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Problem with non-mappable faces

Altair Forum User

Hi,

I'm quite new at hypermesh and i'm trying to mesh a solid but came across the problem i couldn't solve.

I have lots of components that similar to the below picture and same non-mappable faces; these are steps i'm following;

-geometry> solid edit> boolean > operation type is advanced > commbine through is none.

with this method i obtain this faces;

<?xml version="1.0" encoding="UTF-8"?>

i'm using this following for the mesh;

- 2D> automesh then 3D> solid map.

but i get a warning that non-mappbale faces exist.

<?xml version="1.0" encoding="UTF-8"?>

if you guys find out what my solution is i'd be appreciated,

Thanks for the helps.

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tinh

Hi,

send us your model (partial model) so we can help you faster than writing a guide for you

Altair Forum User

Here,

Unable to find an attachment - read this blog

tinh

Hi,

Looks you model built up from thin member, so you should make SHELL (2D) model, share node between members

if you still want to make 3d (but why 3d?), thicken the shell (panel 2d>elem offset>thicken shell), and make RBE2 or RBE3 connect members

Altair Forum User

Thanks for the advise @tinh

Okey, i followed your way, i dont know i'm doing correctly but my mesh is looking good until i give it a thickness,

elements have 12 T connections warning showed up now where the components' intersection area. How am i gonna put distance between them? since i begin to the procedure with solid boolean there is no room for thickness i asume.

<?xml version="1.0" encoding="UTF-8"?>

tinh

Hi,

it is ok to share nodes at the position, so you see 12 t-connections

solver understand it is continuous, it means the two members are fully welded

if you make a distance there, the two members are disconnected and cannot form a structure (unless you will connect them by some else elems like rbe2,rbe3,...)

Altair Forum User

i ran some tests and my professor told me the shell elements are not proper for our model ( i'm talkn abouth hole bus ) . He wants me to do it as solid body, is there any other options ?

Altair Forum User

The only problem i have for now is this, i believe i can progress if i can mesh this part.

<?xml version="1.0" encoding="UTF-8"?>

Rahul Rajan_21763

Could share your model file?

Regards

Rahul R

Altair Forum User

Here is a part of upper frame of the bus, it's keep going almost same sequence.

The problem is, the components doesn't match perfect as you can see so i found solid boolean is the way to macth them, after doing boolean it creates a surface that i couldn't mesh.

Thanks.

Unable to find an attachment - read this blog

Rahul Rajan_21763

Hi,

I have observed too many CAD modelling error which is not allowing your model to convert in mappable solid.I believe you can correct this easily in CAD software.