DAMASK_EICMD/code/config/Phase_Phenopowerlaw_Magnesi...

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2014-01-15 17:59:44 +05:30
#-------------------#
<phase>
#-------------------#
/echo/
[Mg]
plasticity phenopowerlaw
elasticity hooke
(output) resistance_slip
(output) shearrate_slip
(output) resolvedstress_slip
(output) totalshear
(output) resistance_twin
(output) shearrate_twin
(output) resolvedstress_twin
(output) totalvolfrac
lattice_structure hex
covera_ratio 1.62350 # from Tromans 2011, Elastic Anisotropy of HCP Metal Crystals and Polycrystals
c11 59.3e9 # - " -
c33 61.5e9 # - " -
c44 16.4e9 # - " -
c12 25.7e9 # - " -
c13 21.4e9 # - " -
# basal prism prism pyr(a) pyr(c+a) pyr(c+a)
Nslip 3 3 0 6 0 6 # from Agnew et al 2006, Validating a polycrystal model for the elastoplastic response of mg alloy AZ32 using in situ neutron diffraction
# T1 C1 T2 C2
Ntwin 6 0 0 6 # - " -
# basal prism prism pyr(a) pyr(c+a) pyr(c+a)
tau0_slip 10.0e6 55.0e6 0 60.0e6 0.0 60.0e6 # - " - table 1, pyr(a) set to pyr(c+a)
tausat_slip 40.0e6 135.0e6 0 150.0e6 0.0 150.0e6 # - " - table 1, pyr(a) set to pyr(c+a)
# T1 C1 T2 C2
tau0_twin 40e6 0.0 0.0 60.0e6 # - " - table 1, compressive twin guessed by Steffi, tensile twin modified to match experimental results
tausat_twin 60e6 0.0 0.0 80.0e6
h0_twintwin 50.0e6 # - " - table 1, same range as theta_0
h0_slipslip 500.0e6 # - " - table 1, same range as theta_0
h0_twinslip 150.0e6 # guessing
interaction_slipslip 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 # just guessing
interaction_twintwin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 # - " -
interaction_sliptwin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 # - " -
interaction_twinslip 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 # - " -
####################################################
# open for discussion
####################################################
atol_resistance 1
atol_shear 0
atol_twinfrac 0
n_twin 20
n_slip 20
gdot0_twin 0.001
gdot0_slip 0.001
twin_b 0
twin_c 0
twin_d 20
twin_e 20
a_slip 2.25
s_pr 10.0 # push-up factor for slip saturation due to twinning