The Assessment of Engine Usage Data
Abstract
Within aero gas turbine engines, fracture critical parts are defines as those whose failure could hazard the entire aircraft. Because of the potentially catastrophic impact of such a failure, a fundamental airworthiness requirement on all aero gas turbine engines is that the operational life of these parts is managed to ensure this does not happen. Consequently, considerable effort is devoted to deriving methods for estimating the usable life of such components, to ensure that the probability of in-service failure is acceptable low. Such methods must accurately account for the basic material properties, the impact of the various manufacturing processes employed, and the operational loads the components will be subjected to during service usage. In general terms, the lives are derived on the basis of laboratory specimen test and/or full scale component rig tests, finite element stress analyses, together with appropriate statistical models of fatigue behavior. A vigorous and ongoing research activity is devoted to developing and refining these methods, and to ensure that they are kept up to date with changes in the basic engine technology.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2003
- Accession Number
- ADP014132
Entities
People
- D. P. Shepherd