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Re: [Question #234129]: plastic energy dissipation

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: lingran <question234129@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Aug 2013 14:11:29 -0000
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Question #234129 on Yade changed:
https://answers.launchpad.net/yade/+question/234129

    Status: Answered => Open

lingran is still having a problem:
Hi Bruno, 
Thanks for your comments. You are right and I will try my best to add law2.bendingElastEnergy() in c++ code.

But I still have several doubts.
1.	like Jan said, Why c++ is one time step earlier than python?
2.	When use Law2_ScGeom6D_CohFrictPhys_CohesionMoment() and CohFrictMat, why do we need to set both alphaKr and alphaKtw to a non-zero value, otherwise the simulation would crush?
3.	Energy is not balanced even without considering friction and moments, that means:  utils.kineticEnergy+ Emgh(sum of (i.state.mass*(i.state.pos[1]*9.81 ))+ law2.normElastEnergy()+law2.shearElastEnergy()+O.energy[‘nonviscDamp’]!=constant.. The error increases with the increasing number of particles. 

Thanks.
Best regards.
Lingran

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