I know concrete is quasi brittle material, but using ductile damage properties in maximum stress zone and brittle damage properties in other zones may fix the problem. may be ABAQUS does not allow you to use both damage properties in one material, but it is an idea only.
Please let me know about...
May be this help..
mdb.models['Model-1'].KinematicHardening(definition=REBAR, name='rebar-hardening', region=region, field='', distributionType=MAGNITUDE, numBackStress=1, rebarLayerNames=('rebar-layer1', ), equivPlasticStrain=(0.00035, ), backStress=((0.2, ), ))
Regards,
Mohammad Shahbazi...
I have seen the model already. I can not help you.
Mohammad Shahbazi
http://www.omranafzar.com
shahbazi@omranafzar.com
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Please DO NOT respond to me directly but don't hesitate to post your response here so that all can share the information.
as the warning says you must specify "*preprint,model=yes", you can do that by selecting "Job>General>Print model definition data" in GUI. but actually it is not a serious problem..
Regards,
Mohammad Shahbazi
http://www.omranafzar.com
shahbazi@omranafzar.com
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I have made many comparisons like that between ABAQUS results and practical results, but have not seen more than 5% difference between them. there are many details must be noticed in modeling, I think there is something wrong in your modeling or material definition.
Please leave your model here...
Leo,
you have to define rebars and use *PRESTRESS parameter in it. if it is a new thread, please create a new one and attach your model to be considered..
Good Luck,
Mohammad Shahbazi
http://www.omranafzar.com
shahbazi@omranafzar.com
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Please DO NOT respond to...
Francisco,
I had a look at to your model, the result was nonlinear so I think you have to change the damage parameters to get the appropriate result.
Mohammad Shahbazi
http://www.omranafzar.com
shahbazi@omranafzar.com
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Please DO NOT respond to me directly but...
I am agree with SWComposites, I think you should use a combination of elastic and plastic material properties.
Regards,
Mohammad Shahbazi
www.OmranAfzar.com
and The attached file is loaded by 30 and converges.
please check it out and let me know if you had anyother problems.
Regards
Mohammad Shahbazi
www.OmranAfzar.comhttp://files.engineering.com/getfile.aspx?folder=71f1bd5f-a193-460f-bdcf-d187644a2dff&file=bm01-modified.zip
negative eigenvalue is not so important problem,it means that the buckle load is in the opposite direction to the reference load.
Regards,
Mohammad Shahbazi
www.OmranAfzar.com
