about the NR(55phr CB) test data

[yongby]

There might be a problem for the planar tension data, I think. If the tested specimen was not deforming in a nearly homogeneous state, its test result will not be reliable. Another reason may be in the preparation technique of the specimens which might induce the noncoincidence of the material properties.

[Jorgen]

Hello Yongby,

The experimental data was provided to me by another PolymerFEM.com member. I agree, the experimental data is slightly fishy, I would not think that the experimental curves should cross. It is possible to neglect part of the data in an effort to clean it up.

Cheers,
Jorgen

[moe]

hi jörgen!

could you tell me the meaning of the different material parameters shown in the experimental curves?

i found out that the 2 parameters for neo hooke are shear and bulk modulus.
so i could convert them for use in abaqus.
i also found out the meaning of the mooney rivlin parameters.

but what is the meaning of the parameters of the other models (especially arruda-boyce, yeoh, van der waals)?

thx moritz

[Jorgen]

Hi Moritz,

You can read about the material parameters for the neo-hookean, Arruda-Boyce 8-chain model, and the Yeoh model on the following page (http://www.polymerfem.com/modules.php?name=News&file=article&sid=59&mode=&order=0&thold=0)

Jorgen

[moe]

hi jörgen!

thanks a lot!

didn't find that page..sorry..

moritz