Homogenization of a viscoelastic model for plant cell wall biomechanics

Mariya Ptashnyk, Brian Seguin

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Abstract

The microscopic structure of a plant cell wall is given by cellulose microfibrils embedded in a cell wall matrix. In this paper we consider a microscopic model for interactions between viscoelastic deformations of a plant cell wall and chemical processes in the cell wall matrix. We consider elastic deformations of the cell wall microfibrils and viscoelastic Kelvin–Voigt type deformations of the cell wall matrix. Using homogenization techniques (two-scale convergence and periodic unfolding methods) we derive macroscopic equations from the microscopic model for cell wall biomechanics consisting of strongly coupled equations of linear viscoelasticity and a system of reaction-diffusion and ordinary differential equations. As is typical for microscopic viscoelastic problems, the macroscopic equations governing the viscoelastic deformations of plant cell walls contain memory terms. The derivation of the macroscopic problem for the degenerate viscoelastic equations is conducted using a perturbation argument.
Original languageEnglish
Pages (from-to)1447-1471
Number of pages26
JournalESAIM: Control, Optimisation and Calculus of Variations
Volume23
Issue number4
Early online date1 Sep 2016
DOIs
Publication statusPublished - Oct 2017

Keywords

  • Homogenization
  • two-scale convergence
  • periodic unfolding method
  • viscoelasticity
  • plant modelling

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