yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

> So - what exactly happens when the contact breaks? The plastic energy
> is changing into kinetic energy???
Nope, it's removed from the system (and in turn, stored in total 
dissipated energy, letting us check conservation).

>  Look at the elastic energy, it's
> almost zero, how is it possible that kinetic energy is increasing?
>   
Thats right, kinetic should never increase with this script.

> To conclude, I suppose that this formula:
>
> 	plasticDissipation +=
> 	((1/currentContactPhysics->ks)*(trialForce-shearForce))//plastic disp.
> 	.dot(shearForce);//active force
>
> is correct only when plasticDissipation increases. But totally
> ignores the case when it decreases.
>
>   
Plastic dissipation can never decrease, you can't recover dissipated energy.

Bruno