phd-scripts/Unpublished/3D_Voxel_Assign/GeoGen.py

164 lines
5.8 KiB
Python

# GrainGen V2.0
# This script generates idealised and representative meshed micro-structure geometries
# in 2-D and 3-D through the Abaqus geometry kernel. - J. Grogan, 09/06/2011
#
# Import Abaqus and External Modules
from abaqusConstants import *
from abaqus import *
import random
import subprocess
import regionToolset
import mesh
import step
import part
import interaction
import GeomModules
#
# Create Model Database
VerFile=Mdb(pathName="MStructure")
VerModel=VerFile.models['Model-1']
VerAssembly=VerModel.rootAssembly
#
# Assign Model Parameters
shape=4 # 1 - Square, 2- Hex, 3 -Dodec, 4- Voronoi
part_type=2 # 2 - Shell, 3 - Solid
dimension=2 # 2 - 2D, 3 - 3D
rad=0.00595 # Characteristic Dimension (except Voronoi)
meshsize=0.0005 # Global Mesh Seed Size
num_high=16 # Number of Grains in X-Dir
num_wide=6 # Number of Grains in Y-Dir
num_thick=1 # Number of Grains in Z-Dir
num_grains=25 # Target Number of Grains (Voronoi Only)
scalex=1. # Voronoi Part Scale X-Dir (Voronoi Only)
scaley=3.5 # Voronoi Part Scale Y-Dir (Voronoi Only)
scalez=1. # Voronoi Part Scale Z-Dir (Voronoi Only)
ana_type=1 # 1 - Crystal Plasticity, 2 - Corrosion
hard_rad=0.0 # Hardcore voronoi min. radius (Voronoi Only)
random_seed=92271 # Random seed for voronoi grain generation or random vector generation
#
# Choose Script Function - Set to 1 to activate
assemble_grains = 1 # Assemble Multiple Grains and Merge Them
boolean_cut = 1 # Perform Boolean Cut Operation
mesh_part = 1 # Mesh the Final Geometry
mat_props = 1 # Assign Material Properties
bound_conds = 1 # Generate steps and apply BCs
write_output =1 # Write Output File
post_proc = 0 # Postprocess INP file (Corrosion Only)
#
# For 2-D Solids thickness is set equal to one element
if dimension==3:
extrude_depth=rad
else:
extrude_depth=meshsize
num_thick=1
#
# Draw a Square Grain
if shape==1:
GeomModules.DrawSquare(VerModel,part_type,rad,extrude_depth)
#
# Draw a Hexagonal Grain
if shape==2:
GeomModules.DrawHexagon(VerModel,part_type,rad,extrude_depth)
#
# Draw a Dodecahedral Grain
if shape==3:
GeomModules.DrawDodec(VerModel,rad)
#
# Draw a Voronoi Tessellation
if shape==4:
if dimension==2:
maxsize=max(scalex,scaley)
GeomModules.Voronoi2D(VerModel,part_type,extrude_depth,num_grains,maxsize,hard_rad,random_seed)
else:
maxsize=max(scalex,scaley,scalez)
GeomModules.Voronoi3D(VerModel,num_grains,maxsize,hard_rad,random_seed)
#
# Assemble Base Parts
if assemble_grains==1:
if shape<=3:
VerPart=VerModel.parts['Base']
GeomModules.PatternParts(num_high,num_wide,num_thick,VerPart,rad,shape,VerModel)
#
# Make a Boolean Template
if boolean_cut==1:
if shape>1:
GeomModules.BooleanPart(VerModel,part_type,rad,extrude_depth,num_high,
num_wide,num_thick,shape,dimension,scalex,scaley,scalez)
BoolPart=VerModel.parts['Template']
#
#Perform Boolean Cut
if shape==1:
VerPart=VerModel.parts['Merged']
del VerAssembly.instances['Merged-1']
else:
VerAssembly.InstanceFromBooleanCut(name='FinalPart',
instanceToBeCut=VerAssembly.instances['Merged-1'],
cuttingInstances=(VerAssembly.instances['Template-1'], ),
originalInstances=DELETE)
del VerAssembly.instances['FinalPart-1']
VerPart=VerModel.parts['FinalPart']
#
# Mesh Part
if mesh_part==1:
if shape<3:
VerPart.setMeshControls(regions=VerPart.cells, elemShape=HEX, technique=STRUCTURED)
if shape==3:
VerPart.setMeshControls(regions=VerPart.cells, elemShape=TET, technique=FREE)
if shape==4:
if dimension==2:
VerPart.setMeshControls(regions=VerPart.cells, elemShape=HEX, technique=SWEEP,
algorithm=ADVANCING_FRONT)
else:
VerPart.setMeshControls(regions=VerPart.cells, elemShape=TET, technique=FREE)
VerPart.seedPart(size=meshsize)
VerPart.generateMesh()
#
# For Corrosion Analysis Output Part Vertices and Element Connectivity
if ana_type==2:
GeomModules.VertsConn(VerPart,dimension)
ecor=open('ecor.dat','w')
for eachface in VerPart.faces:
if len(eachface.getAdjacentFaces())<7.:
xnor=eachface.getNormal()[0]
ynor=eachface.getNormal()[1]
znor=eachface.getNormal()[2]
if (xnor==0.)and(znor==0.):
# if (ynor==1.)or(ynor==-1.):
if (ynor==1.):
ecor.write("%6.4f %6.4f %6.4f\n"%(xnor,ynor,znor))
ecor.close()
#
#Generate Materials and Sections
if mat_props==1:
GeomModules.MatGen(ana_type,VerPart,VerModel,part_type,meshsize,random_seed)
#
#Steps and Boundary Conditions
if bound_conds==1:
VerModel.ExplicitDynamicsStep(name='Corrode', previous='Initial',
massScaling=((SEMI_AUTOMATIC, MODEL, AT_BEGINNING, 0.0, 1e-06,
BELOW_MIN, 0, 0, 0.0, 0.0, 0, None), ))
VerModel.ExplicitDynamicsStep(name='Load', previous='Corrode',
timePeriod=1.)
VerModel.steps['Corrode'].Restart(numberIntervals=2,overlay=OFF,timeMarks=OFF)
VerModel.steps['Load'].Restart(numberIntervals=2,overlay=OFF, timeMarks=OFF)
VerModel.FieldOutputRequest(name='F-Output-1',
createStepName='Corrode', variables=('A', 'CSTRESS', 'LE', 'PE',
'PEEQ', 'RF', 'S', 'SDV', 'STATUS', 'U','V'), numIntervals=100)
#
#Loads and BCs
VerAssembly.Instance(name='CorPart',part=VerPart, dependent=ON)
iNodes=VerAssembly.instances['CorPart'].nodes
# GeomModules.S1BCs(iNodes,VerModel,num_high,num_wide,num_thick,shape,
# dimension,extrude_depth,rad,scalex,scaley,scalez)
#
#VerAssembly.Instance(name='CorPart',part=VerPart, dependent=ON)
#Create Job and write input file
if write_output ==1:
VerFile.Job(name='GeomGenTemp', model='Model-1', type=ANALYSIS,
explicitPrecision=SINGLE, nodalOutputPrecision=SINGLE,userSubroutine='',
parallelizationMethodExplicit=DOMAIN,numDomains=1,multiprocessingMode=DEFAULT, numCpus=1)
VerFile.jobs['GeomGenTemp'].writeInput(consistencyChecking=OFF)
#
# Perform Postprocessing for corrosion analysis
if post_proc ==1:
retcode=subprocess.call("GeomGenPost2.exe")