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fem_model.py
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from abaqus import *
from part import *
from material import *
from section import *
from assembly import *
from step import *
from interaction import *
from load import *
from mesh import *
from optimization import *
from job import *
from sketch import *
from visualization import *
from connectorBehavior import *
import numpy as np
def model(x):
[rel_depth, t1, t2, t3] = x
project = 'waterbomb'
model_name = project + '_model'
cae_file = project + '.cae'
odb_name = project + '.odb'
# --------------------------------------------------------------------
# Fixed variable that could be implemented in the optimization, but would result in a divergence
# --------------------------------------------------------------------
n = 4
r_ext = 10.0
r_int = 1.0
size = 0.25
size2 = 0.1
quadratic = False
hyperelastic = False
hard_mat = 2410.0
soft_mat = 15.2
c_coefficient = 0.015
m = mdb.Model(modelType=STANDARD_EXPLICIT, name=model_name)
# --------------------------------------------------------------------
# part 1 - base faces
# --------------------------------------------------------------------
s = m.ConstrainedSketch(name='base', sheetSize=200.0)
s.ArcByCenterEnds(center=(0.0, 0.0), direction=COUNTERCLOCKWISE,
point1=(r_int, 0.0),
point2=(r_int * np.cos(np.pi / n), r_int * np.sin(np.pi / n)))
s.ArcByCenterEnds(center=(0.0, 0.0), direction=COUNTERCLOCKWISE,
point1=(r_ext, 0.0),
point2=(r_ext * np.cos(np.pi / n), r_ext * np.sin(np.pi / n)))
s.Line(point1=(r_int, 0.0),
point2=(r_ext, 0.0))
s.Line(point1=(r_int * np.cos(np.pi / n), r_int * np.sin(np.pi / n)),
point2=(r_ext * np.cos(np.pi / n), r_ext * np.sin(np.pi / n)))
p = m.Part(dimensionality=THREE_D, name='base', type=DEFORMABLE_BODY)
p.BaseShell(sketch=s)
p.DatumAxisByPrincipalAxis(principalAxis=YAXIS)
s1 = m.ConstrainedSketch(gridSpacing=1.0, name='__profile__', sheetSize=100.0, transform=p.MakeSketchTransform(
sketchPlane=p.faces[0],
sketchPlaneSide=SIDE1,
sketchUpEdge=p.datums[2],
sketchOrientation=RIGHT, origin=(0.0, 0.0, 0.0)))
s1.Line(point1=(r_ext * np.cos(t1 * np.pi / n), r_ext * np.sin(t1 * np.pi / n)),
point2=(r_int * np.cos(t2 * np.pi / n), r_int * np.sin(t2 * np.pi / n)))
s1.Line(point1=(r_int * np.cos(t2 * np.pi / n), r_int * np.sin(t2 * np.pi / n)),
point2=(r_ext * np.cos(t3 * np.pi / n), r_ext * np.sin(t3 * np.pi / n)))
s1.ConstructionLine(point1=(0.0, 0.0), point2=(np.cos(np.pi / n), np.sin(np.pi / n)))
p.PartitionFaceBySketch(faces=p.faces[0], sketch=s1,
sketchUpEdge=p.datums[2])
p.Set(faces=(p.faces[0:2]), name='soft')
p.Set(faces=(p.faces[:]), name='all')
p.Set(faces=(p.faces[2:3]), name='hard')
p.Set(vertices=(p.vertices[0:1]), name='block')
p.Set(vertices=(p.vertices[1:2]), name='force')
p.Set(edges=(p.edges[3:4], p.edges[5:6]), name='int')
p.Set(edges=(p.edges[1:2], p.edges[7:8]), name='ext')
p.Set(edges=(p.edges[2:3], p.edges[6:7]), name='sym')
# --------------------------------------------------------------------
# assembly
# --------------------------------------------------------------------
a = m.rootAssembly
a.Instance(dependent=ON, name='base', part=p)
csys = a.DatumCsysByThreePoints(coordSysType=CYLINDRICAL,
name='Cylindrical',
origin=(0.0, 0.0, 0.0),
point1=(1.0, 0.0, 0.0),
point2=(0.0, 1.0, 0.0))
# --------------------------------------------------------------------
# Material
# --------------------------------------------------------------------
m.Material(name='hard')
m.materials['hard'].Density(
table=((1.04e-09,),))
m.materials['hard'].Elastic(
table=((hard_mat, 0.35),))
m.Material(name='soft')
m.materials['soft'].Density(
table=((1.2e-09,),))
if not hyperelastic:
m.materials['soft'].Elastic(
table=((soft_mat, 0.45),))
else:
m.materials['soft'].Hyperelastic(materialType=ISOTROPIC, table=((c_coefficient, 0.0),), testData=OFF,
type=NEO_HOOKE, volumetricResponse=VOLUMETRIC_DATA)
# --------------------------------------------------------------------
# Section
# --------------------------------------------------------------------
m.HomogeneousShellSection(idealization=NO_IDEALIZATION,
integrationRule=SIMPSON,
material='hard',
name='hard',
nodalThicknessField='',
numIntPts=5,
poissonDefinition=DEFAULT,
preIntegrate=OFF,
temperature=GRADIENT,
thickness=0.1,
thicknessField='',
thicknessModulus=None,
thicknessType=UNIFORM,
useDensity=OFF)
m.HomogeneousShellSection(idealization=NO_IDEALIZATION,
integrationRule=SIMPSON,
material='soft',
name='soft',
nodalThicknessField='',
numIntPts=5,
poissonDefinition=DEFAULT,
preIntegrate=OFF,
temperature=GRADIENT,
thickness=0.1 * rel_depth,
thicknessField='',
thicknessModulus=None,
thicknessType=UNIFORM,
useDensity=OFF)
p.SectionAssignment(offset=0.0, offsetField='', offsetType=MIDDLE_SURFACE,
region=p.sets['hard'], sectionName='hard', thicknessAssignment=FROM_SECTION)
p.SectionAssignment(offset=0.0, offsetField='', offsetType=MIDDLE_SURFACE,
region=p.sets['soft'], sectionName='soft', thicknessAssignment=FROM_SECTION)
# --------------------------------------------------------------------
# STEP
# --------------------------------------------------------------------
# m.ExplicitDynamicsStep(improvedDtMethod=ON, maxIncrement=0.1, name='Analysis', previous='Initial')
m.ImplicitDynamicsStep(alpha=DEFAULT, amplitude=RAMP, application=QUASI_STATIC, initialConditions=OFF,
initialInc=0.001, minInc=5e-5, maxInc=0.01, maxNumInc=10000, name='Analysis', nlgeom=ON,
nohaf=OFF, previous='Initial')
m.historyOutputRequests['H-Output-1'].setValues(frequency=1)
m.fieldOutputRequests['F-Output-1'].setValues(frequency=1)
# m.StaticStep(initialInc=0.001, maxInc=0.01, maxNumInc=10000, minInc=1e-20, name='Analysis', nlgeom=ON, previous='Initial', timePeriod=2.0)
# m.StaticRiksStep(initialArcInc=0.01, maxArcInc=0.1, maxLPF=1.0, maxNumInc=10000, name='Analysis', nlgeom=ON, previous='Initial')
# --------------------------------------------------------------------
# Mesh
# --------------------------------------------------------------------
p.seedPart(deviationFactor=0.1, minSizeFactor=0.1, size=size)
p.seedEdgeBySize(constraint=FINER, deviationFactor=0.1, edges=p.sets['int'].edges, minSizeFactor=0.1, size=size2)
p.seedEdgeBySize(constraint=FINER, deviationFactor=0.1, edges=p.sets['ext'].edges, minSizeFactor=0.1, size=size2)
p.setMeshControls(elemShape=QUAD, regions=p.faces[:], technique=STRUCTURED)
if quadratic:
p.setElementType(elemTypes=(ElemType(elemCode=S8R, elemLibrary=STANDARD), ElemType(
elemCode=STRI65, elemLibrary=STANDARD)), regions=p.sets['all'])
else:
p.setElementType(elemTypes=(ElemType(elemCode=S4, elemLibrary=STANDARD), ElemType(
elemCode=S3, elemLibrary=STANDARD, secondOrderAccuracy=OFF)), regions=p.sets['all'])
p.generateMesh()
a.regenerate()
# --------------------------------------------------------------------
# Boundary conditions and loading
# --------------------------------------------------------------------
m.DisplacementBC(amplitude=UNSET,
createStepName='Analysis',
distributionType=UNIFORM,
fieldName='',
localCsys=None,
name='Displacement',
region=a.instances['base'].sets['force'],
u1=UNSET, u2=UNSET, u3=-0.8 * r_ext, ur1=UNSET, ur2=UNSET, ur3=UNSET)
m.DisplacementBC(amplitude=UNSET,
createStepName='Analysis',
distributionType=UNIFORM,
fieldName='',
localCsys=None,
name='Lock',
region=a.instances['base'].sets['block'],
u1=UNSET, u2=UNSET, u3=SET, ur1=UNSET, ur2=UNSET, ur3=SET)
m.DisplacementBC(amplitude=UNSET,
createStepName='Analysis',
distributionType=UNIFORM,
fieldName='',
localCsys=a.datums[csys.id],
name='Sym',
region=a.instances['base'].sets['sym'],
u1=UNSET, u2=SET, u3=UNSET, ur1=SET, ur2=UNSET, ur3=SET)
a.regenerate()
# --------------------------------------------------------------------
# job
# --------------------------------------------------------------------
j = mdb.Job(atTime=None, contactPrint=OFF, description='', echoPrint=OFF,
explicitPrecision=SINGLE, getMemoryFromAnalysis=True, historyPrint=OFF,
memory=90, memoryUnits=PERCENTAGE, model=model_name, modelPrint=OFF,
multiprocessingMode=DEFAULT, name=project, nodalOutputPrecision=SINGLE,
numCpus=6, numDomains=6, numGPUs=1, numThreadsPerMpiProcess=1, queue=None,
resultsFormat=ODB, scratch='', type=ANALYSIS, userSubroutine='',
waitHours=0, waitMinutes=0)
mdb.saveAs(cae_file)
j.submit()
j.waitForCompletion()
mdb.saveAs(cae_file)
odb = session.openOdb(name=odb_name)
data = session.XYDataFromHistory(name='data', odb=odb, steps=('Analysis',),
outputVariableName='Strain energy: ALLSE for Whole Model')
del mdb.models[model_name]
# --------------------------------------------------------------------
# Deformed shape
# --------------------------------------------------------------------
m2 = mdb.Model(modelType=STANDARD_EXPLICIT, name=model_name)
p3 = m2.PartFromOdb(frame=len(data) - 1, instance='BASE', name='Deformed', odb=session.openOdb(odb_name),
shape=DEFORMED, step=0)
# --------------------------------------------------------------------
# assembly
# --------------------------------------------------------------------
a = m2.rootAssembly
a.Instance(dependent=ON, name='Deformed', part=p3)
csys = a.DatumCsysByThreePoints(coordSysType=CYLINDRICAL,
name='Cylindrical',
origin=(0.0, 0.0, 0.0),
point1=(1.0, 0.0, 0.0),
point2=(0.0, 1.0, 0.0))
# --------------------------------------------------------------------
# Material
# --------------------------------------------------------------------
m2.Material(name='hard')
m2.materials['hard'].Density(
table=((1.04e-09,),))
m2.materials['hard'].Elastic(
table=((hard_mat, 0.35),))
m2.Material(name='soft')
m2.materials['soft'].Density(
table=((1.2e-09,),))
if not hyperelastic:
m2.materials['soft'].Elastic(
table=((soft_mat, 0.45),))
else:
m2.materials['soft'].Hyperelastic(materialType=ISOTROPIC, table=((c_coefficient, 0.0),), testData=OFF,
type=NEO_HOOKE, volumetricResponse=VOLUMETRIC_DATA)
# --------------------------------------------------------------------
# Section
# --------------------------------------------------------------------
m2.HomogeneousShellSection(idealization=NO_IDEALIZATION,
integrationRule=SIMPSON,
material='hard',
name='hard',
nodalThicknessField='',
numIntPts=5,
poissonDefinition=DEFAULT,
preIntegrate=OFF,
temperature=GRADIENT,
thickness=0.1,
thicknessField='',
thicknessModulus=None,
thicknessType=UNIFORM,
useDensity=OFF)
m2.HomogeneousShellSection(idealization=NO_IDEALIZATION,
integrationRule=SIMPSON,
material='soft',
name='soft',
nodalThicknessField='',
numIntPts=5,
poissonDefinition=DEFAULT,
preIntegrate=OFF,
temperature=GRADIENT,
thickness=0.1 * rel_depth,
thicknessField='',
thicknessModulus=None,
thicknessType=UNIFORM,
useDensity=OFF)
p3.SectionAssignment(offset=0.0, offsetField='', offsetType=MIDDLE_SURFACE,
region=p3.sets['HARD'], sectionName='hard', thicknessAssignment=FROM_SECTION)
p3.SectionAssignment(offset=0.0, offsetField='', offsetType=MIDDLE_SURFACE,
region=p3.sets['SOFT'], sectionName='soft', thicknessAssignment=FROM_SECTION)
# --------------------------------------------------------------------
# STEP
# --------------------------------------------------------------------
# m.ExplicitDynamicsStep(improvedDtMethod=ON, maxIncrement=0.1, name='Analysis', previous='Initial')
m2.ImplicitDynamicsStep(alpha=DEFAULT, amplitude=RAMP, application=QUASI_STATIC, initialConditions=OFF,
initialInc=0.001, minInc=5e-5, maxInc=0.01, maxNumInc=10000, name='Analysis', nlgeom=ON,
nohaf=OFF, previous='Initial')
m2.historyOutputRequests['H-Output-1'].setValues(frequency=1)
m2.fieldOutputRequests['F-Output-1'].setValues(frequency=1)
# m.StaticStep(initialInc=0.001, maxInc=0.01, maxNumInc=10000, minInc=1e-20, name='Analysis', nlgeom=ON, previous='Initial', timePeriod=2.0)
# m.StaticRiksStep(initialArcInc=0.01, maxArcInc=0.1, maxLPF=1.0, maxNumInc=10000, name='Analysis', nlgeom=ON, previous='Initial')
# --------------------------------------------------------------------
# Boundary conditions and loading
# --------------------------------------------------------------------
m2.DisplacementBC(amplitude=UNSET,
createStepName='Analysis',
distributionType=UNIFORM,
fieldName='',
localCsys=None,
name='Displacement',
region=a.instances['Deformed'].sets['FORCE'],
u1=UNSET, u2=UNSET, u3=1.6 * r_ext, ur1=UNSET, ur2=UNSET, ur3=UNSET)
m2.DisplacementBC(amplitude=UNSET,
createStepName='Analysis',
distributionType=UNIFORM,
fieldName='',
localCsys=None,
name='Lock',
region=a.instances['Deformed'].sets['BLOCK'],
u1=UNSET, u2=UNSET, u3=SET, ur1=UNSET, ur2=UNSET, ur3=SET)
m2.DisplacementBC(amplitude=UNSET,
createStepName='Analysis',
distributionType=UNIFORM,
fieldName='',
localCsys=a.datums[csys.id],
name='Sym',
region=a.instances['Deformed'].sets['SYM'],
u1=UNSET, u2=SET, u3=UNSET, ur1=SET, ur2=UNSET, ur3=SET)
a.regenerate()
# --------------------------------------------------------------------
# job
# --------------------------------------------------------------------
del mdb.jobs['waterbomb']
j = mdb.Job(atTime=None, contactPrint=OFF, description='', echoPrint=OFF,
explicitPrecision=SINGLE, getMemoryFromAnalysis=True, historyPrint=OFF,
memory=90, memoryUnits=PERCENTAGE, model=model_name, modelPrint=OFF,
multiprocessingMode=DEFAULT, name=project, nodalOutputPrecision=SINGLE,
numCpus=6, numDomains=6, numGPUs=1, numThreadsPerMpiProcess=1, queue=None,
resultsFormat=ODB, scratch='', type=ANALYSIS, userSubroutine='',
waitHours=0, waitMinutes=0)
mdb.saveAs(cae_file)
j.submit()
j.waitForCompletion()
mdb.saveAs(cae_file)