Calculate radial and annular ribs

[ranas1]

Hi, im looking information about the design of radial and annular ribs ( im working with plastic )


Im trying to calculate the dimetions of ribs. but im confused. Can anybody help??, please.

attached an image.

best regrads

 

[MikeHalloran]

By hand, you can assume the radial ribs comprise a radial grillage of T-section beams that support the applied load (not stated), and iterate until the worst stress is within the capability of whatever resin you propose to use.

The annular ribs do little unless the load is not uniformly distributed (not stated).

If your CAD package has an FEA module, you can use that. I trust hand calcs more, but I'm old.

You might get better answers in our Plastics Engineering Forum.



Mike Halloran
Pembroke Pines, FL, USA

 

[ranas1]

Hi. MikeHalloran.

Thank you your answer.

I will try to find literature about this ribs and i will use the plastic forum too.

thank.


regards

 

[IRstuff]

"Im trying to calculate the dimetions of ribs"

But you have what appears to be a CAD rendering, so you already have the dimensions in the model. Or are you asking how to determine what dimensions to use? In that case, everything depends on the loading and what you're trying to achieve because you want it lighter or use less material.

TTFN
faq731-376

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