Error: One or more entities failed to mesh. Need help regarding meshing

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  • Last Post 12 February 2019
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dpteo posted this 11 February 2019

One or more entities failed to mesh. The mesh of the bodies containing these entities may not be up-to-date.  However, meshing might be successful on the other entities.

I have this re-entrant structure that I have problem meshing, I tried meshing using different methods it all resulted in the same error. However I was able to mesh an exact same structure but 5x5 cm instead of 20x20 cm. 

Can anyone take a look at my model and provide guidance?

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jj77 posted this 11 February 2019

I have a student licence so I get some/warning error when using the stp, so I have opened it in the software (Strand7) I use and where I know exactly what is going on, and the problem are the surfaces/faces shown below (mark with red). With these faces, the part can not  form an enclosed volume, thus, any mesher can not generate a 3D volume mesh of this part. Remove these features/faces and it meshes fine.

You can then tet mesh or sweep this part.

 

Have in mind also that meshers do not like large faces with narrow features, so I would try and split this face/body up into smaller faces, and also along the longitudinal axis (directions is from one zig zag face to the other)

dpteo posted this 11 February 2019

Thank you jj77, however I do not see the thing that you circled on my model.

This is what my model looked like

jj77 posted this 11 February 2019

 

The reason are the features cutting into each other requiring this a tiny mesh size (~1E-7 m). 

One can split the part at this location thus ending up with 3 parts (make also new part, multibody part). That is top and bot. plate structure and central zig-zag like structure.

 

 

To add, there is also a crack along the corner edge, not sure if that should be like that.

Attached Files

dpteo posted this 12 February 2019

Thank you, however if I split into 3 different parts during the simulation will it count as 1 solid piece?

jj77 posted this 12 February 2019

You can make a multi-body part in DM - select the 3 bodies (on the parts,bodies tree), and mouse right click, selecting then finally form new part.

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dpteo posted this 12 February 2019

Thank you jj77, will give it a try

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