Accession Number : ADA267718


Title :   Impact of Materials Defects on Engine Structures Integrity (L'Impact des Defauts des Materiaux sur l'Integrite des Structures des Moteurs)


Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267718.pdf


Report Date : Apr 1993


Pagination or Media Count : 118


Abstract : Even though we have made significant progress in increasing reliability of critical components of aeroengines, we have far too many failures in both military and commercial engines. As well, maintenance costs, warranty costs (spares) and liability costs are too high. In addition, designers of aeroengines will undoubtedly always seek to increase performance and efficiency as well to increase the life of components. At the same time, it is desirable to decrease the need for inspections of components because, in a sense, this adds no value to the product and also causes down time. Designers attempt to expand performance and increase efficiency by increasing combustion and turbine inlet temperatures and increasing operating stress/strains on the components by either increasing material strength or decreasing component size (weight) or both. As well, it is desirable to minimize risk of unexpected failure while at the same time increasing component life


Descriptors :   *AIRCRAFT ENGINES , *STRUCTURAL ANALYSIS , *DEFECTS(MATERIALS) , MANUFACTURING , NONDESTRUCTIVE TESTING , FATIGUE(MECHANICS) , QUALITY ASSURANCE , FAILURE(MECHANICS)


Subject Categories : Aircraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE