don't rely on a variable, use the array size directly

This commit is contained in:
Martin Diehl 2018-06-26 20:33:02 +02:00
parent d786ead381
commit 98cc56968e
1 changed files with 127 additions and 104 deletions

View File

@ -8,7 +8,6 @@
!! 'phase', 'texture', and 'microstucture'
!--------------------------------------------------------------------------------------------------
module material
use config
use prec, only: &
pReal, &
pInt, &
@ -352,6 +351,16 @@ subroutine material_init()
debug_material, &
debug_levelBasic, &
debug_levelExtensive
use config, only: &
crystalliteConfig, &
homogenizationConfig, &
microstructureConfig, &
phaseConfig, &
textureConfig, &
homogenization_name, &
microstructure_name, &
phase_name, &
texture_name
use mesh, only: &
mesh_maxNips, &
mesh_NcpElems, &
@ -392,44 +401,44 @@ subroutine material_init()
call material_parseTexture()
if (iand(myDebug,debug_levelBasic) /= 0_pInt) write(6,'(a)') ' Texture parsed'; flush(6)
allocate(plasticState (material_Nphase))
allocate(sourceState (material_Nphase))
do myPhase = 1,material_Nphase
allocate(plasticState (size(phaseConfig)))
allocate(sourceState (size(phaseConfig)))
do myPhase = 1,size(phaseConfig)
allocate(sourceState(myPhase)%p(phase_Nsources(myPhase)))
enddo
allocate(homogState (material_Nhomogenization))
allocate(thermalState (material_Nhomogenization))
allocate(damageState (material_Nhomogenization))
allocate(vacancyfluxState (material_Nhomogenization))
allocate(porosityState (material_Nhomogenization))
allocate(hydrogenfluxState (material_Nhomogenization))
allocate(homogState (size(homogenizationConfig)))
allocate(thermalState (size(homogenizationConfig)))
allocate(damageState (size(homogenizationConfig)))
allocate(vacancyfluxState (size(homogenizationConfig)))
allocate(porosityState (size(homogenizationConfig)))
allocate(hydrogenfluxState (size(homogenizationConfig)))
allocate(thermalMapping (material_Nhomogenization))
allocate(damageMapping (material_Nhomogenization))
allocate(vacancyfluxMapping (material_Nhomogenization))
allocate(porosityMapping (material_Nhomogenization))
allocate(hydrogenfluxMapping(material_Nhomogenization))
allocate(thermalMapping (size(homogenizationConfig)))
allocate(damageMapping (size(homogenizationConfig)))
allocate(vacancyfluxMapping (size(homogenizationConfig)))
allocate(porosityMapping (size(homogenizationConfig)))
allocate(hydrogenfluxMapping(size(homogenizationConfig)))
allocate(temperature (material_Nhomogenization))
allocate(damage (material_Nhomogenization))
allocate(vacancyConc (material_Nhomogenization))
allocate(porosity (material_Nhomogenization))
allocate(hydrogenConc (material_Nhomogenization))
allocate(temperature (size(homogenizationConfig)))
allocate(damage (size(homogenizationConfig)))
allocate(vacancyConc (size(homogenizationConfig)))
allocate(porosity (size(homogenizationConfig)))
allocate(hydrogenConc (size(homogenizationConfig)))
allocate(temperatureRate (material_Nhomogenization))
allocate(vacancyConcRate (material_Nhomogenization))
allocate(hydrogenConcRate (material_Nhomogenization))
allocate(temperatureRate (size(homogenizationConfig)))
allocate(vacancyConcRate (size(homogenizationConfig)))
allocate(hydrogenConcRate (size(homogenizationConfig)))
do m = 1_pInt,material_Nmicrostructure
do m = 1_pInt,size(microstructureConfig)
if(microstructure_crystallite(m) < 1_pInt .or. &
microstructure_crystallite(m) > material_Ncrystallite) &
microstructure_crystallite(m) > size(crystalliteConfig)) &
call IO_error(150_pInt,m,ext_msg='crystallite')
if(minval(microstructure_phase(1:microstructure_Nconstituents(m),m)) < 1_pInt .or. &
maxval(microstructure_phase(1:microstructure_Nconstituents(m),m)) > material_Nphase) &
maxval(microstructure_phase(1:microstructure_Nconstituents(m),m)) > size(phaseConfig)) &
call IO_error(150_pInt,m,ext_msg='phase')
if(minval(microstructure_texture(1:microstructure_Nconstituents(m),m)) < 1_pInt .or. &
maxval(microstructure_texture(1:microstructure_Nconstituents(m),m)) > material_Ntexture) &
maxval(microstructure_texture(1:microstructure_Nconstituents(m),m)) > size(textureConfig)) &
call IO_error(150_pInt,m,ext_msg='texture')
if(microstructure_Nconstituents(m) < 1_pInt) &
call IO_error(151_pInt,m)
@ -438,11 +447,11 @@ subroutine material_init()
debugOut: if (iand(myDebug,debug_levelExtensive) /= 0_pInt) then
write(6,'(/,a,/)') ' MATERIAL configuration'
write(6,'(a32,1x,a16,1x,a6)') 'homogenization ','type ','grains'
do h = 1_pInt,material_Nhomogenization
do h = 1_pInt,size(homogenizationConfig)
write(6,'(1x,a32,1x,a16,1x,i6)') homogenization_name(h),homogenization_type(h),homogenization_Ngrains(h)
enddo
write(6,'(/,a14,18x,1x,a11,1x,a12,1x,a13)') 'microstructure','crystallite','constituents','homogeneous'
do m = 1_pInt,material_Nmicrostructure
do m = 1_pInt,size(microstructureConfig)
write(6,'(1x,a32,1x,i11,1x,i12,1x,l13)') microstructure_name(m), &
microstructure_crystallite(m), &
microstructure_Nconstituents(m), &
@ -466,9 +475,9 @@ subroutine material_init()
allocate(mappingCrystallite (2,homogenization_maxNgrains, mesh_NcpElems),source=0_pInt)
allocate(mappingHomogenizationConst( mesh_maxNips,mesh_NcpElems),source=1_pInt)
allocate(ConstitutivePosition (material_Nphase), source=0_pInt)
allocate(HomogenizationPosition(material_Nhomogenization),source=0_pInt)
allocate(CrystallitePosition (material_Nphase), source=0_pInt)
allocate(ConstitutivePosition (size(phaseConfig)), source=0_pInt)
allocate(HomogenizationPosition(size(homogenizationConfig)),source=0_pInt)
allocate(CrystallitePosition (size(phaseConfig)), source=0_pInt)
ElemLoop:do e = 1_pInt,mesh_NcpElems
myHomog = mesh_element(3,e)
@ -485,7 +494,7 @@ subroutine material_init()
enddo ElemLoop
! hack needed to initialize field values used during constitutive and crystallite initializations
do myHomog = 1,material_Nhomogenization
do myHomog = 1,size(homogenizationConfig)
thermalMapping (myHomog)%p => mappingHomogenizationConst
damageMapping (myHomog)%p => mappingHomogenizationConst
vacancyfluxMapping (myHomog)%p => mappingHomogenizationConst
@ -519,31 +528,31 @@ subroutine material_parseHomogenization
integer(pInt) :: h
character(len=65536) :: tag
allocate(homogenization_type(material_Nhomogenization), source=HOMOGENIZATION_undefined_ID)
allocate(thermal_type(material_Nhomogenization), source=THERMAL_isothermal_ID)
allocate(damage_type (material_Nhomogenization), source=DAMAGE_none_ID)
allocate(vacancyflux_type(material_Nhomogenization), source=VACANCYFLUX_isoconc_ID)
allocate(porosity_type (material_Nhomogenization), source=POROSITY_none_ID)
allocate(hydrogenflux_type(material_Nhomogenization), source=HYDROGENFLUX_isoconc_ID)
allocate(homogenization_typeInstance(material_Nhomogenization), source=0_pInt)
allocate(thermal_typeInstance(material_Nhomogenization), source=0_pInt)
allocate(damage_typeInstance(material_Nhomogenization), source=0_pInt)
allocate(vacancyflux_typeInstance(material_Nhomogenization), source=0_pInt)
allocate(porosity_typeInstance(material_Nhomogenization), source=0_pInt)
allocate(hydrogenflux_typeInstance(material_Nhomogenization), source=0_pInt)
allocate(homogenization_Ngrains(material_Nhomogenization), source=0_pInt)
allocate(homogenization_Noutput(material_Nhomogenization), source=0_pInt)
allocate(homogenization_active(material_Nhomogenization), source=.false.) !!!!!!!!!!!!!!!
allocate(thermal_initialT(material_Nhomogenization), source=300.0_pReal)
allocate(damage_initialPhi(material_Nhomogenization), source=1.0_pReal)
allocate(vacancyflux_initialCv(material_Nhomogenization), source=0.0_pReal)
allocate(porosity_initialPhi(material_Nhomogenization), source=1.0_pReal)
allocate(hydrogenflux_initialCh(material_Nhomogenization), source=0.0_pReal)
allocate(homogenization_type(size(homogenizationConfig)), source=HOMOGENIZATION_undefined_ID)
allocate(thermal_type(size(homogenizationConfig)), source=THERMAL_isothermal_ID)
allocate(damage_type (size(homogenizationConfig)), source=DAMAGE_none_ID)
allocate(vacancyflux_type(size(homogenizationConfig)), source=VACANCYFLUX_isoconc_ID)
allocate(porosity_type (size(homogenizationConfig)), source=POROSITY_none_ID)
allocate(hydrogenflux_type(size(homogenizationConfig)), source=HYDROGENFLUX_isoconc_ID)
allocate(homogenization_typeInstance(size(homogenizationConfig)), source=0_pInt)
allocate(thermal_typeInstance(size(homogenizationConfig)), source=0_pInt)
allocate(damage_typeInstance(size(homogenizationConfig)), source=0_pInt)
allocate(vacancyflux_typeInstance(size(homogenizationConfig)), source=0_pInt)
allocate(porosity_typeInstance(size(homogenizationConfig)), source=0_pInt)
allocate(hydrogenflux_typeInstance(size(homogenizationConfig)), source=0_pInt)
allocate(homogenization_Ngrains(size(homogenizationConfig)), source=0_pInt)
allocate(homogenization_Noutput(size(homogenizationConfig)), source=0_pInt)
allocate(homogenization_active(size(homogenizationConfig)), source=.false.) !!!!!!!!!!!!!!!
allocate(thermal_initialT(size(homogenizationConfig)), source=300.0_pReal)
allocate(damage_initialPhi(size(homogenizationConfig)), source=1.0_pReal)
allocate(vacancyflux_initialCv(size(homogenizationConfig)), source=0.0_pReal)
allocate(porosity_initialPhi(size(homogenizationConfig)), source=1.0_pReal)
allocate(hydrogenflux_initialCh(size(homogenizationConfig)), source=0.0_pReal)
forall (h = 1_pInt:material_Nhomogenization) homogenization_active(h) = any(mesh_element(3,:) == h)
forall (h = 1_pInt:size(homogenizationConfig)) homogenization_active(h) = any(mesh_element(3,:) == h)
do h=1_pInt, material_Nhomogenization
do h=1_pInt, size(homogenizationConfig)
homogenization_Noutput(h) = homogenizationConfig(h)%countKeys('(output)')
tag = homogenizationConfig(h)%getString('mech')
@ -646,7 +655,7 @@ subroutine material_parseHomogenization
enddo
do h=1_pInt, material_Nhomogenization
do h=1_pInt, size(homogenizationConfig)
homogenization_typeInstance(h) = count(homogenization_type(1:h) == homogenization_type(h))
thermal_typeInstance(h) = count(thermal_type (1:h) == thermal_type (h))
damage_typeInstance(h) = count(damage_type (1:h) == damage_type (h))
@ -672,6 +681,9 @@ subroutine material_parseMicrostructure
IO_stringValue, &
IO_stringPos, &
IO_error
use config, only: &
microstructureConfig, &
microstructure_name
use mesh, only: &
mesh_element, &
mesh_NcpElems
@ -684,28 +696,28 @@ subroutine material_parseMicrostructure
character(len=65536) :: &
tag
allocate(microstructure_crystallite(material_Nmicrostructure), source=0_pInt)
allocate(microstructure_Nconstituents(material_Nmicrostructure), source=0_pInt)
allocate(microstructure_active(material_Nmicrostructure), source=.false.)
allocate(microstructure_elemhomo(material_Nmicrostructure), source=.false.)
allocate(microstructure_crystallite(size(microstructureConfig)), source=0_pInt)
allocate(microstructure_Nconstituents(size(microstructureConfig)), source=0_pInt)
allocate(microstructure_active(size(microstructureConfig)), source=.false.)
allocate(microstructure_elemhomo(size(microstructureConfig)), source=.false.)
if(any(mesh_element(4,1:mesh_NcpElems) > material_Nmicrostructure)) &
if(any(mesh_element(4,1:mesh_NcpElems) > size(microstructureConfig))) &
call IO_error(155_pInt,ext_msg='More microstructures in geometry than sections in material.config')
forall (e = 1_pInt:mesh_NcpElems) microstructure_active(mesh_element(4,e)) = .true. ! current microstructure used in model? Elementwise view, maximum N operations for N elements
do m=1_pInt, material_Nmicrostructure
do m=1_pInt, size(microstructureConfig)
microstructure_Nconstituents(m) = microstructureConfig(m)%countKeys('(constituent)')
microstructure_crystallite(m) = microstructureConfig(m)%getInt('crystallite')
microstructure_elemhomo(m) = microstructureConfig(m)%keyExists('/elementhomogeneous/')
enddo
microstructure_maxNconstituents = maxval(microstructure_Nconstituents)
allocate(microstructure_phase (microstructure_maxNconstituents,material_Nmicrostructure),source=0_pInt)
allocate(microstructure_texture (microstructure_maxNconstituents,material_Nmicrostructure),source=0_pInt)
allocate(microstructure_fraction(microstructure_maxNconstituents,material_Nmicrostructure),source=0.0_pReal)
allocate(microstructure_phase (microstructure_maxNconstituents,size(microstructureConfig)),source=0_pInt)
allocate(microstructure_texture (microstructure_maxNconstituents,size(microstructureConfig)),source=0_pInt)
allocate(microstructure_fraction(microstructure_maxNconstituents,size(microstructureConfig)),source=0.0_pReal)
do m=1_pInt, material_Nmicrostructure
do m=1_pInt, size(microstructureConfig)
str = microstructureConfig(m)%getStrings('(constituent)',raw=.true.)
do c = 1_pInt, size(str)
chunkPos = IO_stringPos(str(c))
@ -726,7 +738,7 @@ subroutine material_parseMicrostructure
enddo
enddo
do m = 1_pInt, material_Nmicrostructure
do m = 1_pInt, size(microstructureConfig)
if (dNeq(sum(microstructure_fraction(:,m)),1.0_pReal)) &
call IO_error(153_pInt,ext_msg=microstructure_name(m))
enddo
@ -738,12 +750,14 @@ end subroutine material_parseMicrostructure
!> @brief parses the crystallite part in the material configuration file
!--------------------------------------------------------------------------------------------------
subroutine material_parseCrystallite
use config, only: &
crystalliteConfig
implicit none
integer(pInt) :: c
allocate(crystallite_Noutput(material_Ncrystallite),source=0_pInt)
do c=1_pInt, material_Ncrystallite
allocate(crystallite_Noutput(size(crystalliteConfig)),source=0_pInt)
do c=1_pInt, size(crystalliteConfig)
crystallite_Noutput(c) = crystalliteConfig(c)%countKeys('(output)')
enddo
@ -758,21 +772,23 @@ subroutine material_parsePhase
IO_error, &
IO_getTag, &
IO_stringValue
use config, only: &
phaseConfig
implicit none
integer(pInt) :: sourceCtr, kinematicsCtr, stiffDegradationCtr, p
character(len=65536), dimension(:), allocatable :: str
allocate(phase_elasticity(material_Nphase),source=ELASTICITY_undefined_ID)
allocate(phase_plasticity(material_Nphase),source=PLASTICITY_undefined_ID)
allocate(phase_Nsources(material_Nphase), source=0_pInt)
allocate(phase_Nkinematics(material_Nphase), source=0_pInt)
allocate(phase_NstiffnessDegradations(material_Nphase),source=0_pInt)
allocate(phase_Noutput(material_Nphase), source=0_pInt)
allocate(phase_localPlasticity(material_Nphase), source=.false.)
allocate(phase_elasticity(size(phaseConfig)),source=ELASTICITY_undefined_ID)
allocate(phase_plasticity(size(phaseConfig)),source=PLASTICITY_undefined_ID)
allocate(phase_Nsources(size(phaseConfig)), source=0_pInt)
allocate(phase_Nkinematics(size(phaseConfig)), source=0_pInt)
allocate(phase_NstiffnessDegradations(size(phaseConfig)),source=0_pInt)
allocate(phase_Noutput(size(phaseConfig)), source=0_pInt)
allocate(phase_localPlasticity(size(phaseConfig)), source=.false.)
do p=1_pInt, material_Nphase
do p=1_pInt, size(phaseConfig)
phase_Noutput(p) = phaseConfig(p)%countKeys('(output)')
phase_Nsources(p) = phaseConfig(p)%countKeys('(source)')
phase_Nkinematics(p) = phaseConfig(p)%countKeys('(kinematics)')
@ -807,11 +823,11 @@ subroutine material_parsePhase
enddo
allocate(phase_source(maxval(phase_Nsources),material_Nphase), source=SOURCE_undefined_ID)
allocate(phase_kinematics(maxval(phase_Nkinematics),material_Nphase), source=KINEMATICS_undefined_ID)
allocate(phase_stiffnessDegradation(maxval(phase_NstiffnessDegradations),material_Nphase), &
allocate(phase_source(maxval(phase_Nsources),size(phaseConfig)), source=SOURCE_undefined_ID)
allocate(phase_kinematics(maxval(phase_Nkinematics),size(phaseConfig)), source=KINEMATICS_undefined_ID)
allocate(phase_stiffnessDegradation(maxval(phase_NstiffnessDegradations),size(phaseConfig)), &
source=STIFFNESS_DEGRADATION_undefined_ID)
do p=1_pInt, material_Nphase
do p=1_pInt, size(phaseConfig)
#if defined(__GFORTRAN__)
str = ['GfortranBug86277']
str = phaseConfig(p)%getStrings('(source)',defaultVal=str)
@ -880,10 +896,10 @@ subroutine material_parsePhase
enddo
enddo
allocate(phase_plasticityInstance(material_Nphase), source=0_pInt)
allocate(phase_elasticityInstance(material_Nphase), source=0_pInt)
allocate(phase_plasticityInstance(size(phaseConfig)), source=0_pInt)
allocate(phase_elasticityInstance(size(phaseConfig)), source=0_pInt)
do p=1_pInt, material_Nphase
do p=1_pInt, size(phaseConfig)
phase_elasticityInstance(p) = count(phase_elasticity(1:p) == phase_elasticity(p))
phase_plasticityInstance(p) = count(phase_plasticity(1:p) == phase_plasticity(p))
enddo
@ -901,6 +917,8 @@ subroutine material_parseTexture
IO_stringPos, &
IO_floatValue, &
IO_stringValue
use config, only: &
textureConfig
use math, only: &
inRad, &
math_sampleRandomOri, &
@ -913,12 +931,12 @@ subroutine material_parseTexture
integer(pInt), dimension(:), allocatable :: chunkPos
character(len=65536) :: tag
allocate(texture_ODFfile(material_Ntexture)); texture_ODFfile=''
allocate(texture_symmetry(material_Ntexture), source=1_pInt)
allocate(texture_Ngauss(material_Ntexture), source=0_pInt)
allocate(texture_Nfiber(material_Ntexture), source=0_pInt)
allocate(texture_ODFfile(size(textureConfig))); texture_ODFfile=''
allocate(texture_symmetry(size(textureConfig)), source=1_pInt)
allocate(texture_Ngauss(size(textureConfig)), source=0_pInt)
allocate(texture_Nfiber(size(textureConfig)), source=0_pInt)
do t=1_pInt, material_Ntexture
do t=1_pInt, size(textureConfig)
texture_Ngauss(t) = textureConfig(t)%countKeys('(gauss)') &
+ textureConfig(t)%countKeys('(random)')
texture_Nfiber(t) = textureConfig(t)%countKeys('(fiber)')
@ -926,12 +944,12 @@ subroutine material_parseTexture
texture_maxNgauss = maxval(texture_Ngauss)
texture_maxNfiber = maxval(texture_Nfiber)
allocate(texture_Gauss (5,texture_maxNgauss,material_Ntexture), source=0.0_pReal)
allocate(texture_Fiber (6,texture_maxNfiber,material_Ntexture), source=0.0_pReal)
allocate(texture_transformation(3,3,material_Ntexture), source=0.0_pReal)
texture_transformation = spread(math_I3,3,material_Ntexture)
allocate(texture_Gauss (5,texture_maxNgauss,size(textureConfig)), source=0.0_pReal)
allocate(texture_Fiber (6,texture_maxNfiber,size(textureConfig)), source=0.0_pReal)
allocate(texture_transformation(3,3,size(textureConfig)), source=0.0_pReal)
texture_transformation = spread(math_I3,3,size(textureConfig))
do t=1_pInt, material_Ntexture
do t=1_pInt, size(textureConfig)
section = t
gauss = 0_pInt
fiber = 0_pInt
@ -1067,6 +1085,11 @@ subroutine material_populateGrains
mesh_ipVolume, &
FE_Nips, &
FE_geomtype
use config, only: &
homogenizationConfig, &
microstructureConfig, &
homogenization_name, &
microstructure_name
use IO, only: &
IO_error, &
IO_hybridIA
@ -1103,8 +1126,8 @@ subroutine material_populateGrains
allocate(material_texture(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), source=0_pInt)
allocate(material_EulerAngles(3,homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems),source=0.0_pReal)
allocate(Ngrains(material_Nhomogenization,material_Nmicrostructure), source=0_pInt)
allocate(Nelems(material_Nhomogenization,material_Nmicrostructure), source=0_pInt)
allocate(Ngrains(size(homogenizationConfig),size(microstructureConfig)), source=0_pInt)
allocate(Nelems (size(homogenizationConfig),size(microstructureConfig)), source=0_pInt)
! populating homogenization schemes in each
!--------------------------------------------------------------------------------------------------
@ -1119,9 +1142,9 @@ subroutine material_populateGrains
micro = mesh_element(4,e)
Nelems(homog,micro) = Nelems(homog,micro) + 1_pInt
enddo
allocate(elemsOfHomogMicro(material_Nhomogenization,material_Nmicrostructure))
do homog = 1,material_Nhomogenization
do micro = 1,material_Nmicrostructure
allocate(elemsOfHomogMicro(size(homogenizationConfig),size(microstructureConfig)))
do homog = 1,size(homogenizationConfig)
do micro = 1,size(microstructureConfig)
if (Nelems(homog,micro) > 0_pInt) then
allocate(elemsOfHomogMicro(homog,micro)%p(Nelems(homog,micro)))
elemsOfHomogMicro(homog,micro)%p = 0_pInt
@ -1136,9 +1159,9 @@ subroutine material_populateGrains
t = FE_geomtype(mesh_element(2,e))
homog = mesh_element(3,e)
micro = mesh_element(4,e)
if (homog < 1_pInt .or. homog > material_Nhomogenization) & ! out of bounds
if (homog < 1_pInt .or. homog > size(homogenizationConfig)) & ! out of bounds
call IO_error(154_pInt,e,0_pInt,0_pInt)
if (micro < 1_pInt .or. micro > material_Nmicrostructure) & ! out of bounds
if (micro < 1_pInt .or. micro > size(microstructureConfig)) & ! out of bounds
call IO_error(155_pInt,e,0_pInt,0_pInt)
if (microstructure_elemhomo(micro)) then ! how many grains are needed at this element?
dGrains = homogenization_Ngrains(homog) ! only one set of Ngrains (other IPs are plain copies)
@ -1159,9 +1182,9 @@ subroutine material_populateGrains
write(6,'(/,a/)') ' MATERIAL grain population'
write(6,'(a32,1x,a32,1x,a6)') 'homogenization_name','microstructure_name','grain#'
endif
homogenizationLoop: do homog = 1_pInt,material_Nhomogenization
homogenizationLoop: do homog = 1_pInt,size(homogenizationConfig)
dGrains = homogenization_Ngrains(homog) ! grain number per material point
microstructureLoop: do micro = 1_pInt,material_Nmicrostructure ! all pairs of homog and micro
microstructureLoop: do micro = 1_pInt,size(microstructureConfig) ! all pairs of homog and micro
activePair: if (Ngrains(homog,micro) > 0_pInt) then
myNgrains = Ngrains(homog,micro) ! assign short name for total number of grains to populate
myNconstituents = microstructure_Nconstituents(micro) ! assign short name for number of constituents