Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

Help with Midsurface Extraction

Burner2k

I have a geometry which has pretty steep steps.

01.png.02149640041ac08a54d6be8e959f6838.png

I need to extract a midsurface as shown below (the dashed black line indicates the location of midsurface)

02.PNG.8a58c6c4194b51000995ce3c9cb0aadc.PNG

The best I could manage is shown below:

03.png.573c0d81ac5ce54e91be87e2796c08b8.png

I was not able to get rid of the surf line going vertical in the last step. I am attaching a stp file of the CAD model. Would appreciate if any help. If you are able to extract the midsurface, can you please list out the steps followed in detail?

Thx...

Unable to find an attachment - read this blog

Find more posts tagged with

English

HyperMesh

Accepted answers

All comments

QuyNguyenDai

Firstly, this part is NOT suitable for shell modelisation.

If you want always to do that, you have to admit there's maybe a lot of difference comparing to real behavior.

If the function 'Mid surface' can not five you what you wan, you can creare yourseld the surface manually, right?

tinh

In this case, offset bottom face will be faster. Panel geom>surface edit>offset

Burner2k

OK. I was just trying to get familiar with the procedure of creating midsurface for stepped plates and get HM to apply elemental shell property thickness definition automatically.

The last part is the main reason for me to obtain Midsurface. Of course idea is to extend the methodology for stepped plates. I will try to reduce the thickness of various steps to maintain shell ratio in the geometry and try it again.

I was certainly not gonna use shell representation for such a thick part during analysis.

Tinh, if I mesh a surface generated using Offset command, it won't be 'associated' with original geometry and hence HM won't apply shell property thickness automatically when I select the command Mesh > Assign > Midsurface Thickness command. It did not work back in HM 14...perhaps it may work now. Will try it later...