corrections to plastic work calculation and volumetric strain split

This commit is contained in:
Pratheek Shanthraj 2014-08-08 17:01:20 +00:00
parent c4b9ddf45d
commit 9c40f187a0
3 changed files with 27 additions and 24 deletions

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@ -197,7 +197,7 @@ subroutine constitutive_damage_collectDotState(Tstar_v, Fe, Lp, ipc, ip, el)
call damage_local_dotState(Tstar_v, Fe, Lp, ipc, ip, el) call damage_local_dotState(Tstar_v, Fe, Lp, ipc, ip, el)
case (DAMAGE_gradient_ID) case (DAMAGE_gradient_ID)
call damage_gradient_dotState(Tstar_v, Lp, ipc, ip, el) call damage_gradient_dotState(Tstar_v, Fe, Lp, ipc, ip, el)
end select end select

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@ -262,7 +262,6 @@ end subroutine damage_gradient_aTolState
subroutine damage_gradient_microstructure(Tstar_v, Fe, ipc, ip, el) subroutine damage_gradient_microstructure(Tstar_v, Fe, ipc, ip, el)
use material, only: & use material, only: &
mappingConstitutive, & mappingConstitutive, &
phase_damageInstance, &
damageState damageState
use math, only: & use math, only: &
math_Mandel66to3333, & math_Mandel66to3333, &
@ -287,22 +286,16 @@ subroutine damage_gradient_microstructure(Tstar_v, Fe, ipc, ip, el)
integer(pInt) :: & integer(pInt) :: &
phase, constituent phase, constituent
real(pReal) :: & real(pReal) :: &
strainEnergy, strain(3,3),strain_trace strainEnergy, strain(3,3), negative_volStrain
phase = mappingConstitutive(2,ipc,ip,el) phase = mappingConstitutive(2,ipc,ip,el)
constituent = mappingConstitutive(1,ipc,ip,el) constituent = mappingConstitutive(1,ipc,ip,el)
strain = 0.5_pReal*(math_mul33x33(math_transpose33(Fe),Fe)-math_I3) strain = 0.5_pReal*(math_mul33x33(math_transpose33(Fe),Fe)-math_I3)
strain_trace = math_trace33(strain) negative_volStrain = min(0.0_pReal,math_trace33(strain)/3.0_pReal)
if(strain_trace < 0.0_pReal) then
strain = strain - (strain_trace/3.0_pReal)*math_I3
strainEnergy = 0.5_pReal*sum(strain*math_mul3333xx33(math_Mandel66to3333(lattice_C66(1:6,1:6,phase)), & strainEnergy = 0.5_pReal*sum(strain*math_mul3333xx33(math_Mandel66to3333(lattice_C66(1:6,1:6,phase)), &
strain )) strain - negative_volStrain*math_I3))
else
strainEnergy = 0.5_pReal*sum(strain*math_mul3333xx33(math_Mandel66to3333(lattice_C66(1:6,1:6,phase)), &
strain))
endif
damageState(phase)%state(2,constituent) = abs(strainEnergy)/ & damageState(phase)%state(2,constituent) = abs(strainEnergy)/ &
(math_trace33(lattice_surfaceEnergy33(1:3,1:3,phase))/3.0_pReal) + & (math_trace33(lattice_surfaceEnergy33(1:3,1:3,phase))/3.0_pReal) + &
@ -313,14 +306,19 @@ end subroutine damage_gradient_microstructure
!-------------------------------------------------------------------------------------------------- !--------------------------------------------------------------------------------------------------
!> @brief calculates derived quantities from state !> @brief calculates derived quantities from state
!-------------------------------------------------------------------------------------------------- !--------------------------------------------------------------------------------------------------
subroutine damage_gradient_dotState(Tstar_v, Lp, ipc, ip, el) subroutine damage_gradient_dotState(Tstar_v, Fe, Lp, ipc, ip, el)
use material, only: & use material, only: &
mappingConstitutive, & mappingConstitutive, &
damageState damageState
use math, only: & use math, only: &
math_Mandel6to33, & math_Mandel66to3333, &
math_trace33 math_mul33x33, &
math_mul3333xx33, &
math_transpose33, &
math_trace33, &
math_I3
use lattice, only: & use lattice, only: &
lattice_C66, &
lattice_surfaceEnergy33 lattice_surfaceEnergy33
implicit none implicit none
@ -331,15 +329,20 @@ subroutine damage_gradient_dotState(Tstar_v, Lp, ipc, ip, el)
real(pReal), intent(in), dimension(6) :: & real(pReal), intent(in), dimension(6) :: &
Tstar_v !< 2nd Piola Kirchhoff stress tensor (Mandel) Tstar_v !< 2nd Piola Kirchhoff stress tensor (Mandel)
real(pReal), intent(in), dimension(3,3) :: & real(pReal), intent(in), dimension(3,3) :: &
Lp Fe, Lp
integer(pInt) :: & integer(pInt) :: &
instance, phase, constituent phase, constituent
real(pReal), dimension(3,3) :: &
stress, strain
phase = mappingConstitutive(2,ipc,ip,el) phase = mappingConstitutive(2,ipc,ip,el)
constituent = mappingConstitutive(1,ipc,ip,el) constituent = mappingConstitutive(1,ipc,ip,el)
strain = 0.5_pReal*(math_mul33x33(math_transpose33(Fe),Fe)-math_I3)
stress = math_mul3333xx33(math_Mandel66to3333(lattice_C66(1:6,1:6,phase)), strain)
damageState(phase)%dotState(1,constituent) = & damageState(phase)%dotState(1,constituent) = &
sum(abs(math_Mandel6to33(Tstar_v)*Lp))/ & sum(abs(stress*Lp))/ &
(math_trace33(lattice_surfaceEnergy33(1:3,1:3,phase))/3.0_pReal) (math_trace33(lattice_surfaceEnergy33(1:3,1:3,phase))/3.0_pReal)
end subroutine damage_gradient_dotState end subroutine damage_gradient_dotState

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@ -255,7 +255,6 @@ end subroutine damage_local_aTolState
subroutine damage_local_dotState(Tstar_v, Fe, Lp, ipc, ip, el) subroutine damage_local_dotState(Tstar_v, Fe, Lp, ipc, ip, el)
use material, only: & use material, only: &
mappingConstitutive, & mappingConstitutive, &
phase_damageInstance, &
damageState damageState
use math, only: & use math, only: &
math_Mandel66to3333, & math_Mandel66to3333, &
@ -280,22 +279,23 @@ subroutine damage_local_dotState(Tstar_v, Fe, Lp, ipc, ip, el)
Lp, & Lp, &
Fe Fe
integer(pInt) :: & integer(pInt) :: &
phase, constituent, instance phase, constituent
real(pReal) :: & real(pReal) :: &
trialDamage, strain(3,3) trialDamage, strain(3,3), stress(3,3), negative_volStrain
phase = mappingConstitutive(2,ipc,ip,el) phase = mappingConstitutive(2,ipc,ip,el)
constituent = mappingConstitutive(1,ipc,ip,el) constituent = mappingConstitutive(1,ipc,ip,el)
instance = phase_damageInstance(phase)
strain = 0.5_pReal*(math_mul33x33(math_transpose33(Fe),Fe)-math_I3) strain = 0.5_pReal*(math_mul33x33(math_transpose33(Fe),Fe)-math_I3)
negative_volStrain = min(0.0_pReal,math_trace33(strain)/3.0_pReal)
stress = math_mul3333xx33(math_Mandel66to3333(lattice_C66(1:6,1:6,phase)),strain)
trialDamage = min(1.0_pReal, & trialDamage = min(1.0_pReal, &
(math_trace33(lattice_surfaceEnergy33(1:3,1:3,phase))/3.0_pReal)/ & (math_trace33(lattice_surfaceEnergy33(1:3,1:3,phase))/3.0_pReal)/ &
(abs(sum(strain*math_mul3333xx33(math_Mandel66to3333(lattice_C66(1:6,1:6,phase)),strain))) + & (abs(sum((strain - negative_volStrain*math_I3)*stress)) + &
damageState(phase)%state(1,constituent))) damageState(phase)%state(1,constituent)))
damageState(phase)%dotState(1,constituent) = & damageState(phase)%dotState(1,constituent) = &
sum(abs(math_Mandel6to33(Tstar_v)*Lp)) sum(abs(stress*Lp))
damageState(phase)%dotState(2,constituent) = & damageState(phase)%dotState(2,constituent) = &
damage_local_crack_mobility(instance)* & damage_local_crack_mobility(instance)* &
(trialDamage - damageState(phase)%state(2,constituent)) (trialDamage - damageState(phase)%state(2,constituent))