Steeb group

The Steeb group at the Institute of Mechanics / Functional Soft Materials Lab (FSM), is looking for a doctoral researcher with a strong focus on macroscopical numerical modeling and simulations of mixed conductive soft materials in the framework of finite deformations. 

The project is focusing on continuum-based modeling approaches based on the Finite Element Method (FEM). Core of the project is the development of a thermodynamical consistent model which especially allows to describe large volumetric swelling strains (as part of finite deformations). Furthermore, we aim to describe the evolving rate-dependent (viscoelastic) material response, e.g. during electrochemical doping. The model should be based on a multiplicative split of the deformation gradient into a rate-dependent (volumetric) swelling part, as well as in a deviatoric elastic and inelastic contribution. Modeling framework is the Open Source FEM package CalculiX. As in mixed conductors the rheological material response strongly depends on the doping state and the uptake of ions, we are aiming to develop viscoelastic materials models with a continuous relaxation spectrum using fractional derivatives.

For the project an engineering, physics or mathematics background is beneficial. The work will involve the development of a continuum-based model, the numerical implementation into the FEM package CalculiX, validation and testing, and the application to architectured devices. 

A close collaboration with the other doctoral researchers within the GRK2948 is expected.