A MPHETS (mixed porohyperelastic-transport-swelling) model is presented in which a soft hydrated tissue is viewed as a continuum composed of an incompressible porous solid (fibrous matrix with FCD, fixed charge density) that is saturated by anincompressible mobile fluid (water) in which mobile positively (p) and negatively (m) charged species are dissolved. This model is implemented using a FEM (finite element model) including inherent geometric and material nonlinearity and coupledelectrical/ chemical/mechanical transport processes associated with mobile charged species. Here, we present a MPHETS theory and FENI based on Frijns et al. (1997) that extends our earlier PHETS model (Kaufmann 1996, Simon et al. 1998). The anisotropicformulation can be utilized once appropriate experimental data and material properties are available.
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