International Journal for Simulation and Multidisciplinary Design Optimization

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Int. J. Simul. Multidisci. Des. Optim. 1, 61-65 (2007)
DOI: 10.1051/ijsmdo:2007008

Mechanical and environmental models for ceramic matrix composites

Hui Mei, Laifei Cheng, Litong Zhang, Yongdong Xu and Qingfeng Zeng

National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China

(Received 30 June 2007; accepted 15 September 2007; published online12 December 2007)

Abstract
This paper outlines results from an experimental investigation on carbonaceous ceramic matrix composites (e.g., C/SiC) into mechanical behaviour under both monotonic tensile and step loadings, and into environmental behaviour exposed to oxidizing atmosphere containing oxygen. Complex damage phenomena like matrix microcracking, interficial debonding, fibre breakage and oxidation can occur in the serviced composites and result in progressive strain increase. These mechanisms can be modeled and formulated from the microscopic to macroscopic scales in order to predict damage development and final failure. The proposed models show good agreement with experiments and the ability to describe more complex damage procedure.

Key words: Ceramic-matrix composites -- mechanical properties -- environmental damage -- modeling