carbon fibre analysis
carbon fibre analysis
(OP)
Hello,
I have to do a finite element analysis with ANSYS of a commercial carbon fibre tube. If have no information about the different layers of the tube.
All material properties I have are the following:

I assume that the material data I have to define in ansys is:
EX=2.5*10^6
EY=8.7*10^6
GXY=0.8*10^6
PRXY=0.43
Am I right?
But with these propertys I will only be able to do a 2-D analysis with plane elements. Will it provide me satisfactory results?
What data may I use, if I want to do an analysis with shell elements or volume elements?
I would be deeply grateful if you could give me any hints.
I have to do a finite element analysis with ANSYS of a commercial carbon fibre tube. If have no information about the different layers of the tube.
All material properties I have are the following:

I assume that the material data I have to define in ansys is:
EX=2.5*10^6
EY=8.7*10^6
GXY=0.8*10^6
PRXY=0.43
Am I right?
But with these propertys I will only be able to do a 2-D analysis with plane elements. Will it provide me satisfactory results?
What data may I use, if I want to do an analysis with shell elements or volume elements?
I would be deeply grateful if you could give me any hints.





RE: carbon fibre analysis
of course, you can make a whole mess of assumptions, but then you know what "assume" does ...
Quando Omni Flunkus Moritati
RE: carbon fibre analysis
RE: carbon fibre analysis
i think you can use this material for planar elements, which includes shells and plates, and also 3D (solid) elements ... why not?
Quando Omni Flunkus Moritati
RE: carbon fibre analysis
And what parameters can I define for EZ, GYZ, GZX, PRYZ, PRXY if I use 3D elements?
RE: carbon fibre analysis
if this is "real work" i'd suggest calibrating your model by testing. deflections are the easiest thing to measure.
Quando Omni Flunkus Moritati
RE: carbon fibre analysis
RE: carbon fibre analysis
RE: carbon fibre analysis
Quando Omni Flunkus Moritati
RE: carbon fibre analysis
Could you explain that more precisely?
RE: carbon fibre analysis
Why use solid elements to model a tube? Unless its a thick wall, use a multi layer shell like SHELL281 and set up your ply data with the SECDATA cards. Also, I think you're need some data for the matrix. Also also, you might want to read up abit on composite materials. I took a class on plastics and we used Mechanical Properties of Solid Polymers by Ward and Sweeney. See chapter 8.
Rick Fischer
Principal Engineer
Argonne National Laboratory