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