A finite strain viscoplastic constitutive model for rubberwith reinforcing fillers
(English)Manuscript (preprint) (Other academic)
A three dimensional viscoplastic constitutive model for finite strains in aco-rotational explicit scheme is developed and implemented using finite elementsthat captures the amplitude dependency, commonly referred to as theFletcher-Gent effect, and frequency dependency of rubber with reinforcingfillers. The multiplicative split of the deformation gradient is utilized andthe plastic flow rule stems from an extension to finite strains of a boundarysurface model with a vanishing elastic region. The storage and loss modulusfor a 50 phr carbon black filled natural rubber are captured over a largerange of strain amplitudes, 0.2 − 50% shear strain, and frequencies, 0.2 − 20Hz. In addition, bimodal excitation is replicated accurately, even though thismeasurement data is not included when obtaining material parameters. Thiscapability is essential when non-sinusoidal loading conditions are to be replicated.By separating the material and geometrical influence on the propertiesof a component, the design engineers have the capability to evaluate more concepts early in the design phase. This also reduces the need of complexprototypes for physical testing, thereby saving both time and money.
Finite strains, Viscoplastic material, Polymeric material, Finite elements, Fletcher-Gent effect
Textile, Rubber and Polymeric Materials
Research subject Vehicle and Maritime Engineering
IdentifiersURN: urn:nbn:se:kth:diva-184890OAI: oai:DiVA.org:kth-184890DiVA: diva2:917491
QS 20162016-04-062016-04-062016-04-06Bibliographically approved