inp file and composite tensile test

[Mhb-1370]

Hi everyone
I am a new member of this forum
I made a composite using the texgen program. Now I want to analyze its tensile, flexural and impact properties using Abacus software.
After making the composite and giving the properties to the yarns and resin, I extracted it as an abaqus voxel mesh file (. Inp).
When I import the file in Abacus as a model, it is an orphan mesh (I couldn't import the model using the run option) I meshed the composite using the create geometry from mesh option in plug-in.
The questions I have are:
1- What parts of the Abaqus program should I change or add for tensile test?
For example, in part section composite displayed and in the property section there are composite and yarn properties.
Which parts should I change?
2- What is the difference between adding a .inp file and adding it with run?
3- Do you have a video of the steps of a composite test (made by texgen) in Abacus program?
thank you

[louisepb]

Hello,

Welcome to the TexGen forum!
There are instructions for predicting mechanical properties using the Abaqus voxel .inp here: http://texgen.sourceforge.net/index.php ... and_Abaqus

Hopefully this will give you some understanding of what is going on, particularly with reference to the boundary conditions. Please note that you can't import the .inp into CAE and then run it because of the equations with multiple node sets. You need to run the .inp file from the command line (as described in the link).

Best wishes,
Louise

[Mhb-1370]

thank you, dear Louise
I run the inp file from the command line, but when I run Abaqus and import the odb file, the file is displayed in the visualization section.
There is no model in other parts such as part and property.
what can I do?

[louisepb]

Hello,

I'm not sure what you're trying to do. If you've run the analysis you will be able to see the results in the visualisation. If you want to perform a different analysis then you will probably need to export from TexGen without any boundary conditions. This will enable you to import the nodes and elements which you can then apply boundary conditions to as you wish. As you observed before this is an orphan mesh. There isn't an associated model.

Hope that helps,
Louise

[Mhb-1370]

Thanks dear Lewis. I was able to convert the inp file to odb and do a tensile test on the composite once. This time, unlike before, all the properties of the composite and yarn are listed in the property section. But I do not understand the meaning of this part of pdf.
1-I did steps 1 and 2 in this pdf file. Can you guide me for steps 3 and 4?
2-do you think resin numbers are correct? I entered 3000mpa in the texgen program, but here it is 3 billion
3-Are the steps done correctly? Because the program did not give an error
4-Do you have a video or text tutorial from texgen to abaqus?

[louisepb]

Hello,

I'm not sure which pdf you are referring to. Do you mean the tutorial that I sent a link to earlier?If so, just follow the steps and you should be able to extract the material properties.
3000MPa is 3 billion Pa.
If the job has run without errors then that should be fine. You should be able to use the scripts supplied with TexGen to extract the material properties.
I'm not sure what you mean by a tutorial from TexGen to Abaqus. All of the tutorials are available either in the Documentation section on the website or on GitHub: https://github.com/louisepb/PurdueWorkshop2019 and https://github.com/louisepb/NCCWorkshop2019. There are also sample scripts and scripting guide on GitHub.
If you need help using Abaqus then you need to either get help from someone at your institution or ask on an Abaqus users' forum.

Best wishes,
Louise

[Edward Gao]

Hello Louise,

I am a new member of this forum. I meet some problems when I follow the link: http://texgen.sourceforge.net/index.php ... and_Abaqus to predict mechanical properties via Abaqus Voxel .inp file:

1- I follow this tutorial step by step but ABAQUS always show errors like Attachment Fig.1 when Run Script, no matter I export "Material Continuum" or "Single Layer RVE" boundary conditions from TexGen. Could you help me?
2- How can I modify load parameters to realize tension/compression? I'm not sure which type of load was applied under TexGen default export .inp file to get the result of Fig.2. Can I customize boundary conditions through ABAQUS CAE-Import-inp.file ?

thank you very much!

Best Regards,

Edward Gao

[louisepb]

Hello,

If you want to understand how the voxel .inp file is set up you need to read the paper by Li in the tutorial which describes everything.

I'm afraid that I'm not an Abaqus expert so if you want to change the loading you will need to consult the Ababqus documentation. If you change the boundary conditions please note that in the input file they are set up with equations with node sets with multiple nodes which can only be run from the command line - CAE can't cope with these.

I'm not sure why you're getting the error. If you want to share the model or input file I could try and see what the problem is.
Best wishes,
Louise

[Zeynep Nur Akyazıcı]

Hello everyone,
I opened my three-dimensional orthogonal composite design as .odb file in Abaqus. However, the file is displayed in the visualization section.There is no model in other parts such as part and property.when I want to see the analysis results and the deformed shape, it gives an error: "results for the current deformed variable are not available for one or more nodes contained in the model". It also shows as 'Increment:0'. It also shows up as 'step: Isothermallinearturbationstep'. How can I see the deformed shape and analyzes?

Best regards,
Zeynep Nur Akyazıcı

[louisepb]

Hi Zeynep,
The odb file is displayed in the visualisation section as this contains the analysis results. The analysis is set up to apply loads to a set of nodes defined by constraint drivers. The material properties are then extracted using the scripts provided with TexGen and which use results from the odb file. I suggest that you read the paper by Shuguang Li and look at how the method is implemented in the .inp file to understand what is going on.

If you want to do a different type of analysis using the TexGen model you will probably need to export the mesh without boundary conditions and then set these up in Abaqus for the simulation that you want to run.

Hope that helps,
Louise

[Zeynep Nur Akyazıcı]

Hi Louise
Thank you information. I solved problem.

Best,

Zeynep