Sink Mark Depth

[Anonymous]

I usually don't do much work in Midplane.

I am using it so that I can see Sink Mark Depth results.

For some reason I can only get the Sink Mark Index result.

I made sure Sink Mark Depth is in my default results.

Does anyone have a suggestion?

John

[nordhb]

Hi,

this might be related to how the features are modeled.

The Sink marks, depth result only indicates sink marks likely to be caused by features on the opposite face of the surface.
When modeling such features in Midplane, the model will need to have Non-manifold edges, meaning at least 3 triangles sharing an edge. (A non-manifold edge is a mesh edge with more than two entities attached to it.)

If having the features modeled as such in your model, the Sink marks, depth result should be displayed.
(the result plot is generated by a Pack analysis using Midplane analysis technology)

You can find edge details information in Mesh Statistics information such as:
Edge details---------------------------------
    Free edges    132
    Manifold edges   1995
    Non-manifold edges   6

and/or use Mesh Diagnostics > Free Edges Diagnostics to view Non-manifold edges.

Regards,
Berndt

[Anonymous]

Sir,

Thank you for the response.

I have made a very simple model to experiment with.

It is just a rectangle with a rib on the bottom.

I went into the model and created some nonmanifold edges on the rib, and re-ran the analysis.

The Sink Mark Depth result still is not there.

Do you have any other suggestions?

Thanks

John

[nordhb]

Hi,
created a rectangular test model with two ribs: one having non-mainfold edges, and one having no non-mainfold edges.
The Sink marks, depth result is set in default.
It shows Sink marks, depth result as expected on rib having elements with non-mainfold edges, using Autodesk Moldflow Insight 2011 Service Pack 2.
Please, see attached picture.

Also created a rectangular test model with one rib in center all along, as a T cross section.
It shows Sink marks, depth result as expected.

Can you attach the study/pictures?

Regards,
Berndt

[Anonymous]

nordhb,

Thank you for taking the time to do this.

I now see how to do it.

Thank you.

John

[Anonymous]

Berndt,

Does that mean I must go in and manually modify all of the ribs so that they are nonmanifold?

That creates much work for a complicated part with lots of ribbing.

(see attached)

Is there a way to make it faster??

Thanks

John

[nordhb]

Hi,
the picture shows a Dual Domain model, from what I can see.

There is a built in Midplane Generator in Insight, if you want to collaps a Dual Domain mesh to Midplane.
Some clean-up in cad model recommended, such as remove small fillets, text et.c., before importing the geometry and mesh to Dual Domain, to improve midplaning result. Fix any mesh issues present on the Dual Domain model.

Change mesh type: Select Set Mesh Type > Midplane.
Right-click the Midplane Mesh icon and select Generate Mesh.
Select the Remesh already meshed parts of the model checkbox to remesh the model entirely.
Click Mesh Now.

Attach a picture of an example.
For optimal result you might have to adjust inital mesh settings such as Global edge length and any other required parameters if needed.

Creating a midplane mesh from a solid or Dual Domain mesh with many ribs and features will involve manual work,
depending on design of intersections, how the features are attached, and the midplane result.
This manual work involve geometry and thickness property.

If you need furter assistance on modeling on specific geometry, I recommend you to contact your local support.

Regards,
Berndt