lolotte | 16 Apr 14:26 2014
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Local data in ScalarField object (writing a Macro)

 

Hey all!

I've spend days looking for an answer, but didn't find any so far...
I am working on the post-treatment of a composite model, by applying failure
criterion that don't exit in Abaqus. To do this, I am creating a python
Macro.

I would like to edit a field output point-by-point. For example, let's say
that I am working with:

S11=session.odbs['myODB.odb'].steps['myStep'].frames[1].fieldOutputs['S'].getScalarField(componentLaber='S11')

And I would like to do something like

if S11< 0:
S11=0
else:
S11=something

But in S11 I have field output, thus I can't work node by node.

Do anyone knows how to do this?
Thanks in advance :)




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Juan Antonio | 16 Apr 12:51 2014
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Creating Field Outputs

 

Hi All

I´m trying to analize a slab, with stresses in xx, yy and xy directions. In my analysis I have to do some operations like Sxx·Syy-txy^2. (S11·S22-S12^2)

When I create a Field Output, if the final values are negative, the result viewer gives zero. I´ve been looking for in the Abaqus documentation but I haven´t been able to find anything.

Thanks!


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arslandede | 15 Apr 20:30 2014
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Tensile stress with abaqus

 

Hello all,

Could you please explain me how can I make tensile test on the abaqus? (Material HDPE - PE80)
I have only stress-strain curve and I want to make cross check with the curve that I will find from Abaqus.

Thanks in advance.

Arslan Dede.

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nibalog | 15 Apr 16:03 2014
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UMAT Material Property Function of Temperature

 

In Abaqus User Subroutines Reference Guide documentation 6.13 under the UMAT section, An example is given for a model as
s_xx + vbar sdot_xx = L e_v + 2u e_xx + Lbar edot + 2ubar e_xx 
where
s = stress;
 e = strain;
and
vbar,L,u,ubar,Lbar are material properties.

They show a detail process of how you convert this example into a UMAT subrountine by using central difference operator with constant material properties.

My question is i have a similar model but my material properties are functions of temperature which is a function of time. Does anyone how to apply the central difference operator on the example given to account of for the material properties changing over time due to temperature chang e?

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stanmadathil | 14 Apr 15:48 2014
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Changing python version

 

I want to change the python installed in Abaqus 6.13-2 to python 2.7.6 from
present 2.6.2. I tried to intall python directly onto abaqus, but abaqus
failed to work after that? May I know whether I can do such a thing at all?
if so, what is the right procedure? 

I'm basically trying to install third party softwares inside abaqus python.
But the present version is incompatible with python version installed
inside.

Please anyone can let me know on this.

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miguelcosta | 12 Apr 19:42 2014
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Global buckling in a 3D column

 

Hello everyone,

I want to reproduce global buckling of a 3D column (simply supported) using
shell elements independently of its length.
I know that each section of the column should behave like a rigid body but I
can't do it, so by doing the buckling analysis I get other buckling modes
(like local buckling).
My initial idea was to use rigid body (tie) constraint in some sections
(uniformly spaced) but what I got was some local buckling in the extremities
of the column.

Can someone help me? I think the problem is in the boundary conditions.

Best regards,
Miguel Costa


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Nima Aryan | 12 Apr 09:16 2014
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error when import inp

 

Hi all
I am trying to model dynamic problem, so start whit abaqus benchmark examples. I imported this attached inp file, but  facing several warning that when run it, failed with error.

WARNING: The following keywords/parameters are not yet supported by the input file reader:
----------------------------------------------------------
*AMPLITUDE, VALUE
*ELFILE
*ELPRINT
*ITS
*MODALFILE
*NODEFILE
*NODEPRINT
*SPRING, NONLINEAR
The model "subdyncanti_itscyl" has been imported from an input file.

error

1 elements have missing property definitions. The elements have been identified in element set ErrElemMissingSection.

There is no amplitude by the name dyn

System error in dampm, time parameter not defined properly on *amplitude

Analysis Input File Processor exited with an error.

can any one help me?

Thanks.

[Non-text portions of this message have been removed]

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mwin195 | 11 Apr 20:59 2014
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install abaqus 6.13 on win7

 

hi everybody

I face to the problem when i wanna install product of abaqus 6.13.
exactly here:
and error is send:
what can i do for solving this problem?
tnx
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ash.martina | 8 Apr 18:10 2014
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Optimize products for weight, performance & eco-efficiency. Download whitepaper on Tosca structure!

 

Optimize your products for weight, performance and eco-efficiency. This white paper will show how you can benefit from simulation-based optimization technology to improve your products, as well as your development process.

Learn about the optimization methods including topology optimization, sizing optimization, shape optimization and bead optimization.



http://www.3ds.com/products-services/simulia/resource-center/white-papers/higher-efficiency-by-optimization/
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Amr Mohamed | 11 Apr 12:00 2014
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Displacement Control

 

How to define displacement control instead of load control and how to obtain the load- deflection curve in the results.
 




With My Best Regard and Thanks


Eng. Amr Mohamed
PhD Student, Cairo University, EGYPT. 
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nazri_bajuri | 9 Apr 12:21 2014
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Updatable Model using GOH Anistropic Hyperelasticity Model

 

Dear All,


Does anyone know how to simulate the GOH model with the ability to self update its material properties (updatable model)? I am currently trying to use USDFLD subroutine, but stuck at the stage to assign the material properties. 

As an example:
1. Elastic model, we can simply use this setting: 
*MATERIAL, NAME=ELASTIC
*ELASTIC, DEPENDENCIES=1
** Table of modulus values decreasing as a function of
** a field variable 1.
2000., 0.3, 0., 0.00
1500., 0.3, 0., 0.01
1200., 0.3, 0., 0.02
1000., 0.3, 0., 0.04

2. But for GOH mo del which normally has the setting of:
 *Material, name=object1
*density
 <density>
*anisotropic hyperelastic,holzapfel, local directions=2
 <C10>, <D>, <K1>, <K2>, <Kappa>

I am not entirely sure how to set it so that it can be applied in USDFLD subroutine. Any helps are highly appreciated. Thank you


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Gmane