Modelling Of Load Transfer Between
Porous Matrix And Short Fibres In
Ceramic Matrix Composites
Author(s)
J. G. P. Silva, D. Hotza, R. Janssen & H. A. Al-Qureshi
Abstract
The aim of this work is to present a model of load transfer between porous
matrix and short fibres in ceramic matrix composites. This analysis is based on
the earlier shear-lag models used for polymeric composites. However, geometry
and strength of fibres in addition to the matrix porosity are included in the
present analysis. The theoretical curves for the longitudinal and shear stresses
distributions along the fibre-porous matrix interface are presented. They
exhibited a maximum strength point at the middle of the short fibres. It became
evident that the critical length is governed by the relative properties of the fibres,
matrix and porosity, which greatly influenced the load carrying capacity of the
fibres in the composites. In addition, the present simplified solution facilitates
the understanding of the interface mechanism using porous matrix.
Keywords: modelling, ceramic matrix composites, shear-lag models, porous
ceramics.
1 Introduction
Modern structural ceramic composites possess a number of unique properties
that cannot be achieved by other materials. Therefore, they have a potential for
saving energy, reducing wear, and increasing the lifetime of components [1].
However, regardless of their remarkable properties, structural ceramics are not as
widely used in industry as they should and could be. Among the reasons for the
reluctance of industry to introduce structural ceramic as components are [1]:
• high price of ceramic parts,
• insufficient knowledge in \“traditional” metal-oriented engineering,
Keywords
modelling, ceramic matrix composites, shear-lag models, porous
ceramics
Related Book
Other papers in this volume
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