Design of Uni-Axially Loaded Components Fabricated from Tough Fibre-Reinforced Ceramic Matrix Composites

• Published in: Proceedings of the Royal Society. A, Mathematical and physical sciences Mathematical and physical sciences, 1991-08, Vol.434 (1891), p.383-397
• Main Authors: Haddad, S. H., Hayhurst, D. R., Leckie, F. A.
• Format: Article
• Language: English
• Subjects: Ceramic matrix composites; Composite materials; Construction materials; Load carrying capacity; Mathematical constants; Modeling; Moduli of elasticity; Parametric models; Simulations; Stress distribution
• ISSN: 1364-5021; 0962-8444; 1471-2946; 2053-9177
• DOI: 10.1098/rspa.1991.0098

A simple model for the stress-strain behaviour of a tough fibre-reinforced ceramic matrix composite, based on a single continuum damage mechanics parameter, has been used to study the behaviour of two kinematically determinate, one-dimensional, structures. The structures have been chosen to represent a class of components in which the fibre axes coincide predominantly with the maximum principal tension stress direction. It has been shown that the damage evolution due to the monotonic application of load results in stress redistribution, and that the load displacement characteristics of the structures reflect the characteristics of the stress—strain curve. The size of the predominant load bearing section influences the stress redistribution and hence the smoothness of the load-displacement curve. Approximate methods, based on the concepts of representative materials and structures, have been developed for the rapid prediction of the load-displacement characteristics which can be used at the early, or conceptual, stages of design.