A novel elastoplastic constitutive model for woven oxide/oxide ceramic matrix composites with anisotropic hardening. (1st December 2019)

• Record Type: Journal Article
• Authors: Liu, Hui; Yang, Zhengmao; Yuan, Huang
• Is Part Of: Composite structures. Volume 229(2019)
• Publication Date: 2019-12-01
• Subjects: Oxide/oxide ceramic matrix composite -- Constitutive model -- Plastic potential function -- Anisotropic hardening -- Asymmetric tension and compression; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2019.111420
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: The oxide/oxide ceramic matrix composite exhibits superior mechanical properties in high temperature environment. However, complex nonlinear behavior is not clarified for high performance applications. The present work developed an elastoplastic constitutive model considering variations of hardening behavior over the stress states by introducing a novel loading function. The model can account for heterogeneous initial yield and complex hardening behavior accurately and was verified from experiments under tension and compression conditions with various off-axis angles. The computational results agree with stress-strain responses containing softening up to failure under arbitrary in-plane loading conditions.