Micromechanical model of time-dependent damage and deformation behavior for an orthogonal 3D-woven SiC/SiC composite at elevated temperature in vacuum

Published on Sep 1, 2020in Journal of The European Ceramic Society4.495
· DOI :10.1016/J.JEURCERAMSOC.2020.04.029
Yoshito Ikarashi1
Estimated H-index: 1
(TUAT: Tokyo University of Agriculture and Technology),
Toshio Ogasawara29
Estimated H-index: 29
(TUAT: Tokyo University of Agriculture and Technology)
+ 0 AuthorsTakuya Aoki5
Estimated H-index: 5
(JAXA: Japan Aerospace Exploration Agency)
Abstract This paper presents a micromechanical model to predict the time-dependent damage and deformation behavior of an orthogonal 3-D woven SiC fiber/BN interface/SiC matrix composite under constant tensile loading at elevated temperature in vacuum. In-situ observation under monotonic tensile loading at room temperature, load–unload tensile testing at 1200 °C in argon, and constant load tensile testing at 1200 °C in vacuum were conducted to investigate the effects of microscopic damage on deformation behavior. The experimentally obtained results led to production of a time-dependent nonlinear stress–strain response model for the orthogonal 3-D woven SiC/SiC. It was established using the linear viscoelastic model, micro-damage propagation model, and a shear-lag model. The predicted creep deformation was found to agree well with the experimentally obtained results.
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