Micromechanics-Based Evaluation of Interfaces in Ceramic Matrix Composites

Jacques Lamon; Stephane Pompidou

doi:10.4028/www.scientific.net/AST.50.37

Paper Titles

A New Generation of Boron-Based Ceramic Fibers: Design, Processing and Properties of SilicoBoron CarboNitride (SiBCN) Fibers from Boron-Modified Polyvinylsilazanes
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Advances in SiC Fibers for High Temperature Applications
p.17

Synthesis of SiCN-Precursors for Fibres and Matrices
p.24

Vibration Damping Properties of Nanotube-Reinforced Materials
p.31

Micromechanics-Based Evaluation of Interfaces in Ceramic Matrix Composites
p.37

The Influence of SiC Nano-Precipitates on the Interface Structure in C/C-SiC Composites
p.46

Improved Oxide-Based Interfacial Coatings for the Next Generation of CMC's
p.51

Thixoforged Al-Si Metal Matrix Composites Made from Thermally Sprayed Ceramic Fiber Laminates
p.57

Processing of Non-Oxide Ceramic Matrix Composites: An Overview
p.64

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 50Micromechanics-Based Evaluation of Interfaces in...

Micromechanics-Based Evaluation of Interfaces in Ceramic Matrix Composites

Abstract:

Interfaces are a key element in ceramic matrix composites, but also in several material assemblies, such as, for instance, multilayers. This is not only because they can cause crack deflection and make materials damage tolerant, but also because they can be tailored with regard to material performances. An approach to crack deflection at interfaces or within interphases is proposed on the basis of the following Cook and Gordon’s mechanism: a crack is nucleated along an interface, ahead of a propagating crack; deflection of this crack then results from coalescence with the interface crack. The stress state induced by a crack was computed in a cell of bimaterial using the finite element method. The cell represents a matrix and a fiber, or an interphase and a fiber or two layers in a multilayer. A master curve was established. It represents the debonding condition based on strengths and elastic moduli of constituents. Then a deviation potential was defined. Deviation potentials were calculated for various fibre/matrix or layer combinations.

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Periodical:

Advances in Science and Technology (Volume 50)

Pages:

37-45

DOI:

https://doi.org/10.4028/www.scientific.net/AST.50.37

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Online since:

October 2006

Authors:

Jacques Lamon, Stephane Pompidou

Keywords:

Composite, Debonding, Failure, Interface, Multilayer

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