TexGen Yarn properties

[viv12Dhimole]

Dear Dr. Louise Ji,

I am assigning material properties in TexGen for yarn. It is showing yarn linear density in Kg/m and fiber density in kg/m3 so is this miss spell or there is some meaning of this too.

and if I put density for fiber volume fraction and select the yarn for showing its volume fraction it shows yarn fiber volume fraction,so is it the volume of fiber in the yarn,

and what shows by a domain volume fraction like is it except yarn volume.

and further, if I import that model in Abaqus with mm unit and density giving in m unit will there is unit inconsistency or fine.

Best Regards
Vivek

[viv12Dhimole]

Hello Dear Louise Ji,

Kidly provide an answer.

Best Regards

[viv12Dhimole]

Dear Dr. Louise Ji,

If I want to define fiber volume fraction of yarn is 52% then I am giving the properties for yarn so linear density and fiber density are in kg/m3 and fiber diameter I have to put in a meter like (0.000006m) and then if I am increasing the no of yarn in a domain then domain fiber volume fraction is also increasing so if I want to know yarn fiber volume then i can see from selecting the yarn but if domain fiber volume fraction is like 15 % only then what is the meaning of that am I doing right or wrong because domain fiber volume fraction is low but yarn fiber volume fraction I can manage from yarn properties so it is showing 53%.
May you tell me if I select 3000 fiber for yarn then is it model like that ( will it also affect the further results)and what is the significance of Domain fiber volume fraction.

Also, I want to familiar with repeat yarn function, what does shows x y z in that, is its distance for repetition then there are 3 x y z row and column.

Please help to solve these, waiting for your positive answer,

Thanking you


Best Regards
Vivek

[louisepb]

Dear Vivek,

If you do a search for 'volume fraction' in the forum then you will find several threads which discuss the calculation of volume fractions. TexGen uses the yarn data to calculate the volume fraction within the yarn and, from this, the volume fraction for the domain. TexGen does not model individual fibres but uses information about number of fibres within a yarn to calculate volume fractions where appropriate.

You can edit the units in the yarn properties dialog to use whichever units is convenient for you. TexGen will output these in consistent units when it does an export to Abaqus.

To understand the use of repeats you should familiarise yourself with the TexGen modelling theory, either from one of the presentations or Martin Sherburn's thesis http://texgen.sourceforge.net/index.php/Documentation

Best wishes,
Louise

[viv12Dhimole]

Ok Dear Dr. Louise,

I go through that if face any question discuss to you again.

Thank you

Best Regards
Vivek

[Zeynep Nur Akyazıcı]

Hi,
I'm modelling 3D orthgonal woven. In the Yarn Properties tab, Ex, Ey and Ez values must be entered for the yarn. However, the yarn I use has only one Young modulus value.For example E=72.5 Mpa. Should this value be entered the same for all or should I enter different values?

Best,

Zeynep

[louisepb]

Hi Zeynep,

It would normally be expected for Ey and Ez to be lower than Ex. See the example values here: https://texgen.sourceforge.net/workshop ... alysis.pdf You may need to do some experiments or analysis to obtain values or find them in literature.

Best wishes,
Louise