Hex meshing a complex part

Builder
Builder

Hi,

 

 

What is the best approach to Hex mesh this part (please find the attached file)?

 

 

Thanks,

 

Aero1

8 REPLIES 8

Re: Hex meshing a complex part

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Hello!,

You can HEX mesh most of the part easily, but for the rest you need to have experience preparing the geometry. To start with please study & practice the following tutorial:

http://www.iberisa.com/transfer/ex13-tet_vs_hex-meshing.7z

Also, to learn more about HEX vs. TET meshing please visit my blog in the following address:

https://iberisa.wordpress.com/2017/12/10/how-to-mesh-in-femap-with-hex-and-tet-elements/

Best regards,
Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: Hex meshing a complex part

Builder
Builder

Hi Blas,

 

Thanks for your reply and for the exercise file,.... I don't have any problem with generating Tet. mesh but whatever I tried, couldn't created the Hex,... I'll follow the instruction as described in the file and will let you known if I have any problem.

 

Regards,

 

Aero1 

Re: Hex meshing a complex part

Gears Phenom Gears Phenom
Gears Phenom

Hi Aero

 

Depending on what SOL you intend to run - you might find it easier/quicker to use some glue connections.

 

I had a quick look at the geometry this morning - my first initial thought was you will experience difficulty (not impossible) to mesh match the HEX as the plate has different thickness throughout - splitting those will require significant time.

 

The image below took me around 5 minutes - simply remove all rads etc, split the geometry into "common" sections, glue this together and run a free free modes to ensure connectivity. This will also work with including the rads etc just glue them also (increased connection regions).

 

This is not the perfect/only solution but it will save you a lot of time and effort trying to split every body to match.

 

 

*IMAGE DELETED*

 

 

 

 

Re: Hex meshing a complex part

Builder
Builder

Hi Stuart,

 

Thank you for your helpful comments and suggestions, would you explain how you glued the pieces back together?

 

Aero1

Highlighted

Re: Hex meshing a complex part

Gears Phenom Gears Phenom
Gears Phenom

Hi Aero

 

There are quite a few tutorials available on glued connections, but below is how to achieve it in the most basic sense.

 

- Split your geometry into "hexable" solids (image shown is not), and decide where the hex transitions will be difficult to achieve.

- Make these surfaces your Glue contact surface

- Create connection property as shown

- Set up connector

- Done.

 

*IMAGE DELETED*

 

 

In the previous post I had split the solid into quite a few individual solids which could be slaved to create three separate hex regions and glued these together using the above method. 

Re: Hex meshing a complex part

Gears Phenom Gears Phenom
Gears Phenom

FYI

Re: Hex meshing a complex part

Builder
Builder
Thank you so much for your very useful feedback.

Re: Hex meshing a complex part

Builder
Builder
Thanks again!.