Cavitation dynamics in a vitrimer

编号 020031902

推送时间 20211129

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Cavitation dynamics in a vitrimer

来源期刊 Acta Mechanica Sinica

期 第319期

发表时间 20210409

关键词 Vitrimer;  Cavitation dynamics;  Strain stifening;  Viscoelasticity; 

摘要 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.

服务人员 尚玮姣

服务院士 宋湛谦

PDF文件 浏览全文