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Cavitation dynamics in a vitrimer

Cavitation dynamics in a vitrimer Vitrimer is a polymer network with dynamic covalent bonds, which can be dynamically broken and reformed. Thanks to the dynamic covalent bonds, vitrimer behaves like an elastomer at high deformation rate or low temperature but a viscous fluid at low deformation rate or high temperature. In this article, we study the cavitation dynamics in a vitrimer, which is known to be an important damaging mechanism in it. In the formulation, a nonlinear three-dimensional rate-dependent constitutive model for the vitrimer is adopted, in which both of the strain stiffening and the kinetics of dynamic exchanging reactions are considered. The theory predicts strong dependence of the cavitation dynamics on the loading rate. The computational results may help to reveal some critical insights into the rate-dependent fracture in vitrimer.Graphic abstract[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Acta Mechanica Sinica" Springer Journals

Cavitation dynamics in a vitrimer

Song, Zhaoqiang; Cai, Shengqiang
"Acta Mechanica Sinica" , Volume 37 (5) – May 1, 2021
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References (20)

Publisher
Springer Journals
Copyright
Copyright © The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag GmbH Germany, part of Springer Nature 2021
ISSN
0567-7718
eISSN
1614-3116
DOI
10.1007/s10409-021-01078-y
Publisher site
See Article on Publisher Site

Abstract

Vitrimer is a polymer network with dynamic covalent bonds, which can be dynamically broken and reformed. Thanks to the dynamic covalent bonds, vitrimer behaves like an elastomer at high deformation rate or low temperature but a viscous fluid at low deformation rate or high temperature. In this article, we study the cavitation dynamics in a vitrimer, which is known to be an important damaging mechanism in it. In the formulation, a nonlinear three-dimensional rate-dependent constitutive model for the vitrimer is adopted, in which both of the strain stiffening and the kinetics of dynamic exchanging reactions are considered. The theory predicts strong dependence of the cavitation dynamics on the loading rate. The computational results may help to reveal some critical insights into the rate-dependent fracture in vitrimer.Graphic abstract[graphic not available: see fulltext]

Journal

"Acta Mechanica Sinica" – Springer Journals

Published: May 1, 2021

Keywords: Vitrimer; Cavitation dynamics; Strain stiffening; Viscoelasticity

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