Effect of thermal residual stress on the tensile properties and damage process of C/SiC composites at high temperatures. Issue 3 (1st February 2022)

• Record Type: Journal Article
• Authors: Zhang, Qi; Ge, Jingran; Zhang, Binbin; He, Chunwang; Wu, Zhenqiang; Liang, Jun
• Is Part Of: Ceramics international. Volume 48:Issue 3(2022)
• Page Start: 3109
• Page End: 3124
• Publication Date: 2022-02-01
• Subjects: Ceramic matrix composites -- Mechanical properties -- Thermal expansion -- Damage -- Modeling/model; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.10.085
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Due to the mismatch of the thermal expansion coefficients between the matrix and yarns, thermal residual stress will appear in C/SiC composites. In this paper, a progressive damage model was used to predict the thermal-mechanical behavior of C/SiC composites and reveal the failure mechanism. Firstly, the properties of the composites under tensile load were tested at three different temperatures in vacuum. Then, the elastic-plastic progressive damage constitutive laws were used and implemented by a user-defined subroutine UMAT in ABAQUS. The thermal residual stress evolution in the cooling and heating processes was characterized. Finally, the stress-strain curves of the composites under tensile load at different temperatures were studied. The effects of thermal residual stress on the tensile properties and progressive damage process of C/SiC composites were revealed sequentially. This work can give design guidance for strengthening of C/SiC composites.