I am looking at a temporary EPS Foam Structure.
I’ve created my own material properties according to Foam.
I would like to test an interlocking mechanism that would assist with Foam’s ability to withstand lateral movement.
But first I need to understand how much I can span/cantilever with Foam.
According to my calculations (please find attached), I can span 1.35 m with a live load of 150 kg/m2.
Unfortunately, the Karamba structural analysis indicates that the material buckles on distances lower than 1.35 m.
Please find attached my GH script, Rhino file, and a sketch.
Apologies for the long post and thank you in advance!
Hello Yoav,
there are three problems in your definition (see attached files 190217_EPS Foam Structure Analysis_cp.gh (58.5 KB) and 190217_EPS Foam Structure_Rhino 5.3dm (103.8 KB)).
In order to solve these do the following:
1.) Flatten the output of the Materials-component, otherwise one gets multiple, partial models.
2.) Make the endpoints of the connectors vertices of the shell mesh in order to properly connect them. You can use the ‘IPts’-input of the ‘Mesh Breps’-component for that.
3.) Add rotational support conditions about the global X-axis to keep the structure from rotating out of the XZ-plane.
Thank you very much for your help, I really appreciate it.
Tim - I have been reading and embarrassed to admit that I’m very weak in that.
Can I ask for an example of how you would calculate with the given units?
Celemns - it works so much better, thank you!
May I ask why does the left interlocking connection has higher utilisation values?
Also, the top connection depicts reverse conditions (please find a screenshot attached).
Lastly, is it possible to hide the mesh grid to see the analysis results better?
When I hide the shell view the analysis disappears with
Hello Yoav,
you can find the material properties of EPS on the net.
The stress peeks could be due to the non-uniform mesh at the border between the two parts.
You can hide the mesh edges via ‘Display/Preview Mesh Edges’ in the Grasshopper menu.
Best,
Clemens
