HCP Slip Direction and Slip Plane Conversion for Schmid Factor Calculation about crystalplasticity HOT 2 CLOSED

The slip plane transformation

!         slip plane conversion
!         (hkil)->(h (h+2k)/sqrt(3) l/(c/a))
          do is=1,30
              nor(is,1) = nor3h(is,1)
              nor(is,2) = (nor3h(is,1) + 2.*nor3h(is,2))/sqrt(3.)
              nor(is,3) = nor3h(is,4)/caratio
          end do
!

is in line with that mentioned in MOOSE Framework document
All the values are multiplied with a

But I think that the slip direction transformation should be like this

!         slip direction conversion
!         [uvtw]->[3u/2     (u+2v)*sqrt(3)/2     (3/2)*w*(c/a)])
!

i.e. a factor of (3/2) should be multiplied to the third term

from crystalplasticity.

Thanks Vikram, you are asking good questions.

I actually took it from Dr. Roters.

Please see version DAMASK 3.0 their lattice.f90 file - line 1954.

The direction conventions is the same as in MOOSE but the values are multiplied by 3/2. The third direction along c-axis "w" is multiplied with c/a ratio and plane normal is divided by c/a ratio in our case. While in MOOSE, it seems it is both divided which is strange.

Hope this helps

from crystalplasticity.