pretension from bending possible?

Hi all,

Would there be a way to define a pretensioned element, like the sheet metal in that goat video, and then apply some loads that take into account the pretension from the bending of the plate?

Thanks a lot!

Replies to This Discussion

Permalink Reply by Elisa Cheung on April 19, 2015 at 9:22am

I have been trying to model pretension elements on Karamba with little success. The only thing I was able to do was applying a uniform post tension load and vary the eccentricity. However, as soon as I change the eccentricity, all the other loads (point loads, uniform line loads) change location as well.

I want to be able to vary the location of the prestress at different locations of the element without changing the location of other loadings.

Hopefully someone would be able to help us out.

Permalink Reply by Rafael Pastrana on April 20, 2015 at 3:58am

Hi Elisa,

May I wonder what do you want to simulate?

Best :)

Rafael

Permalink Reply by Elisa Cheung on April 21, 2015 at 12:46pm

Ultimately, I would like to model shells with different prestress profiles..If anyone has any experience doing this on Karamba, please let me know!

So far, I was able to get an eccentric uniform prestress to work...

I've been trying to model a pre-stress profile on a beam element using a parabolic function. Something is really odd though, I haven't exactly figured out how to do it. My logic is I should be able to model the element using an "infinite" array of points..and vary both the prestress and eccentricity on karamba at every point...

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