GLTRS--Glenn
TITLE AND SUBTITLE:
Damage Tolerance and Reliability of Turbine Engine Components

AUTHOR(S):
Christos C. Chamis

REPORT DATE:
December 1999

FUNDING NUMBERS:
WU-523-22-13-00

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
John H. Glenn Research Center at Lewis Field
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-11613

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, DC 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Paper

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TP-1999-209878

SUPPLEMENTARY NOTES:
Portions of this paper were presented at the Qualification of Life Extension Schemes for Engine Components Workshop sponsored by the NATO Research and Technology Organization, Corfu, Greece, October 5-9, 1998. Responsible person, Christos C. Chamis, organization 5000, (216) 433-3252.

ABSTRACT:
This report describes a formal method to quantify structural damage tolerance and reliability in the presence of a multitude of uncertainties in turbine engine components. The method is based at the material behavior level where primitive variables with their respective scatter ranges are used to describe behavior. Computational simulation is then used to propagate the uncertainties to the structural scale where damage tolerance and reliability are usually specified. Several sample cases are described to illustrate the effectiveness, versatility, and maturity of the method. Typical results from this method demonstrate that it is mature and that it can be used to probabilistically evaluate turbine engine structural components. It may be inferred from the results that the method is suitable for probabilistically predicting the remaining life in aging or deteriorating structures, for making strategic projections and plans, and for achieving better, cheaper, faster products that give competitive advantages in world markets.

SUBJECT TERMS:
Probabilistic algorithms; Progressive fracture; Component reliability; Fault-tree

NUMBER OF PAGES:
20

PDF AVAILABLE FROM URL:
1999/TP-1999-209878.pdf
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