Gaps in Midsurface

Altair Forum User

I am a student and I am trying to run an impact analysis of a truck chasis. There are more than 100 components and I have created mid surface of all the components to do 2D mesh. I facing a problem where there are gaps. I have tried to use the extend surface option but not abler to remove the gaps. Please help me out. have attached a pic for reference. 

 

 

 

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Altair Forum User

I can't tell exactly what your problem is from the image, but if you want to extend a surface, I believe it has to have no mesh associated with it.

 

Are the gaps present because it's a different part or the same part?

• If it's the same part, you should make sure that your surfaces are correct before meshing and intersect them so that the surface edge lines are all yellow / green where surfaces meet. (Red indicates a free edge).
• If it's a different part then there should be a gap. You can attach the parts by creating fasteners with CBARs, CBUSHs, RBEs etc or define contact 

Altair Forum User

Another method: you can merge different parts before creating mid-surface.

Rahul_P1

Please go through the midsurfacing videos and material here 

 

http://www.altairuniversity.com/getting-started/video-library/videos-2/ 

http://www.altairuniversity.com/modeling/geometry-2/midsurface-pdf/midsurfacing-with-hypermesh/

http://www.altairuniversity.com/7196-advanced-midsurface-training-material/

http://www.altairuniversity.com/2525-mid-surface-meshing/

http://www.altairuniversity.com/6873-advanced-midsurfacing-self-paced-course-free-recorded-video/