Simulation of the Tension Strength Test Composites matierial

[madmonkey]

madmonkey (Automotive)
16 May 05 14:15
HI ALL
i am trying to simulate in ANSYS the Tension Strength Test (TST).The TST has been already done. i got the values(grapf stress-strain).
Now im traing to create the simulation of the TST in ANSYS. I got all the materials values:

fiber E=73GPa, V(volume)fiber=0.32% Poisson=0.25
matrix e=3Gpa Poisson=0.316

number of layers 14 (in ansys i use 29 layers, first and last layers are half height of matrix, plus another 13 of matrix in full heihgt and 14 layers of fibers)
example
1st layer half height of matrix
2nd layer fiber full height
3rd layer matrix full height
...
29th layer half height of matrix


i got the dimension of the sample (whole and the middle section).I'm modeling only the middle section.
i'm using the element SOLID46.
but the solution is different as a TST.

test value for the composite is around 16GPa
but in Ansys it is only 3GPa (look like the same as a E of matrix)

any tips where i make the mistake?

thanks for all answers

Vladimir Zachar