Hello Thomas,

thank you again for you help.

thschrader wrote: ↑Tue Apr 07, 2020 5:25 pm

You use 4 different materials with different densities. There should be 4 entries for

self weight. I will try this tomorrow (I am writing from my private pc without FC0.19...)

So far I thought that the self-weight boundary condition refers to the whole fusion. I have not yet been able to create them for individual materials. But in principle this approach could lead in the right direction, because this would at least be an explanation why the input file cannot be created for the whole model, but for partial models without problems. I'll look at this intensively again tomorrow.

thschrader wrote: ↑Tue Apr 07, 2020 5:25 pm

And I will try rexroth profiles. Which one?

Currently I plan to use the following aluminium profiles:

https://easy-systemprofile.de/Profil--N ... rland.html
https://easy-systemprofile.de/Profil--A ... il-96.html
These are certainly not the original Bosch / Rexroth, but they are at least "compatible" and have the same alloy:

Young's modulus for Al Mg Si 0,5: E = 70.000 N/mm^2

**45 x 45 mm**
moment of inertia Alu-Profile: I_x = I_y = 134.572 mm^4

moment of inertia rectangular block: I_x = I_y = 341.719 mm^4

--> equivalent Young's modulus: (134.572 / 341.719) * 70.000 N/mm^2 = 27.567 N/mm^2

**45 x 90 mm**
moment of inertia Alu-Profile: I_x = 323.570 mm^4, I_y = 1.250.353 mm^4

moment of inertia rectangular block: I_x = 683.438 mm^4, I_y = 2.733.750 mm^4

--> equivalent Young's modulus: (1.250.353 / 2.733.750) * 70.000 N/mm^2 = 32.016 N/mm^2

[whereby I_y is the the less favourable case]

In the end, the flexural strength (= I * E) of the aluminium profile and the rectangular block should be the same, hopefully.

Best regards

Michael