Dr. J. Riccius
The life cycle of combustion chamber structures is limited due to the following specific loads:
• use in major temperature ranges (25 K – 1000 K) and high thermal gradients
• exposition to liquid oxygen with pressures of up to several 100 bars
• exposition to hydrogen and hydrogen-rich hot gas with pressures of up to several 100 bars
• interaction with oxidating and reducing flows
• cyclic mechanical and thermal loads.
The research priorities of the Structural Analysis Group are thermo-mechanical analysis, material behaviour under cyclic load changes, hydrogen embrittlement and the impact of reducing and oxidating flows on material properties. Thermo-mechanical fatigue is investigated on a test bench (TMF test bench, Training and Model Forest) where cyclical loads with representative heat flows of up to 20 MW/m2 can be simulated under controlled conditions. Our aim is to optimise and conceive models to describe failure processes and anticipate life cycles.