Staged Analysis?

I've been trying to work out whether it's possible to use Karamba to do some staged analysis. The image attached shows a couple of thoughts regarding where I'm going with this.

I know it's possible to create a new model from a deformed model but I'm not sure if it's possible to carry the stress state through to the next stage.

Attachments:

1970-01-01 01.00.00-45.jpg, 855 KB

Replies to This Discussion

Permalink Reply by Karamba3D on June 2, 2014 at 12:14am

In Karamba 1.0.5 it is not possible to do staged analysis. Maybe in one of the next releases.

Best,

Clemens

Permalink Reply by jjsolly on June 2, 2014 at 1:12am

Thanks for the reply Clemens... It would be really cool to be able to do this with Karamba in the future!

James

Permalink Reply by jjsolly on June 4, 2014 at 8:19am

Along a slightly similar line but less crazy..

I am playing with a pre-bent plate (very slight) that I want to force up into an arch by loading it. I have reviewed this model but it's doing something fairly odd.

Whether I use large-deformation or normal analysis, if i apply either a prescribed displacement or an end load, I seem to get an over-exaggerated arching and an increase in area of the plate.

File attached.

Any thoughts would be most welcome.

Attachments:

Plate Buckling.gh, 39 KB

Permalink Reply by Karamba3D on June 4, 2014 at 11:58am

The algorithm behind the large deformation analysis is purely incremental: It applies the load in small steps an updates the nodal positions after each step. The solution thus attained may drift from the exact one. How much is the increase in area in percent?

You could try the following:

- increase the number of iterations ('Inc' input-plug on LaDeform)

- switch from load-control to deformation control. The latter can be done by feeding the maximum target displacement into the 'MaxDisp' input-plug.

Best,

Clemens

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