The Weibull modulus, fracture toughness, and thermal properties of a silicon nitride material used to make a gas turbine combustor were experimentally measured. The location and nature of failure origins resulting from bend tests were determined with fractographic analysis. The measured Weibull parameters were used along with thermal and stress analysis to determine failure probabilities of the combustor with the CARES design code. The effects of data censoring, FEM mesh refinement, and fracture criterion were considered in the analysis.
Volume Subject Area:
Microturbines and Small Turbomachinery
Topics:
Ceramics,
Combustion chambers,
Event history analysis,
Failure,
Design,
Finite element methods,
Finite element model,
Fractography,
Fracture (Materials),
Fracture (Process),
Fracture toughness,
Gas turbines,
Probability,
Silicon nitride ceramics,
Stress analysis (Engineering),
Thermal properties
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Copyright © 1991 by ASME
