Abstract
The purpose of this paper is to study the effect of non-linear material behavior on predicted brain responses to external load strains. Usually brain tissue is used to display linear viscoelastic material behavior but brain tissue behaves as a non-linear viscoelastic solid for shear strains above1%.A three-dimensional non-linear model, that describes the shear softening observed in brain tissue in simple shear stress relaxation experiments, has been applied in a Finite Element (FE) head model. It was concluded that the addition of non-linear brain tissue material characteristics in current FE head models subjected to post anterior eccentric rotation shows varied pressure response.