Author Topic: Isogrid Features  (Read 91 times)

Offline Patrick

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Isogrid Features
« on: September 27, 2021, 11:19:47 AM »
Ive been studying honey combs and I-beams for along time. Now Ive started looking at isogrids due to my new large 3D printer and have some questions.

Some of you know structures and calculus better than I so once again I return to the forum.  First, the vertical ribs are the shear web and the taller the rib the more stiff. I presume the more cells also increases stiffness, but is there a simple rule to describe a good starting density of cells and height of ribs ? or can it only be evaluated with calculus ? The ribs will be 0.6 mm thick maybe 15 mm tall. (Or there about, Im not building a bridge). I guess I could try several  of your recommended densities test them and report back, and go from there.

McDonnel Douglass wrote a in depth PDF on the matter. I understand there methods of manufacture but not the heinous quantity of math they use.
Here is a Link:  https://femci.gsfc.nasa.gov/isogrid/NASA-CR-124075_Isogrid_Design.pdf

Id like to use carbon fiber fabric backed with some 3D structures as this may make more survivable parts that might encounter the ground and reduce the cost of wet layup.
If its too bright just squint more.

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Isogrid Features
« on: September 27, 2021, 11:19:47 AM »

 


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