On nonlinear viscoelastic deformations: a reappraisal of Fung's quasi-linear viscoelastic model.
On nonlinear viscoelastic deformations: a reappraisal of Fung's quasi-linear viscoelastic model.
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DOI:
10.1098/rspa.2014.0058
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发表时间:
2014-06-08
期刊:
影响因子:
--
通讯作者:
Parnell WJ
中科院分区:
文献类型:
--
作者:
De Pascalis R;Abrahams ID;Parnell WJ
This paper offers a reappraisal of Fung's model for quasi-linear viscoelasticity. It is shown that a number of negative features exhibited in other works, commonly attributed to the Fung approach, are merely a consequence of the way it has been applied. The approach outlined herein is shown to yield improved behaviour and offers a straightforward scheme for solving a wide range of models. Results from the new model are contrasted with those in the literature for the case of uniaxial elongation of a bar: for an imposed stretch of an incompressible bar and for an imposed load. In the latter case, a numerical solution to a Volterra integral equation is required to obtain the results. This is achieved by a high-order discretization scheme. Finally, the stretch of a compressible viscoelastic bar is determined for two distinct materials: Horgan–Murphy and Gent.
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