Layer orientation effects on the R-curve behavior of multilayered alumina–zirconia composites

The crack growth resistance ( R-curve) behavior of multilayered alumina–zirconia composites was measured using a single-edge-V-notched-beam (SEVNB) testing method in which crack initiation and extension were observed via in situ optical microscopy. The influence of the relative layer orientation wit...

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Bibliographic Details
Published in:Composites. Part B, Engineering Engineering, 2006, Vol.37 (6), p.449-458
Main Authors: Moon, Robert J., Hoffman, Mark, Bowman, Keith, Trumble, Kevin
Format: Article
Language:English
Subjects:
A. Ceramic–matrix composites (CMCs)
A. Layered structures
B. Fracture
R-curve
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Summary:The crack growth resistance ( R-curve) behavior of multilayered alumina–zirconia composites was measured using a single-edge-V-notched-beam (SEVNB) testing method in which crack initiation and extension were observed via in situ optical microscopy. The influence of the relative layer orientation with respect to the crack-tip front through the composite on the resulting R-curves were measured and was found to have a pronounced influence on the measured crack growth resistance behavior. By increasing the layer offset, the specific influence of a given feature within the layered structure on the measured R-curve behavior was found to diminish.
ISSN:1359-8368
1879-1069
DOI:10.1016/j.compositesb.2006.02.021