UC Irvine

Biomaterials, including brain tissue, usually have nonlinear material properties. In this project, a human head simulator using the finite element method (FEM) was improved by adding an implementation of a nonlinear material model into it. The Ogden model is chosen to be implemented in this project because of its good accuracy to model the brain tissue. This work aims at improving the validity of impact simulation tests. Results show that the nonlinear model was successfully implemented into the simulator and a difference was discovered when conducting impact simulation. In the simulation using a nonlinear model, the deformation of brain tissue is larger than the deformation using a linear model.