Temperature dependency of a viscoplastic materialmodel derived for rubber with reinforcing fillers
(English)Manuscript (preprint) (Other academic)
The temperature dependency of a finite strain time domain viscoplastic materialmodel for filled rubber is studied over the ranges 0.2-50% shear strain,0.8-17.9 Hz and 0 to 85 C. The storage and loss modulus of a 54 phr carbonblack filled natural rubber are accurately captured by the model at eachtemperature, thereby supporting the notion that a viscoelastic network inseries with a plastic element is suitable material model for rubber with reinforcingfillers. The variation of the moduli as a function of temperatureis non-linear, with a stronger dependency at lower temperatures. Therefore,a set of measurements are representative in a broader temperature range athigher compared to lower temperatures. Highly filled rubber are not thermorheologicalsimple materials, and an elevated temperature influences the stiffnessand dissipation differently at low and high strain amplitudes. Therefore,relying merely on low strain amplitude measurements can led to erroneousconclusions, when strain amplitudes in operational conditions are moderate to large. The presented modelling technique enables an accurate evaluationbetween compounds, early in the development phase of new components inindustrial applications.
Filled elastomers, temperature dependency, amplitude dependency
Textile, Rubber and Polymeric Materials
Research subject Vehicle and Maritime Engineering
IdentifiersURN: urn:nbn:se:kth:diva-184891OAI: oai:DiVA.org:kth-184891DiVA: diva2:917492
QS 20162016-04-062016-04-062016-04-06Bibliographically approved