05-03-2013, 01:06 PM
Probabilistic Creep Life Analysis of an Engine Combustor Composite Liner Performed
ABSTRACT
An engine combustor composite liner is required to operate at elevated temperatures
where creep is prevalent. The creep life analysis of a combustor
liner is, therefore, of great significance. The variation in material properties,
thermal loading, or mechanical loading makes it mandatory to perform a probabilistic
creep life analysis of an engine combustor composite liner. This work
was directed by the NASA Glenn Research Center to address this important
problem.
The MARC program was employed for the nonlinear creep life analysis of the
composite combustor liner. The figure on the next page displays the sensitivity
factors from the variation of various parameters on the life of the composite
combustor liner. Clearly, the reliability of the combustor composite liner is most
sensitive to thermal loads.