Numerical modeling of oxidized C/SiC microcomposite in air oxidizing environments below 800°C: Microstructure and mechanical behavior

Yingjie Xu, Pan Zhang, Huan Lu, Weihong Zhang

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

A numerical model is presented for simulation of the oxidation-affected behaviors of continuous carbon fiber-reinforced silicon carbide matrix composite (C/SiC) exposed to air oxidizing environments below 800. °C, which incorporates the modeling of oxidized microstructure and computing of degraded mechanical behavior. This model is based upon the analysis of the representative volume cell (RVC) of composite. C/SiC microcomposite (one single filament) is concerned in the present study. Analysis results of such a composite can provide a guideline for the real C/SiC composite. The microstructure during oxidation process is firstly modeled in the RVC. The stress distributions within the oxidized composite under uniaxial tensile loading are computed by finite element analysis. The failure behaviors of C/SiC microcomposite in air oxidizing environment are evaluated and validated in comparison to experimental data. The oxidation time, temperature and pressure are investigated to show their influences upon the mechanical behaviors of C/SiC microcomposite.

Original languageEnglish
Pages (from-to)3401-3409
Number of pages9
JournalJournal of the European Ceramic Society
Volume35
Issue number13
DOIs
StatePublished - 1 Nov 2015

Keywords

  • C/sic composite
  • Mechanical behavior
  • Microcomposite
  • Microstructure modeling
  • Oxidation

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