A Combined Micro-Mechanics, Fracture Mechanics, and Statistical Approach for Life Prediction of Ceramic Matrix and Metal Matrix Composites.
94-1 04.09 7093
A Combined Micro-Mechanics, Fracture Mechanics, and Statistical
Approach for Life Prediction of Ceramic Matrix and Metal Matrix
A new analytical technique that combines micromechanics, fracture
mechanics and statistical principles to predict fatigue life of
ceramic matrix and metal matrix composites is proposed. This
technique will incorporate a new three phase (fiber, matrix and
composite) micromechanics model that uses Coulomb friction at the
fiber-matrix interface and accounts for thermal and transverse
stresses. This new micromechanics analysis will be integrated with
a continuum fracture mechanics crack growth analysis and a
statistical fiber failure analysis into a consistent incremental
approach. The new analytical approach will be implemented into a
user-friendly and portable computer code, CMLIFE, for the damage
tolerance analysis of ceramic matrix and metal matrix composites.
The successful completion of this project will result in the
development of a new, general purpose analytical tool, CMLIFE, for
the damage tolerance analysis of ceramic matrix and metal matrix
composites and will, thereby, fulfill a critical need in the design
of high temperature components within the aircraft and automotive
industries. It will also have a menu-driven, point-and-click user
interface which will enhance its appeal to engineers and designers
in industry. It could also be incorporated into a finite element
program as a progressive damage constitutive model for the analysis
of components and structures made with ceramic
matrix and metal matrix composites.
Analytical Services and Materials, Inc.
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Hampton, Virginia 23666