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[Jan Stránský <question197661@xxxxxxxxxxxxxxxxxxxxx>]

Question #197661 on Yade changed:
https://answers.launchpad.net/yade/+question/197661

Jan Stránský proposed the following answer:
O.load('consolidated_state_'+key+'_'+str(phi)+'.xml') # we add new 
materials to our material container 
O.materials.append(MomentMat(eta=eyta,young=young,poisson=0.1,frictionAngle=radians(fricFinal),density=2600,label='spheres-moment')) 
O.materials.append(MomentMat(eta=0.0,young=young,poisson=0.1,frictionAngle=0,density=0,label='walls-moment')) 
# here we modify the material type for i_body in O.bodies: if i_body.id 
< 6 : i_body.material = O.materials[3] else: i_body.material = 
O.materials[2] #here we move to modify the interaction loop Interaction 
= O.engines[2] Interaction = InteractionLoop( 
[Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()], 
[Ip2_MomentMat_MomentMat_MomentPhys(Knormal=knormal,Alpha = 
alpha,Beta=beta,useAlphaBeta=True,userInputStiffness=True)], 
[Law2_SCG_MomentPhys_CohesionlessMomentRotation()] )

Please send whole script.. what do you do with Interaction instance? 
O.engines is processed differently then other python objects and must be 
assigned at once, one item change has no effect [1]

Jan

[1] https://www.yade-dem.org/doc/user.html#base-engines

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