632 lines
28 KiB
Fortran
632 lines
28 KiB
Fortran
! Copyright 2011 Max-Planck-Institut für Eisenforschung GmbH
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!
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! This file is part of DAMASK,
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! the Düsseldorf Advanced MAterial Simulation Kit.
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!
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! DAMASK is free software: you can redistribute it and/or modify
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! it under the terms of the GNU General Public License as published by
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! the Free Software Foundation, either version 3 of the License, or
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! (at your option) any later version.
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!
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! DAMASK is distributed in the hope that it will be useful,
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! but WITHOUT ANY WARRANTY; without even the implied warranty of
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! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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! GNU General Public License for more details.
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!
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! You should have received a copy of the GNU General Public License
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! along with DAMASK. If not, see <http://www.gnu.org/licenses/>.
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!
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!##############################################################
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!* $Id$
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!*****************************************************
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!* Module: CONSTITUTIVE_J2 *
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!*****************************************************
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!* contains: *
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!* - constitutive equations *
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!* - parameters definition *
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!*****************************************************
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! [Alu]
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! plasticity j2
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! (output) flowstress
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! (output) strainrate
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! c11 110.9e9 # (3 C11 + 2 C12 + 2 C44) / 5 ... with C44 = C11-C12 !!
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! c12 58.34e9 # (1 C11 + 4 C12 - 1 C44) / 5
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! taylorfactor 3
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! tau0 31e6
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! gdot0 0.001
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! n 20
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! h0 75e6
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! tausat 63e6
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! a 2.25
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module constitutive_j2
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use prec, only: pReal,pInt
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implicit none
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private
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character (len=*), parameter, public :: constitutive_j2_label = 'j2'
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integer(pInt), dimension(:), allocatable, public :: &
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constitutive_j2_sizeDotState, &
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constitutive_j2_sizeState, &
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constitutive_j2_sizePostResults
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integer(pInt), dimension(:,:), allocatable, target, public :: &
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constitutive_j2_sizePostResult ! size of each post result output
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character(len=64), dimension(:,:), allocatable, target, public :: &
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constitutive_j2_output ! name of each post result output
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integer(pInt), dimension(:), allocatable, private :: &
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constitutive_j2_Noutput
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real(pReal), dimension(:), allocatable, private :: &
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constitutive_j2_C11, &
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constitutive_j2_C12, &
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!* Visco-plastic constitutive_j2 parameters
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constitutive_j2_fTaylor, &
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constitutive_j2_tau0, &
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constitutive_j2_gdot0, &
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constitutive_j2_n, &
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!* h0 as function of h0 = A + B log (gammadot)
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constitutive_j2_h0, &
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constitutive_j2_h0_slopeLnRate, &
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constitutive_j2_tausat, &
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constitutive_j2_a, &
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constitutive_j2_aTolResistance, &
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!* Parameters of normalized strain rate vs. stress function:
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!* tausat += (asinh((gammadot / SinhFitA)**(1 / SinhFitD)))**(1 / SinhFitC) / (SinhFitB * (gammadot / gammadot0)**(1/n))
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constitutive_j2_tausat_SinhFitA, &
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constitutive_j2_tausat_SinhFitB, &
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constitutive_j2_tausat_SinhFitC, &
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constitutive_j2_tausat_SinhFitD
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real(pReal), dimension(:,:,:), allocatable, private :: &
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constitutive_j2_Cslip_66
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public :: constitutive_j2_init, &
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constitutive_j2_stateInit, &
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constitutive_j2_aTolState, &
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constitutive_j2_homogenizedC, &
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constitutive_j2_microstructure, &
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constitutive_j2_LpAndItsTangent, &
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constitutive_j2_dotState, &
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constitutive_j2_dotTemperature, &
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constitutive_j2_postResults
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contains
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subroutine constitutive_j2_init(myFile)
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!**************************************
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!* Module initialization *
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!**************************************
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use, intrinsic :: iso_fortran_env ! to get compiler_version and compiler_options (at least for gfortran 4.6 at the moment)
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use math, only: &
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math_Mandel3333to66, &
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math_Voigt66to3333
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use IO, only: &
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IO_lc, &
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IO_getTag, &
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IO_isBlank, &
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IO_stringPos, &
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IO_stringValue, &
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IO_floatValue, &
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IO_error
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use material
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use debug, only: &
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debug_what, &
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debug_constitutive, &
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debug_levelBasic
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implicit none
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integer(pInt), intent(in) :: myFile
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integer(pInt), parameter :: maxNchunks = 7_pInt
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integer(pInt), dimension(1_pInt+2_pInt*maxNchunks) :: positions
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integer(pInt) :: section = 0_pInt, maxNinstance, i,j,k, mySize
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character(len=64) :: tag
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character(len=1024) :: line
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!$OMP CRITICAL (write2out)
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write(6,*)
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write(6,*) '<<<+- constitutive_',trim(constitutive_j2_label),' init -+>>>'
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write(6,*) '$Id$'
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#include "compilation_info.f90"
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!$OMP END CRITICAL (write2out)
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maxNinstance = int(count(phase_plasticity == constitutive_j2_label),pInt)
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if (maxNinstance == 0_pInt) return
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if (iand(debug_what(debug_constitutive),debug_levelBasic) /= 0_pInt) then
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!$OMP CRITICAL (write2out)
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write(6,'(a16,1x,i5)') '# instances:',maxNinstance
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write(6,*)
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!$OMP END CRITICAL (write2out)
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endif
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allocate(constitutive_j2_sizeDotState(maxNinstance))
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constitutive_j2_sizeDotState = 0_pInt
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allocate(constitutive_j2_sizeState(maxNinstance))
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constitutive_j2_sizeState = 0_pInt
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allocate(constitutive_j2_sizePostResults(maxNinstance))
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constitutive_j2_sizePostResults = 0_pInt
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allocate(constitutive_j2_sizePostResult(maxval(phase_Noutput), maxNinstance))
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constitutive_j2_sizePostResult = 0_pInt
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allocate(constitutive_j2_output(maxval(phase_Noutput), maxNinstance))
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constitutive_j2_output = ''
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allocate(constitutive_j2_Noutput(maxNinstance))
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constitutive_j2_Noutput = 0_pInt
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allocate(constitutive_j2_C11(maxNinstance))
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constitutive_j2_C11 = 0.0_pReal
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allocate(constitutive_j2_C12(maxNinstance))
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constitutive_j2_C12 = 0.0_pReal
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allocate(constitutive_j2_Cslip_66(6,6,maxNinstance))
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constitutive_j2_Cslip_66 = 0.0_pReal
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allocate(constitutive_j2_fTaylor(maxNinstance))
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constitutive_j2_fTaylor = 0.0_pReal
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allocate(constitutive_j2_tau0(maxNinstance))
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constitutive_j2_tau0 = 0.0_pReal
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allocate(constitutive_j2_gdot0(maxNinstance))
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constitutive_j2_gdot0 = 0.0_pReal
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allocate(constitutive_j2_n(maxNinstance))
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constitutive_j2_n = 0.0_pReal
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allocate(constitutive_j2_h0(maxNinstance))
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constitutive_j2_h0 = 0.0_pReal
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allocate(constitutive_j2_tausat(maxNinstance))
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constitutive_j2_tausat = 0.0_pReal
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allocate(constitutive_j2_a(maxNinstance))
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constitutive_j2_a = 0.0_pReal
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allocate(constitutive_j2_aTolResistance(maxNinstance))
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constitutive_j2_aTolResistance = 0.0_pReal
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allocate(constitutive_j2_tausat_SinhFitA(maxNinstance))
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constitutive_j2_tausat_SinhFitA = 0.0_pReal
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allocate(constitutive_j2_tausat_SinhFitB(maxNinstance))
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constitutive_j2_tausat_SinhFitB = 0.0_pReal
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allocate(constitutive_j2_tausat_SinhFitC(maxNinstance))
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constitutive_j2_tausat_SinhFitC = 0.0_pReal
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allocate(constitutive_j2_tausat_SinhFitD(maxNinstance))
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constitutive_j2_tausat_SinhFitD = 0.0_pReal
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rewind(myFile)
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do while (IO_lc(IO_getTag(line,'<','>')) /= 'phase') ! wind forward to <phase>
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read(myFile,'(a1024)',END=100) line
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enddo
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do ! read thru sections of phase part
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read(myFile,'(a1024)',END=100) line
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if (IO_isBlank(line)) cycle ! skip empty lines
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if (IO_getTag(line,'<','>') /= '') exit ! stop at next part
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if (IO_getTag(line,'[',']') /= '') then ! next section
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section = section + 1_pInt ! advance section counter
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cycle
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endif
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if (section > 0_pInt .and. phase_plasticity(section) == constitutive_j2_label) then ! one of my sections
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i = phase_plasticityInstance(section) ! which instance of my plasticity is present phase
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positions = IO_stringPos(line,maxNchunks)
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tag = IO_lc(IO_stringValue(line,positions,1_pInt)) ! extract key
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select case(tag)
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case ('plasticity','elasticity')
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cycle
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case ('(output)')
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constitutive_j2_Noutput(i) = constitutive_j2_Noutput(i) + 1_pInt
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constitutive_j2_output(constitutive_j2_Noutput(i),i) = IO_lc(IO_stringValue(line,positions,2_pInt))
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case ('c11')
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constitutive_j2_C11(i) = IO_floatValue(line,positions,2_pInt)
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case ('c12')
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constitutive_j2_C12(i) = IO_floatValue(line,positions,2_pInt)
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case ('tau0')
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constitutive_j2_tau0(i) = IO_floatValue(line,positions,2_pInt)
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case ('gdot0')
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constitutive_j2_gdot0(i) = IO_floatValue(line,positions,2_pInt)
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case ('n')
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constitutive_j2_n(i) = IO_floatValue(line,positions,2_pInt)
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case ('h0')
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constitutive_j2_h0(i) = IO_floatValue(line,positions,2_pInt)
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case ('h0_slope','slopeLnRate')
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constitutive_j2_h0_slopeLnRate(i) = IO_floatValue(line,positions,2)
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case ('tausat')
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constitutive_j2_tausat(i) = IO_floatValue(line,positions,2_pInt)
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case ('tausat_sinhfita')
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constitutive_j2_tausat_SinhFitA(i) = IO_floatValue(line,positions,2)
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case ('tausat_sinhfitb')
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constitutive_j2_tausat_SinhFitB(i) = IO_floatValue(line,positions,2)
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case ('tausat_sinhfitc')
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constitutive_j2_tausat_SinhFitC(i) = IO_floatValue(line,positions,2)
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case ('tausat_sinhfitd')
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constitutive_j2_tausat_SinhFitD(i) = IO_floatValue(line,positions,2)
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case ('a', 'w0')
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constitutive_j2_a(i) = IO_floatValue(line,positions,2_pInt)
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case ('taylorfactor')
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constitutive_j2_fTaylor(i) = IO_floatValue(line,positions,2_pInt)
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case ('atol_resistance')
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constitutive_j2_aTolResistance(i) = IO_floatValue(line,positions,2_pInt)
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case default
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call IO_error(210_pInt,ext_msg=tag)
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end select
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endif
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enddo
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100 do i = 1_pInt,maxNinstance ! sanity checks
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if (constitutive_j2_tau0(i) < 0.0_pReal) call IO_error(211_pInt,ext_msg='tau0')
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if (constitutive_j2_gdot0(i) <= 0.0_pReal) call IO_error(211_pInt,ext_msg='gdot0')
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if (constitutive_j2_n(i) <= 0.0_pReal) call IO_error(211_pInt,ext_msg='n')
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if (constitutive_j2_tausat(i) <= 0.0_pReal) call IO_error(211_pInt,ext_msg='tausat')
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if (constitutive_j2_a(i) <= 0.0_pReal) call IO_error(211_pInt,ext_msg='a')
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if (constitutive_j2_fTaylor(i) <= 0.0_pReal) call IO_error(211_pInt,ext_msg='taylorfactor')
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if (constitutive_j2_aTolResistance(i) <= 0.0_pReal) call IO_error(211_pInt,ext_msg='aTol_resistance')
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enddo
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do i = 1_pInt,maxNinstance
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do j = 1_pInt,constitutive_j2_Noutput(i)
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select case(constitutive_j2_output(j,i))
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case('flowstress')
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mySize = 1_pInt
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case('strainrate')
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mySize = 1_pInt
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case default
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call IO_error(212_pInt,ext_msg=constitutive_j2_output(j,i))
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end select
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if (mySize > 0_pInt) then ! any meaningful output found
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constitutive_j2_sizePostResult(j,i) = mySize
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constitutive_j2_sizePostResults(i) = &
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constitutive_j2_sizePostResults(i) + mySize
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endif
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enddo
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constitutive_j2_sizeDotState(i) = 1_pInt
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constitutive_j2_sizeState(i) = 1_pInt
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forall(k=1_pInt:3_pInt)
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forall(j=1_pInt:3_pInt)
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constitutive_j2_Cslip_66(k,j,i) = constitutive_j2_C12(i)
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end forall
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constitutive_j2_Cslip_66(k,k,i) = constitutive_j2_C11(i)
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constitutive_j2_Cslip_66(k+3,k+3,i) = 0.5_pReal*(constitutive_j2_C11(i)-constitutive_j2_C12(i))
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end forall
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constitutive_j2_Cslip_66(1:6,1:6,i) = &
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math_Mandel3333to66(math_Voigt66to3333(constitutive_j2_Cslip_66(1:6,1:6,i)))
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enddo
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end subroutine constitutive_j2_init
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!*********************************************************************
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!* initial microstructural state *
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!*********************************************************************
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pure function constitutive_j2_stateInit(myInstance)
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implicit none
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integer(pInt), intent(in) :: myInstance
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real(pReal), dimension(1) :: constitutive_j2_stateInit
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constitutive_j2_stateInit = constitutive_j2_tau0(myInstance)
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end function constitutive_j2_stateInit
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!*********************************************************************
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!* relevant microstructural state *
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!*********************************************************************
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pure function constitutive_j2_aTolState(myInstance)
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implicit none
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!*** input variables
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integer(pInt), intent(in) :: myInstance ! number specifying the current instance of the plasticity
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!*** output variables
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real(pReal), dimension(constitutive_j2_sizeState(myInstance)) :: &
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constitutive_j2_aTolState ! relevant state values for the current instance of this plasticity
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constitutive_j2_aTolState = constitutive_j2_aTolResistance(myInstance)
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end function constitutive_j2_aTolState
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function constitutive_j2_homogenizedC(state,ipc,ip,el)
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!*********************************************************************
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!* homogenized elacticity matrix *
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!* INPUT: *
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!* - state : state variables *
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!* - ipc : component-ID of current integration point *
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!* - ip : current integration point *
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!* - el : current element *
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!*********************************************************************
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use prec, only: p_vec
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use mesh, only: mesh_NcpElems,mesh_maxNips
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use material, only: homogenization_maxNgrains,material_phase, phase_plasticityInstance
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implicit none
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integer(pInt), intent(in) :: ipc,ip,el
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integer(pInt) :: matID
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real(pReal), dimension(6,6) :: constitutive_j2_homogenizedC
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type(p_vec), dimension(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems) :: state
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matID = phase_plasticityInstance(material_phase(ipc,ip,el))
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constitutive_j2_homogenizedC = constitutive_j2_Cslip_66(1:6,1:6,matID)
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end function constitutive_j2_homogenizedC
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subroutine constitutive_j2_microstructure(Temperature,state,ipc,ip,el)
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!*********************************************************************
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!* calculate derived quantities from state (not used here) *
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!* INPUT: *
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!* - Tp : temperature *
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!* - ipc : component-ID of current integration point *
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!* - ip : current integration point *
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!* - el : current element *
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!*********************************************************************
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use prec, only: p_vec
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use mesh, only: mesh_NcpElems,mesh_maxNips
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use material, only: homogenization_maxNgrains,material_phase, phase_plasticityInstance
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implicit none
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!* Definition of variables
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integer(pInt) ipc,ip,el, matID
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real(pReal) Temperature
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type(p_vec), dimension(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems) :: state
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matID = phase_plasticityInstance(material_phase(ipc,ip,el))
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end subroutine constitutive_j2_microstructure
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!****************************************************************
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!* calculates plastic velocity gradient and its tangent *
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!****************************************************************
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pure subroutine constitutive_j2_LpAndItsTangent(Lp, dLp_dTstar_99, Tstar_dev_v, Temperature, state, g, ip, el)
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!*** variables and functions from other modules ***!
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use prec, only: p_vec
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use math, only: math_mul6x6, &
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math_Mandel6to33, &
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math_Plain3333to99
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use mesh, only: mesh_NcpElems, &
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mesh_maxNips
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use material, only: homogenization_maxNgrains, &
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material_phase, &
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phase_plasticityInstance
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implicit none
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!*** input variables ***!
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real(pReal), dimension(6), intent(in):: Tstar_dev_v ! deviatoric part of the 2nd Piola Kirchhoff stress tensor in Mandel notation
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real(pReal), intent(in):: Temperature
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integer(pInt), intent(in):: g, & ! grain number
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ip, & ! integration point number
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el ! element number
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type(p_vec), dimension(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in):: state ! state of the current microstructure
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!*** output variables ***!
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real(pReal), dimension(3,3), intent(out) :: Lp ! plastic velocity gradient
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real(pReal), dimension(9,9), intent(out) :: dLp_dTstar_99 ! derivative of Lp with respect to Tstar (9x9 matrix)
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!*** local variables ***!
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real(pReal), dimension(3,3) :: Tstar_dev_33 ! deviatoric part of the 2nd Piola Kirchhoff stress tensor as 2nd order tensor
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real(pReal), dimension(3,3,3,3) :: dLp_dTstar_3333 ! derivative of Lp with respect to Tstar as 4th order tensor
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real(pReal) gamma_dot, & ! strainrate
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norm_Tstar_dev, & ! euclidean norm of Tstar_dev
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squarenorm_Tstar_dev ! square of the euclidean norm of Tstar_dev
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|
integer(pInt) matID, &
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|
k, &
|
|
l, &
|
|
m, &
|
|
n
|
|
|
|
matID = phase_plasticityInstance(material_phase(g,ip,el))
|
|
|
|
! convert Tstar to matrix and calculate euclidean norm
|
|
Tstar_dev_33 = math_Mandel6to33(Tstar_dev_v)
|
|
squarenorm_Tstar_dev = math_mul6x6(Tstar_dev_v,Tstar_dev_v)
|
|
norm_Tstar_dev = sqrt(squarenorm_Tstar_dev)
|
|
|
|
! Initialization of Lp and dLp_dTstar
|
|
Lp = 0.0_pReal
|
|
dLp_dTstar_99 = 0.0_pReal
|
|
|
|
! for Tstar==0 both Lp and dLp_dTstar are zero (if not n==1)
|
|
if (norm_Tstar_dev > 0_pInt) then
|
|
|
|
! Calculation of gamma_dot
|
|
gamma_dot = constitutive_j2_gdot0(matID) * ( sqrt(1.5_pReal) * norm_Tstar_dev &
|
|
/ &!---------------------------------------------------
|
|
(constitutive_j2_fTaylor(matID) * state(g,ip,el)%p(1)) ) **constitutive_j2_n(matID)
|
|
|
|
! Calculation of Lp
|
|
Lp = Tstar_dev_33/norm_Tstar_dev * gamma_dot/constitutive_j2_fTaylor(matID)
|
|
|
|
!* Calculation of the tangent of Lp
|
|
forall (k=1_pInt:3_pInt,l=1_pInt:3_pInt,m=1_pInt:3_pInt,n=1_pInt:3_pInt) &
|
|
dLp_dTstar_3333(k,l,m,n) = (constitutive_j2_n(matID)-1.0_pReal) * Tstar_dev_33(k,l)*Tstar_dev_33(m,n) / squarenorm_Tstar_dev
|
|
forall (k=1_pInt:3_pInt,l=1_pInt:3_pInt) &
|
|
dLp_dTstar_3333(k,l,k,l) = dLp_dTstar_3333(k,l,k,l) + 1.0_pReal
|
|
dLp_dTstar_99 = math_Plain3333to99(gamma_dot / constitutive_j2_fTaylor(matID) * dLp_dTstar_3333 / norm_Tstar_dev)
|
|
end if
|
|
|
|
end subroutine constitutive_j2_LpAndItsTangent
|
|
|
|
|
|
!****************************************************************
|
|
!* calculates the rate of change of microstructure *
|
|
!****************************************************************
|
|
pure function constitutive_j2_dotState(Tstar_v, Temperature, state, g, ip, el)
|
|
|
|
use prec, only: &
|
|
p_vec
|
|
use math, only: &
|
|
math_mul6x6
|
|
use mesh, only: &
|
|
mesh_NcpElems, &
|
|
mesh_maxNips
|
|
use material, only: &
|
|
homogenization_maxNgrains, &
|
|
material_phase, &
|
|
phase_plasticityInstance
|
|
|
|
implicit none
|
|
!*** input variables ***!
|
|
real(pReal), dimension(6), intent(in) :: Tstar_v ! 2nd Piola Kirchhoff stress tensor in Mandel notation
|
|
real(pReal), intent(in) :: Temperature
|
|
integer(pInt), intent(in):: g, & ! grain number
|
|
ip, & ! integration point number
|
|
el ! element number
|
|
type(p_vec), dimension(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in) :: state ! state of the current microstructure
|
|
|
|
!*** output variables ***!
|
|
real(pReal), dimension(1) :: constitutive_j2_dotState ! evolution of state variable
|
|
|
|
!*** local variables ***!
|
|
real(pReal), dimension(6) :: Tstar_dev_v ! deviatoric part of the 2nd Piola Kirchhoff stress tensor in Mandel notation
|
|
real(pReal) gamma_dot, & ! strainrate
|
|
hardening, & ! hardening coefficient
|
|
saturation, & ! saturation resistance
|
|
norm_Tstar_dev ! euclidean norm of Tstar_dev
|
|
integer(pInt) matID
|
|
|
|
matID = phase_plasticityInstance(material_phase(g,ip,el))
|
|
|
|
! deviatoric part of 2nd Piola-Kirchhoff stress
|
|
Tstar_dev_v(1:3) = Tstar_v(1:3) - sum(Tstar_v(1:3))/3.0_pReal
|
|
Tstar_dev_v(4:6) = Tstar_v(4:6)
|
|
|
|
norm_Tstar_dev = sqrt(math_mul6x6(Tstar_dev_v,Tstar_dev_v))
|
|
|
|
! gamma_dot
|
|
gamma_dot = constitutive_j2_gdot0(matID) * ( sqrt(1.5_pReal) * norm_Tstar_dev &
|
|
/ &!---------------------------------------------------
|
|
(constitutive_j2_fTaylor(matID) * state(g,ip,el)%p(1)) ) ** constitutive_j2_n(matID)
|
|
|
|
! hardening coefficient
|
|
if (abs(gamma_dot) > 1e-12_pReal) then
|
|
if (constitutive_j2_tausat_SinhFitA(matID) == 0) then
|
|
saturation = constitutive_j2_tausat(matID)
|
|
else
|
|
saturation = ( constitutive_j2_tausat(matID) &
|
|
+ ( log( ( gamma_dot / constitutive_j2_tausat_SinhFitA(matID)&
|
|
)**(1.0_pReal / constitutive_j2_tausat_SinhFitD(matID))&
|
|
+ sqrt( ( gamma_dot / constitutive_j2_tausat_SinhFitA(matID) &
|
|
)**(2.0_pReal / constitutive_j2_tausat_SinhFitD(matID)) &
|
|
+ 1.0_pReal ) &
|
|
) & ! asinh(K) = ln(K + sqrt(K^2 +1))
|
|
)**(1.0_pReal / constitutive_j2_tausat_SinhFitC(matID)) &
|
|
/ ( constitutive_j2_tausat_SinhFitB(matID) &
|
|
* (gamma_dot / constitutive_j2_gdot0(matID))**(1.0_pReal / constitutive_j2_n(matID)) &
|
|
) &
|
|
)
|
|
endif
|
|
hardening = ( constitutive_j2_h0(matID) + constitutive_j2_h0_slopeLnRate(matID) * log(gamma_dot) ) &
|
|
* abs( 1.0_pReal - state(g,ip,el)%p(1)/saturation )**constitutive_j2_a(matID) &
|
|
* sign(1.0_pReal, 1.0_pReal - state(g,ip,el)%p(1)/saturation)
|
|
else
|
|
hardening = 0.0_pReal
|
|
endif
|
|
|
|
! dotState
|
|
constitutive_j2_dotState = hardening * gamma_dot
|
|
|
|
end function constitutive_j2_dotState
|
|
|
|
|
|
!****************************************************************
|
|
!* calculates the rate of change of temperature *
|
|
!****************************************************************
|
|
pure function constitutive_j2_dotTemperature(Tstar_v, Temperature, state, g, ip, el)
|
|
|
|
!*** variables and functions from other modules ***!
|
|
use prec, only: p_vec
|
|
use mesh, only: mesh_NcpElems,mesh_maxNips
|
|
use material, only: homogenization_maxNgrains
|
|
|
|
implicit none
|
|
!*** input variables ***!
|
|
real(pReal), dimension(6), intent(in) :: Tstar_v ! 2nd Piola Kirchhoff stress tensor in Mandel notation
|
|
real(pReal), intent(in) :: Temperature
|
|
integer(pInt), intent(in):: g, & ! grain number
|
|
ip, & ! integration point number
|
|
el ! element number
|
|
type(p_vec), dimension(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in) :: state ! state of the current microstructure
|
|
|
|
!*** output variables ***!
|
|
real(pReal) constitutive_j2_dotTemperature ! rate of change of temperature
|
|
|
|
! calculate dotTemperature
|
|
constitutive_j2_dotTemperature = 0.0_pReal
|
|
|
|
end function constitutive_j2_dotTemperature
|
|
|
|
|
|
!*********************************************************************
|
|
!* return array of constitutive results *
|
|
!*********************************************************************
|
|
pure function constitutive_j2_postResults(Tstar_v, Temperature, dt, state, g, ip, el)
|
|
|
|
!*** variables and functions from other modules ***!
|
|
use prec, only: p_vec
|
|
use math, only: math_mul6x6
|
|
use mesh, only: mesh_NcpElems, &
|
|
mesh_maxNips
|
|
use material, only: homogenization_maxNgrains, &
|
|
material_phase, &
|
|
phase_plasticityInstance, &
|
|
phase_Noutput
|
|
|
|
implicit none
|
|
!*** input variables ***!
|
|
real(pReal), dimension(6), intent(in):: Tstar_v ! 2nd Piola Kirchhoff stress tensor in Mandel notation
|
|
real(pReal), intent(in):: Temperature, &
|
|
dt ! current time increment
|
|
integer(pInt), intent(in):: g, & ! grain number
|
|
ip, & ! integration point number
|
|
el ! element number
|
|
type(p_vec), dimension(homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in) :: state ! state of the current microstructure
|
|
|
|
!*** output variables ***!
|
|
real(pReal), dimension(constitutive_j2_sizePostResults(phase_plasticityInstance(material_phase(g,ip,el)))) :: &
|
|
constitutive_j2_postResults
|
|
|
|
!*** local variables ***!
|
|
real(pReal), dimension(6) :: Tstar_dev_v ! deviatoric part of the 2nd Piola Kirchhoff stress tensor in Mandel notation
|
|
real(pReal) norm_Tstar_dev ! euclidean norm of Tstar_dev
|
|
integer(pInt) matID, &
|
|
o, &
|
|
c
|
|
|
|
!*** global variables ***!
|
|
! constitutive_j2_gdot0
|
|
! constitutive_j2_fTaylor
|
|
! constitutive_j2_n
|
|
|
|
|
|
matID = phase_plasticityInstance(material_phase(g,ip,el))
|
|
|
|
! calculate deviatoric part of 2nd Piola-Kirchhoff stress and its norm
|
|
Tstar_dev_v(1:3) = Tstar_v(1:3) - sum(Tstar_v(1:3))/3.0_pReal
|
|
Tstar_dev_v(4:6) = Tstar_v(4:6)
|
|
norm_Tstar_dev = sqrt(math_mul6x6(Tstar_dev_v,Tstar_dev_v))
|
|
|
|
c = 0_pInt
|
|
constitutive_j2_postResults = 0.0_pReal
|
|
|
|
do o = 1_pInt,phase_Noutput(material_phase(g,ip,el))
|
|
select case(constitutive_j2_output(o,matID))
|
|
case ('flowstress')
|
|
constitutive_j2_postResults(c+1_pInt) = state(g,ip,el)%p(1)
|
|
c = c + 1_pInt
|
|
case ('strainrate')
|
|
constitutive_j2_postResults(c+1_pInt) = &
|
|
constitutive_j2_gdot0(matID) * ( sqrt(1.5_pReal) * norm_Tstar_dev &
|
|
/ &!---------------------------------------------------
|
|
(constitutive_j2_fTaylor(matID) * state(g,ip,el)%p(1)) ) ** constitutive_j2_n(matID)
|
|
c = c + 1_pInt
|
|
end select
|
|
enddo
|
|
|
|
end function constitutive_j2_postResults
|
|
|
|
end module constitutive_j2
|