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shearRates more similar to kinetics

This commit is contained in:
Martin Diehl 2018-12-19 07:30:43 +01:00
parent 89196b953f
commit 2476dd4d8b
1 changed files with 23 additions and 15 deletions
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38
src/plastic_kinematichardening.f90
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@ -425,8 +425,9 @@ end subroutine plastic_kinehardening_init
!> @brief calculation of shear rates (\dot \gamma)
!--------------------------------------------------------------------------------------------------
subroutine plastic_kinehardening_shearRates(gdot_pos,gdot_neg,tau_pos,tau_neg, &
Mp,instance,of)
Mp,instance,of, dgdot_dtau_pos, &
dgdot_dtau_neg)
use prec
use math
implicit none
@ -440,6 +441,9 @@ subroutine plastic_kinehardening_shearRates(gdot_pos,gdot_neg,tau_pos,tau_neg, &
gdot_neg, & !< shear rates from negative line segments
tau_pos, & !< shear stress on positive line segments
tau_neg !< shear stress on negative line segments
real(pReal), dimension(paramNew(instance)%totalNslip), intent(out),optional :: &
dgdot_dtau_pos, &
dgdot_dtau_neg
integer(pInt) :: &
i
@ -455,7 +459,22 @@ subroutine plastic_kinehardening_shearRates(gdot_pos,gdot_neg,tau_pos,tau_neg, &
gdot_pos = sign(0.5_pReal * prm%gdot0 *(abs(tau_pos)/ state(instance)%crss(:,of))**prm%n_slip,tau_pos)
gdot_neg = sign(0.5_pReal * prm%gdot0 *(abs(tau_neg)/ state(instance)%crss(:,of))**prm%n_slip,tau_neg)
if (present(dgdot_dtau_pos)) then
where(dNeq0(gdot_pos))
dgdot_dtau_pos = gdot_pos*prm%n_slip/tau_pos
else where
dgdot_dtau_pos = 0.0_pReal
end where
endif
if (present(dgdot_dtau_neg)) then
where(dNeq0(gdot_neg))
dgdot_dtau_neg = gdot_neg*prm%n_slip/tau_neg
else where
dgdot_dtau_neg = 0.0_pReal
end where
endif
end associate
end subroutine plastic_kinehardening_shearRates
@ -493,18 +512,7 @@ subroutine plastic_kinehardening_LpAndItsTangent(Lp,dLp_dMp,Mp,instance,of)
dLp_dMp = 0.0_pReal
call plastic_kinehardening_shearRates(gdot_pos,gdot_neg,tau_pos,tau_neg, &
Mp,instance,of)
where (dNeq0(gdot_pos))
dgdot_dtau_pos = gdot_pos*prm%n_slip/tau_pos
else where
dgdot_dtau_pos = 0.0_pReal
end where
where (dNeq0(gdot_neg))
dgdot_dtau_neg = gdot_neg*prm%n_slip/tau_neg
else where
dgdot_dtau_neg = 0.0_pReal
end where
Mp,instance,of,dgdot_dtau_pos,dgdot_dtau_neg)
do j = 1_pInt, prm%totalNslip
Lp = Lp + (gdot_pos(j)+gdot_neg(j))*prm%Schmid_slip(1:3,1:3,j)