Learning Forum

[PneuSCP]

Hello all,

I am trying to simulate the following the Pneu-net Actuator below. For those who don't know what it is, it is an elastomeric actuator that inflates and bends from pressure being filled into these vertical structures: https://softroboticstoolkit.com/book/pneunets-bending-actuator

[peteroznewman]

nUse a Surface Coating. Open ANSYS Help and copy/paste the text below into the Address bar of the browser to read about this.nhttps://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v211/en/wb_sim/ds_surface_coating_output.html?q=surface%20coatingnn

[PneuSCP]

nnApologies for getting back to you so late. Thanks for the suggestion. I have attached some pictures of what I did.nIn the first two pictures, you'll see the bottom layer of the Pneu-Net. On the face of this, I have added a surface coating with 0.1mm thickness.nHere are my analysis settings.nFinally, I have attached my unconverged solution:nThe force residuals:nAnd finally, the Newton-Rhapson residuals:nZoomed in:nI have a lot of problems here, but was not sure where to begin. It seems that I can resume my solution from restart points? I am sure my materials, loading and the rest are right as I have tested this on a model without paper and have checked other things. Help would be greatly appreciated. Let me know if you need additional info.nKind Regardsnn

[peteroznewman]

nThere are many settings required to make Hyperelastic models converge.nHave you used all the items mentioned in this link?n/forum/discussion/18002/convergence-during-large-deflection-of-hyperelastic-materials/p1n

[PneuSCP]

I still end up around the same point with an unconverged solution. I can use KEYOPT,matid,6,1. But KEYOPT,matid,2,1 doesn't seem to work. Is there something wrong with the way I applied the surface coating? Let me know if you need any more information. Maybe I didn't mesh it correctly?.Kind Regardsn