No InteractionMatrix possible for HCP crystallography.

[daria-mesbah]

Hello,

I have tried to develop a crystal plasticity model using FiniteStrainSingleCrystal brick with a HCP crystallography (including prismatic, basal, pyramidal1A slip families), as in the attached mfront file. The command mfront-query --interaction-matrix-structure HCP_FiniteStrain.mfront returns the exact number of independent coefficients (20). However, unlike to FCC structure described in the documentation, the command line mfront-query --interaction-matrix HCP_FiniteStrain.mfront returns an error as follows:

terminate called after throwing an instance of 'std::runtime_error'
  what():  SlipSystemsDescription::InteractionMatrixStructure::getRank: internal error (unsupported slip system type)
|Abort

It seems that HCP slip systems are not considered to build-up the interaction matrix structure. Fixing this issue would allow me to use the interaction matrix in the hardening laws with the Integrator brick.

Thanks in advance for your kind help, Daria MESBAH

[thelfer]

Hi Daria,

Thanks for your interest to MFront. Would you give me a minimal example to reproduce the issue ?

Thomas

[daria-mesbah]

Hi Thomas,

Thanks your your quick reply. You will find attached a pretty basic mfront file of HCP crystallography, only intended for mfront-query purposes. (Sorry for the file format, it seems that github does not allow mfront file transfer.)

Daria

HCP_FiniteStrain.txt

[thelfer]

Well, it seems working:

$ mfront-query --interaction-matrix HCP_FiniteStrain.mfront
| 0 1 1 2 3 2 4 5 5 5 5 4 |
| 1 0 1 2 2 3 5 4 5 5 4 5 |
| 1 1 0 3 2 2 5 5 4 4 5 5 |
| 6 6 7 8 9 9 10 10 11 11 10 10 |
| 7 6 6 9 8 9 11 10 10 10 10 11 |
| 6 7 6 9 9 8 10 11 10 10 11 10 |
| 12 13 13 14 15 14 16 17 17 18 18 19 |
| 13 12 13 14 14 15 17 16 18 17 19 18 |
| 13 13 12 15 14 14 17 18 16 19 17 18 |
| 13 13 12 15 14 14 18 17 19 16 18 17 |
| 13 12 13 14 14 15 18 19 17 18 16 17 |
| 12 13 13 14 15 14 19 18 18 17 17 16 |

[thelfer]

What version are you using ?

[daria-mesbah]

Here is the version I am using

tfel
Version : 4.0.0-dev
Compiled with  on  - 
Please submit bug at tfel-contact@cea.fr

Which version would you recommend using instead ?

[thelfer]

@daria-mesbah The current version of TFEL is 4.1. Version 4.2 will be out in a week. I would recommend to use any of the rliv-4.1 or master branches.

If you need to stick with the 4.0.x branch, the latest version is 4.0.1. I don't know if this version fixes your issue, but you can use the rliv-4.0 branch to get the latest of the 4.0.x branch, i.e. version 4.0.x with all the bug fixes.

[daria-mesbah]

Thank you for your kind help. I will upgrade the mfront version.

[thelfer]

Do not hesitate if you need any help.