New question #707022 on Yade:
https://answers.launchpad.net/yade/+question/707022
Hi, everyone. I have a problem with ‘JCFpmMat’.
What’s the difference between ‘JCFpmMat’ and ‘FrictMat’ if we set the
tensileStrength and cohesion to 0?
For example, there are two scripts and the difference between them (materials
and contact InteractionLoop) is as follows:
Script1:
O.materials.append(FrictMat(young = WYoung , poisson = WPoisson , frictionAngle
= radians(WFrictionAngle) , density = WDensity,label='walls'))
O.materials.append(FrictMat(young = Young , poisson = Poisson , frictionAngle =
radians(compFricDegree),density = Density,label='spheres'))
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Box_Aabb()]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom()],
[Ip2_FrictMat_FrictMat_FrictPhys()],
[Law2_ScGeom_FrictPhys_CundallStrack()]
),
GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8),
triax,
newton
]
#
#
#
Script 2:
O.materials.append(JCFpmMat(type=0,young = WYoung , poisson = WPoisson ,
frictionAngle = radians(WFrictionAngle) , density = WDensity,label='walls'))
O.materials.append(JCFpmMat(type=1,young = Young , poisson = Poisson ,
frictionAngle = radians(compFricDegree),density =
Density,tensileStrength=TENS,cohesion=COH,label='spheres'))
triax.goal1=triax.goal2=triax.goal3=-100000
setContactFriction(radians(finalFricDegree))
O.engines=[
ForceResetter(),
InsertionSortCollider([Bo1_Box_Aabb(),Bo1_Sphere_Aabb(aabbEnlargeFactor=intR,label='Saabb')]),
InteractionLoop(
[Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=intR,label='SSgeom'),Ig2_Box_Sphere_ScGeom()],
[Ip2_JCFpmMat_JCFpmMat_JCFpmPhys(cohesiveTresholdIteration=1,label='interactionPhys')],
[Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM(recordCracks=True,Key=OUT,label='interactionLaw')]),
GlobalStiffnessTimeStepper(active=1,timeStepUpdateInterval=100,timestepSafetyCoefficient=0.8),
triax,
newton
]
#
#
#
The two scripts are same except the above content. However, the results of the
two triaxal tests differed greatly.
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