extracting material properties from Abaqus

[louisepb]

Hi Maryam,
Sorry for the delay replying but I don't work on Fridays and was out of the office yesterday.

With the dry fibre export you should get a separate .eld and .ori file. You will need to run your job from the command line in order for Abaqus to load the information in these files. If you just load in CAE it won't be able to load this information.

You will need to take the volume fraction into account as even in a dry fabric simulation this will give the tow volume fraction (as the yarns represented in the model are not solid) and will affect properties such as stiffness.

Best regards,
Louise

[maryam_sodagar]

Dear Louise

Thank you so much.
I only use "Abaqus job= " command to run the job in command line. Should I use another commands to load .eld and .ori file? or it is enough to use "abaqus job=..." and nothing else.

About volume fraction, my question is why Martin calculated volume fraction by himself in his thesis? should the modeler use it or the texgen will calculate and use it without our calculation or our assignment?
I do not know I am clear or not...but sorry if I make you confused.

I am looking forward to your reply.
thank you,

[louisepb]

Hi Maryam,

If you run from the command line then the .eld and .ori files should load automatically as they are specified in the .inp file.

TexGen will automatically calculate volume fractions using the method described in Martin's thesis. There are some places where he uses experimental data to calculate Vf and therefore validate the models.

Best regards,
Louise

[maryam_sodagar]

Thank you so much.
I've got it.

Best Regards,

[maryam_sodagar]

Hi Louise

I am so sorry again.
When I run the job in CAE or .cmd there is no difference in result and in both of them the result is the same. do you think that it may not load .eld and .ori information in both of them?
I do not know I am clear or not.

Thank you,

[louisepb]

Hi Maryam,

It will have loaded the .eld and .ori file but if you haven't provided any micro-scale information for yarn properties for different volume fractions then it won't make use of his information.

Best regards,
Louise

[yanchen291]

hi Maryam,

Not sure if you are still confused on running your inp file from Abaqus command line, as Louise has been giving you clarifications regarding that matter. Anyways, here are the detailed steps.

1. move the xxx.eld, xxx.ori and xxx.inp files all to your Abaqus work directory and make sure all those files in the same folder
2. open Abaqus command line and navigate to the folder where your files are; type "Abaqus job = xxx' (leaving out the .inp extension)

As long as the eld and ori files are in the SAME folder as the inp file, they will be loaded upon the call from Abaqus command window.

If you want to assign yarn properties in the inp file manually, open the inp file in a text editing program (i.e Notepad) and find the **Materials section. You can add or remove data in that section. If you are not sure of the data format in the material section, refer to Abaqus documents. Abaqus is very good at educating their users and there are many benchmark and example inp files you can download/see from their document site.

Regards,
Yan C.

[maryam_sodagar]

Dear Yan,

Thank you so much. All of required files are in abaqus work directory. But when I run the job using CAE or CMD line...there would be no difference in the result

[yanchen291]

Hi Maryam,

What do you mean by no difference in the result? Did the job run in CMD? If not, what were the errors?

Also, normally, the kind of inp file generated by TexGen cannot be run directly from CAE. I am not sure how you are running it in CAE.

Regards,
Yan C.

[maryam_sodagar]

Dear Yan,
I mean when I run the .odb file and plot stress-strain curve for example, there is no difference when I run the job using CMD or CAE...
Am I clear now?
Thank you so much.


Regards,

[yanchen291]

Hi Maryam,

Like I said, the inp from TexGen normally cannot be run in CAE. I am so surprised that you were able to do that. Can you maybe show a screenshot of the CMD window at the end of your simulation? What is the size of your final odb file? Abaqus generates an odb file even if the job fails and does NOT complete.

Best regards,
Yan C.

[maryam_sodagar]

Dear Yan C.

I am not able now to let you see the screenshot because I am using Tablet now.
But the jobs were completely successful and the .odb file was about 200 Mb to 600Mb

[yanchen291]

Hi Maryam,

What was wrong with the stress-strain result in your simulation?

Yan C.

[maryam_sodagar]

dear Yan C. ,
My problem was that there was no difference in stress-strain curve in 2 situation. 1.run job using cmd 2.run job using cae


Thank you,

[yanchen291]

Hi Maryam,

If a simulation completes successfully in Abaqus, the results should be the same regardless of how you submitted the job (i.e. submit through CMD or through CAE). Why are you expecting the results to be different?

Best,
Yan C.