Data analysis-elastic properties computational

[louisepb]

Hi,

I'm afraid that I don't have time to run the simulation at the moment but, in any case, there seem to be discrepancies in the data for the thickness of the unit cell. The dimensions in the paper are inconsistent and also don't match the thickness in your model. The best course of action would probably be to contact the authors of the paper to find out exactly what data they used to create their results.

Best regards,
Louise

[duc hai]

hi,
thanks for suggest but befor I contacted with the author however, there was no help. after that, I go to forum, I hope have got person can help me with this problem.
I hope you can help me check what is the problem in my model. I have checked the dimention of unit cell, it is correct.
thank for your help.

[louisepb]

Hi,

I hadn't noticed the dimensions in figure 1 in the paper which do seem to correlate with your model (even if not exactly with the unit cell size given). I think that you should check the voxel export. It looks like they have used 50x50x20 in the paper (although this isn't stated explicitly but can be deduced from the figures) where you have used 100x100x5. This could well be a source of error as (as I said in a previous post) I don't think that 5 voxels is enough to capture the geometry accurately.

Hope that helps,
Louise

[duc hai]

hi,
I have modified with your advice, but have not got good results. According to the documents on the links it seems we have skipped a step is How to edit file .inp
thanks so much

[louisepb]

Hi,

The only reason that you might need to edit the .inp file is if you wanted to include a micro-scale model. This could be a possible source of error as there are no properties included in your model which would enable realistic volume fractions to be calculated (if you look in the .eld file you will see that the Vf figures are all zero). There isn't, however, any mention in the paper of whether they have used a micro-scale model but I would expect this to affect the results.

I'm afraid that I can't do much more to help you. I don't know why the answers are different but, in the absence of detailed information about the model setup from the authors I'm not sure what else to suggest. It looks like the lead author has now moved to a different institution so you might be able to contact him there.

Sorry not to be able to give a better answer,
Louise

[duc hai]

hi,
I appreciate your enthusiasm! While my English is not good, you still try to explain it to me. I will learn more in other information. I am very happy with your helpful. I hope next time if have problem have person help me same you.
Thank so much and good luck.

[duc hai]

Hi Louisepb,
I sorry, now I have a question would like to ask you. I hope you can help me. I attachment in here.
My simulation U2, U3 why have got data? in the picture haven't got color?
thanks for your help.

[louisepb]

Hi,

Alpha is the coefficient of thermal expansion.

I'm afraid that I don't know what you have done in order to produce the images so can't comment on what they show. I don't think that this is really a TexGen issue but more of an Abaqus simulation issue. You might be better off asking this question on an Abaqus forum.

I have deleted your message on the meshing thread as it repeated this one and wasn't relevant to the thread.

Best regards,
Louise

[duc hai]

hi,
I sorry for asking in the mesh discuss. They writed "The displacement (U1,U2,U3) distributed within a unit cell in a Coordinate system: x—warp, y—weft, z—through thickness" in the page 5 and 6 in this links
http://upfile.vn/F~BCuVZCNQGQ
They didn't mention this problem in Abaqus.
And I have question in the picture attachment.
Thanks so much

[louisepb]

Hi,

I'm afraid that I'm not an Abaqus expert so I can't help you with this question. This is really more of an FE/Abaqus question rather than a TexGen question so this forum is probably not the best place to ask. You would be better to find an Abaqus forum to post questions about running simulations.
Best regards,
Louise

[duc hai]

hi,
Thanks for your helpful, the last question I would like to ask you about is how to change the Vf file in .eld. where is the Vf? I want change Vf.
thanks so much

[louisepb]

Hi,

As shown in the image the volume fraction is the 4th parameter on each row. In order for TexGen to calculate this value you need to set up the material properties in TexGen (using the same dialog that you use to set up the Young's modulus etc).

Best regards,
Louise

[duc hai]

hi,
I really have set these issues, I attachment in here, why Vf still =0? and where are the Yarn linear Density, fibre Density...?
If Vf =0 the results are not correct.
thanks for your help.

[louisepb]

Hi,
TexGen will either use the fibre area, linear density/fibre density or fibre diameter/fibres per yarn to give the fibre area used to calculate volume fractions. These seem to be inconsistent in the data you have entered. By default TexGen will use the first of these if it has been entered so in this case it should be using the Total Fibre Area value.

Have you checked if there are any error messages which indicate why a correct volume fraction hasn't been calculated? Failing that I can only suggest that you send me the model and I'll try to see why the Vf doesn't seem to be being calculated.

Best regards,
Louise

[duc hai]

hi,
thanks Louisepb.
1. If Yarn Linear Density and Fiber Density =0 the results have got what effect?
2. I calculation the Total Fiber Area in the Fig is true or false?
3. I send to you file .INP, ELD, .ORI. Could you help me check all. http://upfile.vn/xdFm65BtNCBC
thanks so much