Accession Number N20120012848
Title Modeling of Damage Initiation and Progression in a SiC/SiC Woven Ceramic Matrix Composite.
Publication Date Apr 2012
Media Count 14p
Personal Author P. J. Bonacuse R. K. Goldberg S. K. Mital
Abstract The goal of an ongoing project at NASA Glenn is to investigate the effects of the complex microstructure of a woven ceramic matrix composite and its variability on the effective properties and the durability of the material. Detailed analysis of these complex microstructures may provide clues for the material scientists who design the material. or to structural analysts and designers who design with the material. regarding damage initiation and damage propagation. A model material system, specifically a five-harness satin weave architecture CVI SiC/SiC composite composed of Sylramic-iBN fibers and a SiC matrix, has been analyzed. Specimens of the material were serially sectioned and polished to capture the detailed images of fiber tows, matrix and porosity. Open source analysis tools were used to isolate various constituents and finite elements models were then generated from simplified models of those images. Detailed finite element analyses were performed that examine how the variability in the local microstructure affected the macroscopic behavior as well as the local damage initiation and progression. Results indicate that the locations where damage initiated and propagated is linked to specific microstructural features.
Keywords Ceramic matrix composites
Crack initiation
Damage
Fiber composites
Finite element method
Microstructure
Porosity
Silicon carbides
Woven composites


 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 71F - Composite Materials
Corporate Author National Aeronautics and Space Administration, Cleveland, OH. NASA John H. Glenn Research Center at Lewis Field.
Document Type Conference proceedings
Title Note N/A
NTIS Issue Number 1303
Contract Number N/A

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