Cutting geometry issues

[DrBwts]

Hi,

I'm trying to make multiple Boolean cuts from the same part.

The issue I am having is that Abaqus insists on creating a new part for every cut I make, which is making scripting this a nightmare.

My latest attempt is the following,

def createAndCutSphere(diameter, centroid, sph):
    
    # Create sphere 
    rootSphere = 'rootSphere'   # Original sphere that is to be cut
    newRoot = 'newRootSphere'   # New root instance created by cut operation
    sphName = 'Sphere'          # Sphere that is to be removed from root sphere
    radius = diameter/2.0
    mdb.models['Model-1'].ConstrainedSketch(name='__profile__', sheetSize=100.0)
    mdb.models['Model-1'].sketches['__profile__'].ConstructionLine(point1=(0.0, -50.0), point2=(0.0, 50.0))
    mdb.models['Model-1'].sketches['__profile__'].FixedConstraint(entity=mdb.models['Model-1'].sketches['__profile__'].geometry[2])
    mdb.models['Model-1'].sketches['__profile__'].Line(point1=(0.0, radius), point2=(0.0, -radius))
    mdb.models['Model-1'].sketches['__profile__'].VerticalConstraint(addUndoState=False, entity=mdb.models['Model-1'].sketches['__profile__'].geometry[3])
    mdb.models['Model-1'].sketches['__profile__'].ParallelConstraint(addUndoState=False, entity1=mdb.models['Model-1'].sketches['__profile__'].geometry[2], entity2=mdb.models['Model-1'].sketches['__profile__'].geometry[3])
    mdb.models['Model-1'].sketches['__profile__'].CoincidentConstraint(addUndoState=False, entity1=mdb.models['Model-1'].sketches['__profile__'].vertices[0], entity2=mdb.models['Model-1'].sketches['__profile__'].geometry[2])
    mdb.models['Model-1'].sketches['__profile__'].CoincidentConstraint(addUndoState=False, entity1=mdb.models['Model-1'].sketches['__profile__'].vertices[1], entity2=mdb.models['Model-1'].sketches['__profile__'].geometry[2])
    mdb.models['Model-1'].sketches['__profile__'].ArcByCenterEnds(center=(0.0, 0.0), direction=CLOCKWISE, point1=(0.0, radius), point2=(0.0, -radius))
    mdb.models['Model-1'].sketches['__profile__'].CoincidentConstraint(addUndoState=False, entity1=mdb.models['Model-1'].sketches['__profile__'].vertices[2], entity2=mdb.models['Model-1'].sketches['__profile__'].geometry[3])
    mdb.models['Model-1'].sketches['__profile__'].EqualDistanceConstraint(addUndoState=False, entity1=mdb.models['Model-1'].sketches['__profile__'].vertices[0], entity2=mdb.models['Model-1'].sketches['__profile__'].vertices[1], midpoint=mdb.models['Model-1'].sketches['__profile__'].vertices[2])
    mdb.models['Model-1'].Part(dimensionality=THREE_D, name=sphName, type=DEFORMABLE_BODY)
    mdb.models['Model-1'].parts[sphName].BaseSolidRevolve(angle=360.0, flipRevolveDirection=OFF, sketch=mdb.models['Model-1'].sketches['__profile__'])
    
    # Place sphere to be cut    
    mdb.models['Model-1'].rootAssembly.Instance(dependent=ON, name=sphName, part=mdb.models['Model-1'].parts[sphName])
    xTrans = centroid[0]
    yTrans = centroid[1]
    zTrans = centroid[2]
    mdb.models['Model-1'].rootAssembly.translate(instanceList=(sphName, ), vector=(xTrans, yTrans, zTrans))
    
    # Cut operation
    mdb.models['Model-1'].rootAssembly.InstanceFromBooleanCut(cuttingInstances=(mdb.models['Model-1'].rootAssembly.instances[sphName], ), instanceToBeCut=mdb.models['Model-1'].rootAssembly.instances[rootSphere], name=newRoot, originalInstances=DELETE)

    # Delete unwanted parts
    del mdb.models['Model-1'].parts[sphName]
    del mdb.models['Model-1'].parts[rootSphere]

    # Rename root sphere instance
    mdb.models['Model-1'].parts.changeKey(fromName=newRoot, toName=rootSphere)
    mdb.models['Model-1'].rootAssembly.regenerate()

This works exactly once! Then it stops with, KeyError: rootSphere, even though this instance is showing up in the assembly instance list.

I have been going around in circles with this. I have tried all sorts of renaming schemes but always Abaqus doesnt recognize the instances.

Any help as always much appreciated before I have to resort to destroying Abaqus for disobedience.

 

[DrBwts]

No takers on this?

 

[StefCon]

Hello,
Would it be possible to cut "all cells in bounding box" with datum planes? By searching for everything within a box, maybe you don't have to care about the names that are created.

I haven't tried it myself. :/