Application and Analysis of Plane Woven C/SiC Composites Based on Continuum Damage Mechanics

Abstract:

The aim of this article was to propose a macroscopic damage model, which describes the nonlinear behavior observed on woven C/SiC ceramic matrix composites. The model was built within a thermodynamic framework with internal variables. The anisotropic damage evolution processes of the material were described by nonlinear damage isotropic and kinematic hardening functions in this model. The anisotropic damage and damage coupling were considered with a damage yield function including anisotropic coefficients. Using the principle of energy equivalence, the damage variables were defined by the unloading modulus and initial modulus. The damage variable and the irrecoverable strain induced by micro-crack propagation were deduced by thermodynamics. The constants of constitutive model were identified and the damage evolution processes under tensile and shear loading. Uniaxial tension and shear tests had been used to valid the constitutive model to C/SiC composites.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 3916-3919
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.3916
• Online since: March 2012
• Authors: Yan Jun Chang, Ke Shi Zhang, Gui Qiong Jiao, Jian Yun Chen
• Keywords: Anisotropic Damage, C/SiC Composites, Damage Constitutive Equation, Damage Hardening, Damage Irrecoverable Strain

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