Cap Holes/Cap Holes Ex for complex open BReps

Grasshopper
1

Hi there,
I am wanting to do some analysis in Abaqus on the unit cell of a lattice. I designed the geometry in Grasshopper and want to export as a STEP file to Abaqus. First I created lines that represent the lattice geometry. I then applied Multipipe to make the model solid. I then split the BRep using a box that represented the volume I want to keep. I extracted the index 0 item from the list (the Brep I wanted to keep) and applied Cap holes to make it solid.

However, pipes that have multiple open faces (Circled in yellow) aren’t capped. Is there an easy way I can cap these holes?

Picture1
Picture1685×581 258 KB

The output I have to work with is a single Brep with ~1000 edges so it is difficult to identify the edges of those open pipes from which I could maybe create a surface.

Any suggestions would be very appreciated.

I have attached the grasshopper file. The Purple and light blue groupings are just geometry creation. The pink group is my output and maybe the orange group is of interest where I trim the Multipipe component to what I want. I am using Rhino 7.
Triclinic unit cell Solid.gh (33.3 KB)

2

IMO, you need boolean operation rather than split brep.

Canvas at 00;19;38
Canvas at 00;19;381736×500 324 KB

Triclinic unit cell Solid_re.gh (31.9 KB)

3

That’s fantastic, thank you so much for your help - exactly what I needed.

I actually tried Solid intersection as well as various combinations of Solid Trim and Boolean Difference etc. But they always did something funny like leave one floating pipe outside the volume. I must have not flattened properly or something because SInt works on my original file now too.

Anyway, thank you again I really appreciate it!