Prof. Thomas Böhlke
Dr. J. Albiez
J. von Lautz

Methodological focus: Theory
Specialisation in mechanics desired
Internship possible

Prof. Thomas Böhlke

Topic Description:

For the design of turbine blades, an accurate description of the existing stress state using FE simulations over the entire service life of the component is essential. Due to the high mechanical and thermal loads, both plasticity and creep relaxation need to be considered. Although the stress predicted by FE simulations is relevant to the design of the component, the coupled phenomena of plasticity and creep are not yet established and validated as an industry standard. Because of these uncertainties, they cannot be used by default in design. Consequently, the full potential of the material cannot be exploited.  

The aim of this work is to implement an ABAQUS UMAT for the simulation of plasticity and creep effects. For this purpose a suitable material model has to be created. The routine should be easily extendable or modifiable by a clever structure. To validate the material model, finite element calculations will be performed and compared with experimental data.

About the company:
MTU Aero Engines is Germany's leading engine manufacturer and a global player in the industry. The company develops, manufactures, markets and supports aircraft engines of all thrust and power categories as well as stationary industrial gas turbines. Some 30% of the world's commercial aircraft are powered by MTU technology.