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tiny differences between orientation conversions result in more 

iterations

Seen so far only for plasticityDetectChanges test (confirmed for dislotwin and
phenopowerlaw).
The max difference between the entries of the rotation matrix from
orientation0%asMatrix() and eu2om(Eulers)/eu2om(orientation0%asEulers) is
1e-15. This is the ratio of km/atom radius! Still, the number of
iterations is consistently higher.
Results are the same. I believe this is a strange coincidence where one
particular orientation causes problems. The current version recovers almost the 'good' behavior
of math_EulerToR(Eulers)
This commit is contained in:
Martin Diehl 2020-02-12 20:01:11 +01:00
parent 8770613e9c
commit b861ad11c1
1 changed files with 1 additions and 1 deletions
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src/crystallite.f90
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@ -238,7 +238,7 @@ subroutine crystallite_init
do e = FEsolving_execElem(1),FEsolving_execElem(2) do e = FEsolving_execElem(1),FEsolving_execElem(2)
myNcomponents = homogenization_Ngrains(material_homogenizationAt(e)) myNcomponents = homogenization_Ngrains(material_homogenizationAt(e))
do i = FEsolving_execIP(1), FEsolving_execIP(2); do c = 1, myNcomponents do i = FEsolving_execIP(1), FEsolving_execIP(2); do c = 1, myNcomponents
crystallite_Fp0(1:3,1:3,c,i,e) = material_orientation0(c,i,e)%asMatrix() ! plastic def gradient reflects init orientation crystallite_Fp0(1:3,1:3,c,i,e) = eu2om(material_orientation0(c,i,e)%asEulers()) ! plastic def gradient reflects init orientation
crystallite_Fi0(1:3,1:3,c,i,e) = constitutive_initialFi(c,i,e) crystallite_Fi0(1:3,1:3,c,i,e) = constitutive_initialFi(c,i,e)
crystallite_F0(1:3,1:3,c,i,e) = math_I3 crystallite_F0(1:3,1:3,c,i,e) = math_I3
crystallite_localPlasticity(c,i,e) = phase_localPlasticity(material_phaseAt(c,e)) crystallite_localPlasticity(c,i,e) = phase_localPlasticity(material_phaseAt(c,e))