if there is some advices to make a CAD model at the moment in which I drawing it in a CAD software in order to avoid most of geometry problems.
Thanks for your help and your concern.
Job Guevara
Hello,
I just want go give my opinion on that.
If you have to make a calculus on a big part, you can gain time with a good mesh. One way to have a good mesh is the partitioning. So if you cut the part in a smart way, you will be capable to mesh and improve it in the same time.
Now, that’s just my opinion.
Thanks Cyprien for this article. It seems so simple and in the same way, it’s not the first think.
Exactly! If have a big model that doesn’t run or solve (as almost always…), break it into smaller components until you are sure that every components is solving well and then regroup and add parts again until you finally get your big model to solve. It requires a lot of patience to do that, but that technique ultimately always works. Thanks for commenting the article and giving your opinion Charlie! :)