How to delete the edges or lines on the surface when I import a .stl file

ke zhang
ke zhang Altair Community Member
edited November 2020 in Community Q&A

Hi all,

 

I am using Hypermesh of version 2017.2 to process a geometry.

We used Meshmixer to generate a surface geometry and export as the .stl file. However, the Hypermesh just regards .stl file as mesh when importing the file to it. And it looks like this after import:

image

I want to convert it into geometry first. So this is what I do:

Geometry > creat > surface > from FE

This is the setting of from FE:

image

The surface looks like this:

image

My questions are

1 What the points are on the surface? They are made by Hypermesh? 

2 How to delete the edges on the surface? Because I need to assemble this geometry with another later, and the edges are redundant and a big problem for me to mesh in the future. And I have imported the .stl file into Comsol, and it regards the surface as a whole without edge. So I think the edges might be the features recognized by Hypermesh.

 

Thanks a lot!

 

Ke

Tagged:

Best Answer

  • Q.Nguyen-Dai
    Q.Nguyen-Dai Altair Community Member
    edited November 2020 Answer ✓

    Press F11 to show the panel "Quick geometry edit":

    image

    Use "toggke edge" to disable edges; "add/remove point" to remove points if necessary.

     

Answers

  • Q.Nguyen-Dai
    Q.Nguyen-Dai Altair Community Member
    edited November 2020 Answer ✓

    Press F11 to show the panel "Quick geometry edit":

    image

    Use "toggke edge" to disable edges; "add/remove point" to remove points if necessary.

     

  • ke zhang
    ke zhang Altair Community Member
    edited October 2020
    Q.Nguyen-Dai said:

    Press F11 to show the panel "Quick geometry edit":

    image

    Use "toggke edge" to disable edges; "add/remove point" to remove points if necessary.

     

    Hi,

     

    Thank you so much for the quick reply. I have toggled edges in this model. It looks like this:

    image

    It seems that the solid lines become dash lines and only one surface left indeed. Could I delete them and what they are? 

    Then I try to mesh it: 

    image

    But get the report:

    image

     

    Error identifying faces

     

    Is this related to the dashlines? Thank you.

  • Q.Nguyen-Dai
    Q.Nguyen-Dai Altair Community Member
    edited November 2020

    I don't think disable all edges is a good idea. Try small area, step by step. No way to do this work automatically.

  • ke zhang
    ke zhang Altair Community Member
    edited November 2020
    Q.Nguyen-Dai said:

    I don't think disable all edges is a good idea. Try small area, step by step. No way to do this work automatically.

    Thank you. But there are too many edges (23197) on the surface. Is there any way to suppress the number of edges or any other geometry format more suitable for Hypermesh than .stl?

  • Q.Nguyen-Dai
    Q.Nguyen-Dai Altair Community Member
    edited November 2020

    For CAD "neutral" format, it's better to work with STEP, IGES or Parasolid.

  • ke zhang
    ke zhang Altair Community Member
    edited November 2020
    Q.Nguyen-Dai said:

    For CAD "neutral" format, it's better to work with STEP, IGES or Parasolid.

    Thank you very much. We manually process the model and find a way.

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