PA 6 Glassfiber

[Honeyman81]

Hello,

I have just read this post about PA 6.6. I have to do my final exam now on university. In this I have to do an Finite element analysis of a PA6 part reinforced with 30% glassfiber.

One of the first questions I have is how to handle the anisotropic/isotropic problem. For me is will be too much effort to include the anisotropic material behaviour, so have to do the analysis isotropic (I was said that it is very common in practical work to use isotropic because of time and money).

My problem is, how to use material data then? Are there any factors to correct the Material constants in this case? Can anybody help me with that? Is there any literature about that on the net or elsewhere?

It would be very nice if someone could answer.

[rumhrg]

Short fiber reinforced plastics are certainly isotropic and you can use an isotropic model for FEM analsyis. You can find mechanical properties as well as other physical data of a huge number of polymers freely in www.matweb.com. For example Nylon 6 with 30% reinforcement has an average tensile modulus of 7.5 GPa and poisson's ration of 0.35.
Hope this helps you. Contact me if you need further information m.h.r.ghoreishy@ippi.ac.ir