crystallite: restoration of last known good Lp_guess
CPFEM_Taylor: exit whenever cutback limit exceeded
This commit is contained in:
Luc Hantcherli
parent
cdb2dd8808
commit
9626c25bfb
|
|
@ -249,7 +249,14 @@
|
|||
CPFEM_dt,cp_en,CPFEM_in,grain,.true.,&
|
||||
CPFEM_Temperature(CPFEM_in,cp_en),&
|
||||
CPFEM_ffn1_bar(:,:,CPFEM_in,cp_en),CPFEM_ffn_bar(:,:,CPFEM_in,cp_en),&
|
||||
CPFEM_Fp_old(:,:,grain,CPFEM_in,cp_en),constitutive_state_old(:,grain,CPFEM_in,cp_en))
|
||||
CPFEM_Fp_old(:,:,grain,CPFEM_in,cp_en),constitutive_state_old(:,grain,CPFEM_in,cp_en))
|
||||
|
||||
if (msg /= 'ok') then ! solution not reached --> exit
|
||||
write(6,*) 'grain loop failed to converge @ EL:',cp_en,' IP:',CPFEM_in
|
||||
call IO_error(600)
|
||||
return
|
||||
endif
|
||||
|
||||
volfrac = constitutive_matVolFrac(grain,CPFEM_in,cp_en)*constitutive_texVolFrac(grain,CPFEM_in,cp_en)
|
||||
CPFEM_PK1_bar(:,:,CPFEM_in,cp_en) = CPFEM_PK1_bar(:,:,CPFEM_in,cp_en) + volfrac*PK1
|
||||
if (updateJaco) CPFEM_dPdF_bar(:,:,:,:,CPFEM_in,cp_en) = &
|
||||
|
|
|
|||
|
|
@ -89,19 +89,21 @@ CONTAINS
|
|||
state_new = state_bestguess ! try best available guess for state
|
||||
|
||||
call TimeIntegration(msg,Lp,Fp_new,Fe_new,P,state_new,post_results,.true., & ! def gradients and PK2 at end of time step
|
||||
dt_aim,cp_en,ip,grain,Temperature,Fg_aim,Fp_current,state_current,0)
|
||||
dt_aim,cp_en,ip,grain,Temperature,Fg_aim,Fp_current,state_current,0_pInt)
|
||||
!
|
||||
if (msg == 'ok') then
|
||||
cuttedBack = .false. ! no cut back required
|
||||
guessNew = .false. ! keep the Lp
|
||||
subFrac = subFrac + subStep
|
||||
subStep = 1.0_pReal - subFrac ! try one go
|
||||
subStep = 1.0_pReal - subFrac ! try one go
|
||||
if (debugger) write (6,*) '--------- one go -----------++##'
|
||||
else
|
||||
nCutbacks = nCutbacks + 1 ! record additional cutback
|
||||
cuttedBack = .true. ! encountered problems -->
|
||||
guessNew = .true. ! redo plastic Lp guess
|
||||
subStep = subStep / 2.0_pReal ! cut time step in half
|
||||
state_bestguess = state_current ! current state is then best guess
|
||||
if (debugger) write (6,*) '>>>>>>>>>>>>>>>>>>>> cutback <<<<<<<<<<<<<<<<<<<<<<'
|
||||
endif
|
||||
enddo ! potential substepping
|
||||
!
|
||||
|
|
@ -116,7 +118,7 @@ CONTAINS
|
|||
Lp_pert = Lp
|
||||
state_pert = state_new ! initial guess from end of time step
|
||||
call TimeIntegration(msg,Lp_pert,Fp_pert,Fe_pert,P_pert,state_pert,post_results,.false., & ! def gradients and PK2 at end of time step
|
||||
dt_aim,cp_en,ip,grain,Temperature,Fg_pert,Fp_current,state_current,1)
|
||||
dt_aim,cp_en,ip,grain,Temperature,Fg_pert,Fp_current,state_current,1_pInt)
|
||||
if (msg == 'ok') &
|
||||
dPdF(:,:,k,l) = (P_pert-P)/pert_Fg ! constructing tangent dP_ij/dFg_kl only if valid forward difference
|
||||
! otherwise leave component unchanged
|
||||
|
|
@ -158,7 +160,8 @@ CONTAINS
|
|||
use constitutive, only: constitutive_Nstatevars,&
|
||||
constitutive_homogenizedC,constitutive_dotState,constitutive_LpAndItsTangent,&
|
||||
constitutive_Nresults,constitutive_Microstructure,constitutive_post_results
|
||||
use math
|
||||
use math
|
||||
use IO
|
||||
implicit none
|
||||
!
|
||||
character(len=*) msg
|
||||
|
|
@ -204,7 +207,9 @@ Outer: do ! outer iteration: State
|
|||
!
|
||||
iInner = 0_pInt
|
||||
leapfrog = 1.0_pReal ! correction as suggested by invdRdLp-step
|
||||
maxleap = 1024.0_pReal ! preassign maximum acceleration level
|
||||
maxleap = 1024.0_pReal ! preassign maximum acceleration level
|
||||
|
||||
Lpguess_old = Lpguess ! consider present Lpguess good
|
||||
!
|
||||
Inner: do ! inner iteration: Lp
|
||||
iInner = iInner+1
|
||||
|
|
@ -212,8 +217,8 @@ Inner: do ! inner iteration: Lp
|
|||
msg = 'limit Inner iteration'
|
||||
debug_InnerLoopDistribution(nInner) = debug_InnerLoopDistribution(nInner)+1
|
||||
return
|
||||
endif
|
||||
|
||||
endif
|
||||
|
||||
B = math_i3 - dt*Lpguess
|
||||
BT = transpose(B)
|
||||
AB = matmul(A,B)
|
||||
|
|
@ -224,10 +229,12 @@ Inner: do ! inner iteration: Lp
|
|||
forall(i=1:3) Tstar_v(i) = Tstar_v(i)-p_hydro ! subtract hydrostatic pressure
|
||||
call constitutive_LpAndItsTangent(Lp,dLp, &
|
||||
Tstar_v,state,Temperature,grain,ip,cp_en)
|
||||
|
||||
Rinner = Lpguess - Lp ! update current residuum
|
||||
|
||||
|
||||
if (not(any(Rinner.NE.Rinner)) .and. & ! exclude all NaN in residuum
|
||||
Rinner = Lpguess - Lp ! update current residuum
|
||||
|
||||
|
||||
if (not(any(Rinner.NE.Rinner)) .and. & ! exclude any NaN in residuum
|
||||
( (maxval(abs(Rinner)) < abstol_Inner) .or. & ! below abs tol .or.
|
||||
( any(abs(dt*Lpguess) > relevantStrain) .and. & ! worth checking? .and.
|
||||
maxval(abs(Rinner/Lpguess),abs(dt*Lpguess) > relevantStrain) < reltol_Inner & ! below rel tol
|
||||
|
|
@ -236,14 +243,20 @@ Inner: do ! inner iteration: Lp
|
|||
) &
|
||||
exit Inner ! convergence
|
||||
!
|
||||
! check for acceleration/deceleration in Newton--Raphson correction
|
||||
if (leapfrog > 1.0_pReal .and. &
|
||||
! check for acceleration/deceleration in Newton--Raphson correction
|
||||
|
||||
if (any(Rinner.NE.Rinner) .and. & ! NaN occured at regular speed
|
||||
leapfrog == 1.0) then
|
||||
Lpguess = Lpguess_old ! restore known good guess
|
||||
msg = 'NaN present' ! croak for cutback
|
||||
return
|
||||
elseif (leapfrog > 1.0_pReal .and. & ! at fast pace ?
|
||||
(sum(Rinner*Rinner) > sum(Rinner_old*Rinner_old) .or. & ! worse residuum
|
||||
sum(Rinner*Rinner_old) < 0.0_pReal) .or. & ! residuum changed sign (overshoot)
|
||||
any(Rinner.NE.Rinner) ) then ! NaN
|
||||
maxleap = 0.5_pReal * leapfrog ! limit next acceleration
|
||||
leapfrog = 1.0_pReal ! grinding halt
|
||||
! if (debugger) write(6,*) 'grinding HALT'
|
||||
|
||||
else ! better residuum
|
||||
dTdLp = 0.0_pReal ! calc dT/dLp
|
||||
forall (i=1:3,j=1:3,k=1:3,l=1:3,m=1:3,n=1:3) &
|
||||
|
|
@ -259,11 +272,12 @@ Inner: do ! inner iteration: Lp
|
|||
endif
|
||||
!
|
||||
Rinner_old = Rinner ! remember current residuum
|
||||
Lpguess_old = Lpguess ! remember current Lp guess
|
||||
if (iInner > 1 .and. leapfrog < maxleap) leapfrog = 2.0_pReal * leapfrog ! accelerate
|
||||
Lpguess_old = Lpguess ! remember current Lp guess
|
||||
if (iInner > 1 .and. leapfrog < maxleap) &
|
||||
leapfrog = 2.0_pReal * leapfrog ! accelerate if ok
|
||||
endif
|
||||
!
|
||||
Lpguess = Lpguess_old ! start from current guess
|
||||
Lpguess = Lpguess_old ! start from current guess
|
||||
Rinner = Rinner_old ! use current residuum
|
||||
forall (i=1:3,j=1:3,k=1:3,l=1:3) & ! leapfrog to updated Lpguess
|
||||
Lpguess(i,j) = Lpguess(i,j) - leapfrog*invdRdLp(3*(i-1)+j,3*(k-1)+l)*Rinner(k,l)
|
||||
|
|
|
|||
Loading…
Reference in New Issue