期刊
CERAMICS INTERNATIONAL
卷 47, 期 20, 页码 28821-28836出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.07.043
关键词
Ceramic matrix composites; Multi-scale modelling; Progressive damage; Failure mechanisms; Finite element analyses
资金
- National Natural Science Foundation of China [11272207, 51809164]
A multi-scale modelling approach was developed in this paper to predict the progressive damage and failure behaviour of 2D woven SiC/SiC composites. By establishing models at the tow scale and meso-scale, the damage and failure processes of the composite were successfully simulated.
In this paper, a multi-scale modelling approach has been developed to predict the progressive damage and failure behaviour of 2D woven SiC/SiC composites. At the tow scale, non-linear tow properties have been determined by a micromechanics-based damage model, in which two scalar damage variables were introduced to characterize the fibre-dominated and matrix-dominated damage, respectively. Based on periodic boundary conditions, a meso-scale unit cell model has been established to simulate the macroscopic stress-strain responses and progressive damage processes of the composite under uniaxial tensile, compressive and in-plane shear loadings, respectively. In the numerical method, the non-linear properties of constituent materials have been implemented by the user defined subroutine, USDFLD of the finite element package, Abaqus. The numerical results and their comparisons with experimental stress-strain curves have been presented. The failure mechanisms of the composite under each loading have been also discussed. The high efficiency and prediction accuracy of the model make it possible to analyse large scale woven composites.
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