This paper summarizes the damage tolerance requirements that are applied to Air Force engine development programs. These requirements are an integral part of the Engine Structural Integrity Program (ENSIP) contained in MIL-STD-1783 (USAF) dated 30 November 1984. Application of damage tolerance requirements to existing inventory engines (F100 and TF34) and to the development programs (F100-PW-220, F101-GE-102, F110-GE-100 and F109-GA-100) have resulted in implementation of enhanced nondestructive evaluation methods (i.e, eddy current) at manufacturing and at field/depot. Experience has shown that these inspections have been successful in detecting early cracking and accelerating corrective actions. It has been highlighted that several development efforts in the last five years have identified FPI process improvements that must be implemented within industry and Air Force depots to improve flaw detection reliability. The need to quantify detection reliability for imbedded defects is also identified. The engine development process has been evolutionary in terms of application of upgraded requirements. The new process is contained in ENSIP. Recent experience clearly demonstrates that the damage tolerance requirements is cost effective when assessed on a life cycle basis.
Damage tolerance design concepts for military engines
Schadensgrenzenfestlegung fuer Triebwerke von Militaerflugzeugen
Damage Tolerance Concepts for Critical Engine Components, AGARD Conf. Proc. ; CP-393 , Oct ; 3-9
1985
9 Seiten, 22 Bilder, 2 Quellen
Conference paper
English
Damage tolerance design concepts for military engines
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