Hello, i have some problems trying to calculate the areal weight (g/m^2) of a carbon fiber braided composite.
Is there a way to measure it only knowing the weight per unit lenght (g/m), the numer of filaments for each tow (12K) and the braid angle (45°)?
Or am I still missing some information?
Thanks in advance
Yes, i know the density. But i don't know how I could measure the NT parameter
Dear Erwin
You can calculate it by the volume and density of the fibre
Hi Erwin,
Knowing the weight per unit length of the fiber is useful. The number of filaments in the fiber tow does not help as you already know the weight of a single yarn.
What you want to know is the total number of yarns in your braid and the length of each yarn. You may have to do a little math based on your angle to determine the length of the yarn. Multiply the number of yarns that are in the braid by the unit weight per length of the of the yarn. That will give you the total weight of fiber in your braid article (I'm assuming that it has already been infiltrated with a resin and made into a composite as you could just weigh the braid.)
Once you have your total weight of fiber, measure the area of the braid. Now you have your weight per unit area - your areal weight.
Hello Tom, thanks for your answer, it is very helpful!
I'm sorry to bother you but i have another question: i have just figure out that you can just consider an unit cell (like in crystals) that is repeated with a regular pattern in the woven and try to measure the areal weight of it, knowing tows lenght and how many tows are there in an unit cell as well as the info that i wrote in the first post.
Can you help me to figure out how to define this unit cell and what sort of calculations should i make to find the areal weight?
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