Three-dimensional growth simulation of swellable soft materials based on CS-FEM

In this paper, a three-dimensional numerical framework for modeling growth of swellable soft materials at large deformation is established based on the cell-based smooth finite element method, and multiplicative decomposition scheme gradient given. The second P-K stress Green's strain tensor are selected as work conjugate pairs, corresponding mathematical expressions stiffness matrix geometric derived. method implemented Matlab platform, isotropic anisotropic behaviors simulated respectively. results show that will inhibit expandable compared with growth. simulation calculation in existing literature. comparison characteristics morphological mode good agreement, which proves effectiveness simulating behavior deformation, able to reveal mechanical mechanism plant phenomenon nature.