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摘要
To properly overcome the difficulties in modeling the anisotropy of continuous toughening phases and in predicting the overall moduli of ceramic matrix composites, this work developed an automatic digital methodology for modeling the complex roughly periodic microstructures together with a convenient technique for assigning the anisotropic material properties of the relevant performs of ceramic matrix composites (CMCs) by combining the level set method and the finite element method. Meanwhile, the CMC toughened by the two-dimensional SiC woven fabric (SiCf / SiC) was taken as an illustration to establish the multiscale computational strategy of accurately evaluating the overall anisotropic moduli of SiCf / SiC taking account of the natural pore effects based on the micromechanics scheme and self-programming. The validity of the digital modeling methodology as well as the computational algorithm for predicting the overall modli of SiCf / SiC in this study was demonstrated by comparing the numerical predictions with the experimental data in the open literature. Furthermore, the influence of the natural pore shapes and the waviness ratio of the fiber bundles were investigated in detail. ? 2023 Cailiao Daobaoshe/ Materials Review.
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