Re: [Yade-dev] New Material and new contact law

2010-11-26 Thread Bruno Chareyre 

 I have to implement a simple contact law which considers normal tensile force 
 only but elasto-plastic behaviour (steel wire). Once the connection breaks 
 there is no more interaction. Any idea if there is already something similar 
 in the code? 

I was planning to do something similar.
I just added tensile plasticity in Law2_ScGeom6D_CohFrictPhys_CohesionMoment, 
see last
commit - r2577 (for instance here : 
http://bazaar.launchpad.net/~yade-dev/yade/trunk/changes).
It is not yet completely implemented : it needs to add plasticity parameters 
plasticUn and
plasticUnMax in CohFrict material.
You could use it with all stifnesses=0 but the normal one. It would still 
generate elastic
compressive forces for the moment however.

Cheers.

Bruno

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[Yade-dev] New Material and new contact law

2010-11-25 Thread Klaus Thoeni 
Hi Guys!

I have to implement a simple contact law which considers normal tensile force 
only but elasto-plastic behaviour (steel wire). Once the connection breaks 
there is no more interaction. Any idea if there is already something similar 
in the code? 

Any suggestion how to start? I was thinking to create a new material 
ElPlastMat. Makes it sense or not?

I am still not really familiar with the code. So I appreciate any kind of 
help.

Thanks

Klaus

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