Large deformation and fluid permeation in polymer gels
Fernando Pereira Duda1; Angela C. Souza2
1 Programa de Engenharia Mecanica & Programa da Engenharia da Nanotecnologia - COPPE - UFRJ; 2 Departamento de Engenharia Mecanica - UFF
doi:10.20906/CPS/CILAMCE2017-0801
Resumo
A polymer gel is a two-component material composed of an elastic cross-linked polymer network and a fluid that permeates the interstices of the network. Such materials exhibit unusual and complex phenomena as a result of the coupling between large deformation and fluid permeation. In this paper, we apply the methods of continuum mechanics to describe the mutual interaction between large deformation and fluid permeation in polymer gels. The basic tenet here is the conceptual view of this body as a platform for two interdependent phenomena: a macroscopic (mechanical) phenomenon due to the deformation of the network and a microscopic (chemical) phenomenon due to the permeation of the fluid through the network. Applications of the theory are provided within the context of wrinkling instabilities, volumetric phase transition and cavitation. This paper builds upon and extends [1] and [2]. [1] Duda, F. P., Souza, A. C., & Fried, E. (2010). A theory for species migration in a finitely strained solid with application to polymer network swelling. Journal of the Mechanics and Physics of Solids, 58(4), 515-529. [2] Duda, F. P., Souza, A. C., & Fried, E. (2011). Solvent uptake and cavitation. Journal of the Mechanics and Physics of Solids, 59(11), 2341-2354.
Palavras-chave: polymer gels; large deformation; species migration