Mesh to BRep Conversion Failing

[chrisWCQXN]

Ok, so I have read the following topics:

Mesh to Brep Missing

converting mesh to brep....painful!

Neither of them helped me figure out what the hell is going on, as I need the BREP Component so I can undertake torsion testing and stuff on it in Fusion.

Now all I simply want to do is convert this (Which would be an entirely welded component anyway) to a single piece, so I can see how weight (Of batteries and such) will impact the frame.

Example of the frame:

Plus also converting it to a Component means that I can then drill holes in it where I need to drill holes and such.

[chrisWCQXN]

Neither of them helped me figure out what the hell is going on, as I need the BREP Component so I can undertake torsion testing and stuff on it in Fusion.

Now all I simply want to do is convert this (Which would be an entirely welded component anyway) to a single piece, so I can see how weight (Of batteries and such) will impact the frame.

Example of the frame:

Plus also converting it to a Component means that I can then drill holes in it where I need to drill holes and such.

[HughesTooling]

If you were able to convert all you'd end up with is a Brep with 989181 faces so working with it would be painful in Fusion. also not sure how simulation would work or even if it would. I mean you'd have a brep that's basically a mesh, then the sim would try turning your mesh back into a mesh.

Mark

[TrippyLighting]

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@HughesTooling wrote:

... you'd have a brep that's basically a mesh, then the sim would try turning your mesh back into a mesh.

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A .stl mesh merely describes the surface of an object and the usual application for the creation of .stl meshes is 3D printing. FEM software usually meshes the volume of an object and mostly uses tetrahedral meshes. In order to mesh a volume, most commercially available FEM software requires BRep as input.

Is is very common for models having to be simplified for FEM analysis. that means geometric features that likely have very little effect on the overall performance of the product are removed. That's what the simplify workspace in the Simulation environment in Fusion 360 is used for.

A BRep is a mathematically precise description of  3D geometry comprised of analytical surfaces and NURBS surfaces.  As opposed to a triangulated mesh thus BRep representation of geometry is free of resolution. When a .stl file is converted into a BRep , every triangular facet is converted into such a mathematically precise surface and the result is a CAD model with an enormous amount of detail, exactly  that sort of detail that will make subsequent meshing with usual FEM software very difficult if not impossible.