Lifetime prediction of a rocket combustion chamber wall by a viscoplastic damage model

Abstract

Regeneratively cooled nozzle structures of Reusable Launch Vehicles (RLV) belong to the most critical components of a space shuttle main engine. The so-called doghouse effect is a failure mode in the rocket combustion chamber wall, which has been observed experimentally. Within the Collaborative Research Centre SFB-TR 40 of the German Research Foundation (DFG), new technologies for the future space-transport-systems are being developed. By using a new continuum mechanical approach, motivated by a rheological model, we are able to reproduce the doghouse effect. Moreover we intend to give reliable lifetime predictions for rocket combustion chamber structures so that in future components can be tested virtually instead of conducting real experiments.

Stress evolution in thermal barrier coatings for rocket engine applications

“…Different failure mechanisms have been discussed, for example ratcheting (Fassin et al 2014;Quentmeyer 1988) or blanching (cyclic oxidation and reduction in theoxygen/hydrogen atmosphere Ogbuji 2005).…”