yade-users team mailing list archive

[Václav Šmilauer <eudoxos@xxxxxxxx>]

> I agree with that.
> My previous remark on "discrete" changes in forces was just to point out 
> that you don't define directly the increment of plastic deformation in 
> the incremental formulation. You have a total deformation 
> (elastic+plastic) even on one time increment (with non linear 
> elasto-plastic law, or with any law as soon as 
> plasticityCondition(t)!=plasticityCondition(t+dt)). It is just a 
> technical problem, not a fundamental issue. 

I was actually thinking about the concrete model, which uses total
formulation and, moreover, it stores plastic work in CpmPhys::epsPlSum
(misnomer, really stores energy), which is incremented every time there
is plastic slip.

Doesn't the problem with different plasticity condition come into play
only if you store shear force instead of strain? That would break for
non-linear elasticity...?

v