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[Jan Stránský <question250860@xxxxxxxxxxxxxxxxxxxxx>]

Question #250860 on Yade changed:
https://answers.launchpad.net/yade/+question/250860

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hi Behzad,
sorry for late answer. Yes, you are right, the trunk version of Cpm model
does not have creep.
cheers
Jan



2014-06-27 16:47 GMT+02:00 behzad <question250860@xxxxxxxxxxxxxxxxxxxxx>:

> New question #250860 on Yade:
> https://answers.launchpad.net/yade/+question/250860
>
> Hi,
>
> The material model of CpmMat cannot have creep, right?
> This is not supposed to be viscoelastic?
>
>
> ==========================
>
> from yade import utils, plot
> from yade import pack, qt
>
>
> bMat=O.materials.append(CpmMat(young=12e5,frictionAngle=.8,poisson=.2,density=3800,sigmaT=0.0,relDuctility=2,neverDamage=False,
> epsCrackOnset=5e-2,isoPrestress=0))
>
>
>
>
> id_Mat2=O.materials.append(FrictMat(young=1e10,poisson=0.3,density=1000,frictionAngle=1))
> Rigid=O.materials[id_Mat2]
>
>
> s1=utils.sphere([0.0,0.0,1.0],1.0,fixed=True,material=bMat)
> s2=utils.sphere([0.0,0.0,3.0],1.0,fixed=False,material=bMat)
>
> O.bodies.append(s1)
> O.bodies.append(s2)
>
> box_1 = O.bodies.append(box((0,0,0),(1,1,.001),fixed=True,material=Rigid))
>
>
> O.engines=[
> ForceResetter(),
> InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]),
> InteractionLoop(
> [Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()],
> [Ip2_CpmMat_CpmMat_CpmPhys(), Ip2_FrictMat_CpmMat_FrictPhys()],
>
> [Law2_ScGeom_CpmPhys_Cpm(omegaThreshold=0.5),Law2_ScGeom_FrictPhys_CundallStrack()],
> ),
> NewtonIntegrator(damping=0.7,gravity=[0,0,-10]),
> PyRunner(command='AutoData()',iterPeriod=1000)
> ]
>
>
>
> O.forces.addF(1,(0,0,2.21e5),permanent=True)
> qt.View()
>
>
> def AutoData():
>   i = O.interactions[0,1]
>   plot.addData(
>     d=O.bodies[1].state.pos[2]-3.0,
>     F=i.phys.normalForce.norm())
>
>
> plot.plots={'d':('F')}
> plot.plot()
>
> ===============
>
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