New question #700258 on Yade:
https://answers.launchpad.net/yade/+question/700258
Hi,
I am simulating a triaxial compression test using Hertz-Mindlin model, and I'd
like to ask that if it is possible to include adhesion in Hertz-Mindline
contact model so that I can simulate bonded material (or cement material).
I read from MindlinPhys[1], there seems to be an option to set adhesion (named
adhesionForce in [1]).
#I use FrictMat:
MatSand =
O.materials.append(FrictMat(young=young,poisson=0.3,frictionAngle=radians(30),density=2650,label='sand'))
#The engines I used are as follow:
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom6D(),Ig2_Box_Sphere_ScGeom()],
[Ip2_FrictMat_FrictMat_MindlinPhys(betan=betan,betas=betas,label='ContactModel')],
[Law2_ScGeom_MindlinPhys_Mindlin(includeMoment=False,includeAdhesion=True,label='Mindlin')]
),
GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8),
triax,
TriaxialStateRecorder(iterPeriod=100,file='WallStresses'),
newton,
#PyRunner(iterPeriod=2000,command='history()',label='recorder'),
#PyRunner(command='stopIfDamaged()',iterPeriod=500),
]
#I tried to use the following command to active adhesion:
ContactModel.isAdhesive=True
ContactModel.adhesionForce=adhesion
But I didn't make the adhesion come into effect. Thereby, I'd like to ask that:
(1) How to include adhesion in Hertz-Mindline contact model if it is possible.
(2) In [1], it explains adhesionForce as "Force of adhesion as predicted by
DMT", what is DMT?
(3) Where I can find the source code of Hertz-Mindline contact model in Yade
trunk?
Thanks!
Leonard
[1]https://yade-dev.gitlab.io/trunk/yade.wrapper.html?highlight=dmt#yade.wrapper.MindlinPhys
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