[Solvd]How to inclde stress frm previous load case

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7 years 8 months ago - 7 years 8 months ago #6955 by Mihir
hey guys,

I am trying to implement a soil model, where my first stage is to determine the in-situ stress( the stress without any external loading, under the action of gravity). In the next stage, which is excavation, I need to include in my nodes the stress of the earlier case before doing the computation. How can I achieve this? [ Is it through crea_champ ?] Is there some tutorial that I could refer for this?

Thanking in advance,
d_riel
Last edit: 7 years 8 months ago by Mihir.

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7 years 8 months ago - 7 years 8 months ago #6956 by RichardS
Hello d_riel,
that shouldn't be a problem. CREA_CHAMP is indeed the right solution.

Something like this should work:
RESU0 = (....initial calc with gravity
                   ...INST_FIN=tFIN....);

SIGM0 = CREA_CHAMP(TYPE_CHAM='ELGA_SIEF_R',
                                            OPERATION='EXTR',
                                            RESULTAT=RESU0,
                                            NOM_CHAM='SIEF_ELGA',
                                            INST=tFIN);

RESU1 = STAT_NON_LINE(ETAT_INIT=_F(SIGM=SIGM0),
                                            ...);

Best regards,
Richard

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Last edit: 7 years 8 months ago by RichardS.
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7 years 8 months ago - 7 years 8 months ago #6958 by Mihir
Hey Richard!

Thanks a lot, thats really helpful. Can you also tell me why we are using INST_FIN?

Regds,
d_rirel
Last edit: 7 years 8 months ago by Mihir.

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7 years 8 months ago #6959 by RichardS
Hello d_riel,
its no neccessity to use INST_FIN, it was just to indicate a time step, because with CREA_CHAMP you can only extract one time step of a field.

Best regards,
Richard

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7 years 8 months ago - 7 years 8 months ago #6961 by Mihir
Hey Richard,

Thanks a lot for the reply.

Regds,
d_riel
Last edit: 7 years 8 months ago by Mihir.

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