Mooney Rivlin material data for viton

[los_lobos]

Hello,

This appears to be a superb website for people doing analysis of elastomers and plastics.

I occasionally do FEA with elastomeric parts (typically seals) using MSC.Marc. I am now doing an analysis that requires temperature dependent properties for a viton seal. Naturally I would like data available in terms of the Mooney Rivlin constants, but seeing as that's probably a pipe dream, I would be willing to settle for anything that gives me a rough estimate of how the stress-strain behavior in compression varies when going from room temp to 45 C above RT.

Is there a source somebody can point me in the direction of? I'd be most appreciative.

Thanks,

Mark Lobo
NovaComp Engineering

[Jorgen]

For most elastomers both the storage modulus and loss modulus go slighly down with increasing temperature. That is, both the stiffness and the amount of hysteresis goes down somewhat with increasing temperature.

I do not have actual data for Viton, but my guess would be that the stiffness is reduced by about 5% to 15% when going from RT to RT+45. So to first order, you can adjust your hyperelastic parameters to reflect a reduction in stiffness of about 10% or so.

You might find more info from a detailed literature search, if not, you can always determine the behavior through experiments.

Jorgen

[los_lobos]

Thanks,

Actually I do have data for RT, which was experimentally determined. Trouble is my client has nether the time nor money to test he needs the results by Dec 21. Well, I'll look some more in the literature. I have found one paper by TL Smith in IBM J. of Research and Development, "Strength and Related Properties of Elastomeric Block Copolymers." This paper I got via a google search. I printed it out, but there is no volume number and year on the printed copy.

Anyway, your suggestion is good. i can create a uniaxial test specimen model and if I can locate some data for the 100% elongation modulus at various temperatures, I can adjust my hyperelastic parameters to reflect this.

Thanks for your time and suggestions.

Mark