MODELING OF NON-ELASTIC DEFORMATION RESPONSE OF RUBBER NANOCOMPOSITES

MODELING OF NON-ELASTIC DEFORMATION RESPONSE OF RUBBER NANOCOMPOSITES

Článek recenzovaný mimo WoS a Scopus

This paper describes modeling of dynamic mechanical properties of heterogenous rubbery material with nanometer size inclusions. Model of calculation loading-unloading tensile curves heterogenous rubbery network was presented. The material was considered a tetrafunctional network of amorphous chains with solid inclusions. The chains in the vicinity of the inclusion were considered immobilized. The dynamic response was modeled as a time dependent of chains slippage in the entanglement. The model was tested by virtual loading-unlading experiment. The sample was deformed with defined deformation rate until double elongation and released back to the zero-stress. Numerical value of dissipated energy density was calculated as a surface delimited by tensile deformation and unloading curves. Heterogenous network showed non-elastic or nonlinearly elastic response. The tensile deformation curves and unloading curves were not aligned and dissipation of the energy during the loading unloading cycle was observed. The non-aligned loading and unloading curves were caused by energy barrier. Increase of energy barrier leaded to slower motion of chain in the entanglement and consequently to elastic response.

This paper describes modeling of dynamic mechanical properties of heterogenous rubbery material with nanometer size inclusions. Model of calculation loading-unloading tensile curves heterogenous rubbery network was presented. The material was considered a tetrafunctional network of amorphous chains with solid inclusions. The chains in the vicinity of the inclusion were considered immobilized. The dynamic response was modeled as a time dependent of chains slippage in the entanglement. The model was tested by virtual loading-unlading experiment. The sample was deformed with defined deformation rate until double elongation and released back to the zero-stress. Numerical value of dissipated energy density was calculated as a surface delimited by tensile deformation and unloading curves. Heterogenous network showed non-elastic or nonlinearly elastic response. The tensile deformation curves and unloading curves were not aligned and dissipation of the energy during the loading unloading cycle was observed. The non-aligned loading and unloading curves were caused by energy barrier. Increase of energy barrier leaded to slower motion of chain in the entanglement and consequently to elastic response.

Inelastic, tensile curve rubber nanocomposites

Inelastic, tensile curve rubber nanocomposites

ŽÍDEK, J.; JANČÁŘ, J.

2011

18.12.2009

GB

1790-4439

Journal of Nanostructured Polymers and Nanocomposites

5

4

Řecká republika

89

93

5