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#1 2018-11-20 11:19:10

kysilko.v
Member
Registered: 2018-11-20
Posts: 4

Non linear analysis with large deformation

Good morning, I would like to ask you, if Code Aster is able to solve large deformation with separation contact and material nonlinearity. The analysis I made considers only quarter model. I have round bar (E=1.93e5MPa, multilinear material curve) which is deformed by plate (E=1.93e7MPa) by 0.35mm. Radius of bar is 1 mm. The bar material has plastic behavior using multilinear material curve. What I am interested in is reaction force at bottom face. I tried to run, however with contact error.

Thanks for any suggestion.

Best regards,

Vit.

Last edited by kysilko.v (2018-11-20 11:20:20)


Attachments:
figures.zip, Size: 30.83 KiB, Downloads: 118

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#2 2018-11-20 14:20:59

jeanpierreaubry
Guru
From: nantes (france)
Registered: 2009-03-12
Posts: 3,638

Re: Non linear analysis with large deformation

hello

what yo want do do is most probably possible

posting here an archive of your present study would help in giving advice

jean pierre aubry


consider reading my book
freely available here https://framabook.org/beginning-with-code_aster/

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#3 2018-11-20 20:39:51

kysilko.v
Member
Registered: 2018-11-20
Posts: 4

Re: Non linear analysis with large deformation

Hi, here are files what I run with exit code 0 however without results. I made 2D plane stress analysis. Thanks. Vit.


Attachments:
deform_aster.zip, Size: 58.54 KiB, Downloads: 97

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#4 2018-11-21 08:31:00

jeanpierreaubry
Guru
From: nantes (france)
Registered: 2009-03-12
Posts: 3,638

Re: Non linear analysis with large deformation

hello

very nice job !

nothing was specified to be printed as a result
add or modify that at the end of your .comm file

#print some value in ascii format
IMPR_RESU(
    MODELE=model,
    FORMAT='RESULTAT',
    UNITE=8, 
    RESU=(
        _F(
        	RESULTAT=resnonl,
            NOM_CHAM='DEPL',
            FORMAT_R='1PE12.3',
            VALE_MAX='OUI',VALE_MIN='OUI',
        ),
    ),
);
IMPR_RESU(
	identifier=u'13:1',
	FORMAT='MED', #specify the format
    UNITE=80, 
    RESU=(
    	_F(RESULTAT=resnonl, #specify the result concept name
   	 		#you can add more details here like
   	 		#NOM_CHAM='DEPL',
   	 	),
   	 	_F(RESULTAT=resnonl,NOM_CHAM='SIGM_NOEU',),
    ),
);

maybe reading my book would help

and take the time to Introduce yourself in the relevant section of the forum

jean pierre aubry


consider reading my book
freely available here https://framabook.org/beginning-with-code_aster/

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#5 2018-11-21 17:16:21

kysilko.v
Member
Registered: 2018-11-20
Posts: 4

Re: Non linear analysis with large deformation

Hi, thank you very much for advice. I am able to run analysis with linear behavior. What I try right now is to use large displacements with non linear material. I need to change contact to Continuous from Discrete. However I get convergence error. I have attached zipped file. I have already red your book, however I did not find a solution.

Thanks,
Vit.

P.S. I have introduced myself already in proper topic smile


Attachments:
Code_Aster_NL.zip, Size: 13.64 KiB, Downloads: 94

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