Hi Experts,
I'd like to use TexGen for calculating homogenized material parameters from an given dry linen cloth.
But I can't use Abaqus as solver because of the lack of license.
I wonder if it could be possible to transform the approaches of TexGen-Abaqus-Export into a new strategy to create a nastran model from TexGen mesh by using nastran pre processsor like NX CAE.
If there is a chance to do so, I would try to transform all properties into a model in NX CAE.
That's why my first questions:
1. Is there a way to build a handmade model with all information in a pre processor for calculation of the homogenized material parameters of assembled textile?
2. Was Abaqus selected for calculation because of special features in it which other solver do not provide?
3. What are the main steps in create a handmade model?
I am at the beginning of dealing with TexGen and a missing license is a big "stumbling block" in this case.
I've read a lot of texts about TexGen but could not find appropriate documents for my intention.
Could you give me first advices where to search for necessary information?
After reading I think the following points have to be worked out:
- mesh of yarns (no matrix),
- materials with proper orientation inside the yarn,
- contact description between different parts of yarn surfaces,
- displacement constraints,
- multipoint constraints to couple the different flanks of mesh,
- pressure plates,
and then finally:
- extraction of homogenized material parameters
That are a lot of questions, I know. But is there a chance to cope all the problems?
All recommendations are welcome!
Greeting, Michael
Transformation into NASTRAN
Moderators: Martin, Developers
Re: Transformation into NASTRAN
Hi Michael,
The Abaqus output has been developed in TexGen because that is the solver that we use here at Nottingham.
I think that there are a couple of ways that you could go about achieving your export requirements:
1. Use the Abaqus Dry Fibre Export function. This will give you a .inp file which contains all of the node and element information. It will also give you contact surfaces and compression plates. It does give a set of boundary conditions but you would need to check that these meet your requirements. The .ori file gives orientations for each element and the .eld file gives volume fractions.
Having created these files you could write a script to read them and write files in the correct format for Nastran.
2. Export the model using the File->Export->STEP or IGES file options. I assume that NX CAE would be able to import these formats. I haven't used these programs but I'm assuming they will then mesh the model. Once you have your mesh you could then find the centre points of the elements and write a script to interrogate the TexGen model to find orientation and volume fraction information at these points.
The volume and surface mesh export functions can be exported as VTL .vtu files which you may also be able to use.
I hope that helps,
Louise
The Abaqus output has been developed in TexGen because that is the solver that we use here at Nottingham.
I think that there are a couple of ways that you could go about achieving your export requirements:
1. Use the Abaqus Dry Fibre Export function. This will give you a .inp file which contains all of the node and element information. It will also give you contact surfaces and compression plates. It does give a set of boundary conditions but you would need to check that these meet your requirements. The .ori file gives orientations for each element and the .eld file gives volume fractions.
Having created these files you could write a script to read them and write files in the correct format for Nastran.
2. Export the model using the File->Export->STEP or IGES file options. I assume that NX CAE would be able to import these formats. I haven't used these programs but I'm assuming they will then mesh the model. Once you have your mesh you could then find the centre points of the elements and write a script to interrogate the TexGen model to find orientation and volume fraction information at these points.
The volume and surface mesh export functions can be exported as VTL .vtu files which you may also be able to use.
I hope that helps,
Louise