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#1 2021-03-30 21:08:52

miib
Member
Registered: 2021-03-23
Posts: 78

Sheet shearing process

Hi.

have anyone idea how simulate a sheet shearing process with Code_Aster ???

i started from this idea ( by Abbas) : introduce a damn and after see it's propagation.

now i'm on this initial level ( see attached files ), have you an idea or an example where it do better ???

:-)


Attachments:
crack.zip, Size: 384.44 KiB, Downloads: 92

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#2 2021-03-31 12:57:27

miib
Member
Registered: 2021-03-23
Posts: 78

Re: Sheet shearing process

something like this (see attached pics) :-)

have anyone idea how to maintain the group's name after POST_MAIL_XFEM bypassing this problem ???

<EXCEPTION> <XFEM_13>                                                   !
   !                                                                         !
   !  In the model, meshes SEG2 or SEG3 have nodes nouveau riches by X-FEM.  !
   !  This is not yet possible in 3D.                                        !
   !  Advices: if this meshes                                                !
   ! are important for computation (linear load'), they should               !
   !  be put far from crack.                                                 !
   !  If this meshes are not useful for computation,                         !
   ! it is not to better affect them in the model,                           !
   !  or to remove them mesh.                                                !
   !-------------------------------------------------------------------------!


Attachments:
bingo.zip, Size: 628.04 KiB, Downloads: 72

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#3 2021-04-01 07:14:45

miib
Member
Registered: 2021-03-23
Posts: 78

Re: Sheet shearing process

must be changed the algorithm ????

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#4 2021-04-02 13:41:45

miib
Member
Registered: 2021-03-23
Posts: 78

Re: Sheet shearing process

the idea is this , see the video at the link :

youtube.com/watch?v=nY1avSVFRR0

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#5 2021-04-03 07:59:40

sameer21101970
Member
Registered: 2019-09-06
Posts: 353

Re: Sheet shearing process

Great work Miib.

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#6 2021-04-03 09:12:21

miib
Member
Registered: 2021-03-23
Posts: 78

Re: Sheet shearing process

Thanks BUT it is only a representative simulation, for explaining the idea, 
with out physical identity because i used this flow chart :

1) geometry definition of fond and fissure and BC groups
2) modification of the sane model with xfem by creation of enriched zone
3) generation of the mesh from xfem model
4) creation of a new model from the mesh of point 3.
5) imposition of material field and BC loads
6) dynamic simulation
7) post processing

the video at the link show this :
1) how enriched zone by xfem divide the sane mesh of the initial model.

ALSO i tried to propagate the fissure by, calc_kg , propa_fiss and its possible to do BUT require very fine mesh which my hardware can't do. I obtained not appreciable results with low density of the mesh.

I tried to use post_cham_xfem but i obtain a same message of error about library string command of fortran.

Conclusion :
The idea (by Abbas) is very good but require the appropriate hardware for right power of calculus.

:-)

Last edited by miib (2021-04-03 09:17:48)

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#7 2021-04-04 10:47:58

miib
Member
Registered: 2021-03-23
Posts: 78

Re: Sheet shearing process

Funny code_aster with easter egg (in the video) :-)

link :

youtube.com/watch?v=SbUuy_cH-18

:-D

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