Development and verification of a material model for prediction of containment safety of exhaust turbochargers

For predicting the containment safety of turbochargers against failure of rotors at elevated temperatures and dynamic loading the complex deformation and damage behaviour of the respective materials has to be determined by appropriate experiments and on the other hand the temperature and strain rate dependency has to be described by a material model to simulate the component behaviour under these complex loading conditions. The investigations focus on the cast iron alloy EN-GJS-400 with nodular graphite. Its mechanical behaviour under uniaxial and multiaxial tension as well as under compression and shear loading has been investigated for a variety of loading rates and temperatures.