Identification of mechanical models and parameters for alginate‐based hydrogels as proxy materials for brain tissue

Abstract

Due to their qualitatively similar mechanical behavior to brain tissue, the present study focuses on the modeling and identification of material parameters for alginate-gelatine hydrogels. A generalized Maxwell model is used to describe its finite viscoelastic response. By comparing the experimentally recorded data with finite element simulations, we define a least squares problem to identify appropriate material parameters. We show that we can parameterize the model to well fit each loading mode individually.