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corrected tangent of plastic velocity gradient dLp_dT for slip (twin volume fraction was missing)

This commit is contained in:
Christoph Kords 2014-01-16 09:29:21 +00:00
parent 563c4ac94b
commit b24dd62431
1 changed files with 18 additions and 13 deletions
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31
code/constitutive_phenopowerlaw.f90
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@ -803,14 +803,18 @@ pure subroutine constitutive_phenopowerlaw_LpAndItsTangent(Lp,dLp_dTstar99,Tstar
nonSchmid_tensor(1:3,1:3,2) = nonSchmid_tensor(1:3,1:3,2) + constitutive_phenopowerlaw_nonSchmidCoeff(k,matID)*&
lattice_Sslip(1:3,1:3,2*k+1,index_myFamily+i,structID)
enddo
gdot_slip_pos(j) = 0.5_pReal*constitutive_phenopowerlaw_gdot0_slip(matID)* &
((abs(tau_slip_pos(j))/state(ipc,ip,el)%p(j))**constitutive_phenopowerlaw_n_slip(matID))*&
sign(1.0_pReal,tau_slip_pos(j))
gdot_slip_neg(j) = 0.5_pReal*constitutive_phenopowerlaw_gdot0_slip(matID)* &
((abs(tau_slip_neg(j))/state(ipc,ip,el)%p(j))**constitutive_phenopowerlaw_n_slip(matID))*&
sign(1.0_pReal,tau_slip_neg(j))
Lp = Lp + (1.0_pReal-state(ipc,ip,el)%p(index_F))*& ! 1-F
(gdot_slip_pos(j)+gdot_slip_neg(j))*lattice_Sslip(1:3,1:3,1,index_myFamily+i,structID)
gdot_slip_pos(j) = 0.5_pReal * (1.0_pReal - state(ipc,ip,el)%p(index_F)) & ! 1-F
* constitutive_phenopowerlaw_gdot0_slip(matID) &
* (abs(tau_slip_pos(j)) / state(ipc,ip,el)%p(j)) &
**constitutive_phenopowerlaw_n_slip(matID) &
* sign(1.0_pReal,tau_slip_pos(j))
gdot_slip_neg(j) = 0.5_pReal * (1.0_pReal - state(ipc,ip,el)%p(index_F)) & ! 1-F
* constitutive_phenopowerlaw_gdot0_slip(matID) &
* (abs(tau_slip_neg(j)) / state(ipc,ip,el)%p(j)) &
**constitutive_phenopowerlaw_n_slip(matID) &
* sign(1.0_pReal,tau_slip_neg(j))
Lp = Lp + (gdot_slip_pos(j) + gdot_slip_neg(j)) &
* lattice_Sslip(1:3,1:3,1,index_myFamily+i,structID)
!--------------------------------------------------------------------------------------------------
! Calculation of the tangent of Lp
@ -841,11 +845,12 @@ pure subroutine constitutive_phenopowerlaw_LpAndItsTangent(Lp,dLp_dTstar99,Tstar
!--------------------------------------------------------------------------------------------------
! Calculation of Lp
tau_twin(j) = dot_product(Tstar_v,lattice_Stwin_v(1:6,index_myFamily+i,structID))
gdot_twin(j) = (1.0_pReal-state(ipc,ip,el)%p(index_F))*& ! 1-F
constitutive_phenopowerlaw_gdot0_twin(matID)*&
(abs(tau_twin(j))/state(ipc,ip,el)%p(nSlip+j))**&
constitutive_phenopowerlaw_n_twin(matID)*max(0.0_pReal,sign(1.0_pReal,tau_twin(j)))
Lp = Lp + gdot_twin(j)*lattice_Stwin(1:3,1:3,index_myFamily+i,structID)
gdot_twin(j) = (1.0_pReal - state(ipc,ip,el)%p(index_F)) & ! 1-F
* constitutive_phenopowerlaw_gdot0_twin(matID) &
* (abs(tau_twin(j)) / state(ipc,ip,el)%p(nSlip+j)) &
**constitutive_phenopowerlaw_n_twin(matID) &
* max(0.0_pReal,sign(1.0_pReal,tau_twin(j)))
Lp = Lp + gdot_twin(j) * lattice_Stwin(1:3,1:3,index_myFamily+i,structID)
!--------------------------------------------------------------------------------------------------
! Calculation of the tangent of Lp