yade-users team mailing list archive

Thread
Date

Re: [Question #690521]: Exponential softening shear force after peak- model implementation

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: chanaka Udaya <question690521@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 07 May 2020 04:44:19 -0000
Reply-to: question690521@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

Question #690521 on Yade changed:
https://answers.launchpad.net/yade/+question/690521

Description changed to:
Dear all,

I'm trying to obtain an exponential softening shear behavior (damage-plasticity) after peak stress instead of Mohr-coulomb failure with cohesion which is currently implemented CPM model in Yade.
shear stress will be calculated as follows,

sigma_S= k_s*(1-D)*(Us-Us_Pl) where D is scalar damage variable and
sigma_S,Us, Us_Pl are vectors

D=1- exp(-|Us_pl|/constant);  where , |*|  : maginitude

and yield criteria is

F=|sigma_S|- Cohesion*(1-D)  ,  cohesion is scalar value say ,1e6 like
that


from yield function F, I can calculate the scalar value of plastic shear displacement, but the problem is how to update the plastic shear displacement vector?

Could you please help me to solve this issue?

-- 
You received this question notification because your team yade-users is
an answer contact for Yade.