PREDICTING THE RELIABILITY OF CERAMIC TURBINE COMPONENTS

General Motors' Detroit Diesel Allison is developing ceramic hot flow path components for application to small vehicular industrial gas turbine engines. A key program element is the development of an appropriate methodology for predicting component reliability. Fast fracture design analysis procedures applicable to brittle material structures have been devised to predict the average performance of a blade attachment coupon (test sample). Coupon failure originates from a localized region of predicted peak stress and defects initiating failure in coupons control the strength of qualification MOR test specimens. The average failure speed of spin coupons is shown to be within 1.6% of the predicted value. Experimental results clearly establish the validity of design procedures. Methods used to obtain and analyze material strength characteristics, finite element modeling, blade coupon reliability computations, blade coupon spin test results, and failure testing are summarized.

• Supplemental Notes:
  • Also published in HS-028 833 (SAE-SP-465), "Advanced Gas Turbine Systems for Automobiles," Warrendale, Pennsylvania, 1980, p 69-77. Presented at SAE Congress and Exposition, Detroit, 25-29 February 1980.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Wertz, J L
  • Heitman, P W
• Publication Date: 1980

Media Info

• Pagination: 9 p.

Subject/Index Terms

• TRT Terms: Ceramic materials; Forecasting; Gas turbines; Performance; Reliability; Test procedures; Turbine engines
• Uncontrolled Terms: Performance analysis
• Old TRIS Terms: Test results
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00391840
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 800194, HS-028 840
• Files: HSL, USDOT
• Created Date: Jan 30 1985 12:00AM