Scrap-iron and steel pipe against aliens

Last crawled date: 1 year, 10 months ago

See the second round: https://grabcad.com/library/round-2-scrap-iron-and-steel-pipe-against-aliens-1
See the third round: https://grabcad.com/library/round-3-scrap-iron-and-steel-pipe-against-aliens-1
The idea is the following: analyze the strength of ordinary parts
(the rod and tube) with compare the same size of complex parts (aliens).
We use the same material and terminals (for all parts) for fixing and loading.
The load is applied in the center of the circular recess,
fixing the outer cylindrical surface of the fixing terminal.
Rod Is located flush with the flat area of the terminals.
A plane bending is studied.
The ratio of the maximum load (the maximum stresses equal to the yield stress)
to the weight of parts gives us a criterion of excellence.
The problem that the analysis using the finite element method (FEA) incorrectly calculates the complex parts.
In other words my parts are poorly designed and are not suitable for the FEA analysis :-)
This is true for Autodesk Inventor.
Perhaps another CAD program simulates better.
I upload all parts in the STEP format.
I will not leave attempts to solve this problem.
I would be glad if somebody help in solving it.
Well, if someone has read the description up to this point (:-) let me know )
1.Alien 0. Combinations of solids does not work properly in complex cases. Perhaps there is an additional interpolation error at the Voronoi cell boundaries.
2. Alien 1-3. The reason for the defects: the standard sets of joints (t-pipe) do not exactly correspond to the geometry. set Automatic modification produces artifacts. We need to develop a suitable part geometry or a custom set of joints.