On the modelling of highly elastic flows of amorphous thermoplastics

Lukasz Figiel, C. Buckley

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    Abstract

    This paper investigates an important problem of kinematic structuring of nonlinear constitutive models within the framework of large deformations. It compares systematically two generic kinematic approaches based on the additive decomposition of the rate of deformation tensor, and the multiplicative split of the deformation gradient. The main conclusion resulting from this paper is that both approaches can provide identical results, depending on the definition of the viscous part of the continuum spin tensor. As a result, the results of this paper can help scientists and engineers in choosing the most robust and accurate kinematic approach to build their nonlinear constitutive models for many practical applications such as simulations of nonlinear viscoelastic flows (with a large elastic component) of amorphous polymers.
    Original languageEnglish
    Pages (from-to)389-395
    Number of pages7
    JournalInternational Journal of Non-Linear Mechanics
    Volume44
    Issue number4
    DOIs
    Publication statusPublished - May 2009

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