A chemo‐mechanical coupled constitutive model applied to the oxidation simulation of SiC/SiC composite. Issue 6 (26th August 2022)

• Record Type: Journal Article
• Authors: Bian, Jie; Chen, Xihui; Sun, Zhigang; Niu, Xuming; Yao, Xubo; Wu, Weijing; Song, Yingdong
• Is Part Of: International journal of applied ceramic technology. Volume 19:Issue 6(2022)
• Page Start: 3223
• Page End: 3237
• Publication Date: 2022-08-26
• Subjects: chemical properties -- composites -- mechanical properties -- SiC/SiC; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.14157
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: Herein, a chemo‐mechanical coupled constitutive and failure model is proposed to predict the tensile behavior of SiC/SiC composites under oxidizing environments. The diffusion of O2 through the oxide scale and the oxidation reaction of SiC/O2 are modeled and implemented in finite element software, through a user‐defined element. Numerical validation studies and tests are conducted on a domestic SiC fiber. An orthotropic constitutive model for reinforcements, which considers modulus reduction due to oxidation damage, and a continuum damage model associated with O2 diffusion along the micro‐cracks in the SiC matrix are subsequently presented. The developed framework is used to simulate the mechanical behavior and oxidation process of a single fiber SiC/SiC composite.