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A Critical Review on Modeling of Fracture Behavior of Ceramic Joints

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Abstract:

As examples of the most typical methods to determine the shear strength of SiC/SiC composite joints, the asymmetrical four point bending test of a butt-joined composite, the tensile test of a lap-joined composite, and the compression test of a double-notched composite joint were analyzed by using a finite element method with the interface element. From the results, it was found that the shear strength in the asymmetrical bending test was controlled by both the surface energy and the shear strength at the interface regardless of their combination while the strength in the tensile test or the compression test was governed by the surface energy when both the surface energy and the shear strength were large. In addition, the interface element was employed in order to examine the influence of the specimen geometry on the microstructural fracture morphology in nanoSiC/SiC composite during a miniaturized Double Notch Shear (DNS) test. From the serial computations, it is revealed that a relationship between the inter-laminar shear strength and the yield stress seems to be very important for selecting appropriate specimen geometry of the miniaturized DNS test.

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Periodical:

Advances in Science and Technology (Volume 88)

Pages:

121-130

DOI:

https://doi.org/10.4028/www.scientific.net/AST.88.121

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Online since:

October 2014

Authors:

Hisashi Serizawa*, Hidekazu Murakawa

Keywords:

Ceramic Composites, Finite Element Method (FEM), Interface Element, Shear Strength, Surface Energy

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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