Local-Global Analysis of Crack Growth in Continuously Reinforced Ceramic Matrix Composites | Zendy

R. Ballarini | Zendy; Shafique Ahmed | Zendy

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Local-Global Analysis of Crack Growth in Continuously Reinforced Ceramic Matrix Composites

Author(s) -

R. Ballarini,

Shafique Ahmed

Publication year - 1990

Publication title -

journal of engineering for gas turbines and power

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.567

H-Index - 84

eISSN - 1528-8919

pISSN - 0742-4795

DOI - 10.1115/1.2906197

Subject(s) - materials science , ceramic matrix composite , composite material , composite number , ceramic , parametric statistics , matrix (chemical analysis) , anisotropy , structural engineering , mathematics , engineering , physics , statistics , quantum mechanics

This paper describes the development of a mathematical model for predicting the strength and micromechanical failure characteristics of continuously reinforced ceramic matrix composites. The local-global analysis models the vicinity of a propagating crack tip as a local heterogeneous region (LHR) consisting of springlike representations of the matrix, fibers, and interfaces. This region is embedded in an anisotropic continuum (representing the bulk composite), which is modeled by conventional finite elements. Parametric studies are conducted to investigate the effects of LHR size, component properties, interface conditions, etc. on the strength and sequence of the failure processes in the unidirectional composite system. The results are compared with those predicted by the models developed by Marshall et al. (1985) and by Budiansky et al. (1986).

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