The mechanical behavior analysis of CFCC with overall anisotropic damage by the micro-macro scale method

A micro macromechanical approach is used to establish the macroscopic constitutive model with anisotropic damage in continuous fiber reinforced ceramic matrix composites (CFCC). For microlevel analysis of unit cells, the homogenization method based on double-scale asymptotic expansion is used to der...

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Published in:International journal of damage mechanics 2003-04, Vol.12 (2), p.141-162
Main Authors: Luo, Dongmei, Takezono, Shigeo, Tao, Katsumi, Minamoto, Hirofumi
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Language:English
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container_title International journal of damage mechanics
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creator Luo, Dongmei
Takezono, Shigeo
Tao, Katsumi
Minamoto, Hirofumi
description A micro macromechanical approach is used to establish the macroscopic constitutive model with anisotropic damage in continuous fiber reinforced ceramic matrix composites (CFCC). For microlevel analysis of unit cells, the homogenization method based on double-scale asymptotic expansion is used to derive the material properties of composites. The macrolevel analysis is conducted to compute the macrostresses and strains with anisotropic damage. The two analyses are conducted using the FEM. An overall anisotropic damage tensor for the whole composite is used to describe all types of damage that composite undergoes, such as matrix cracking, fiber breakage, and interfacial damage between matrix and fiber. The damage evolution equation is obtained by using thermodynamic theory. The numerical calculation is carried out to investigate and to predict the onset and evolution of anisotropic damage for composites with different types of laminate. The damage material parameters are determined by fitting the numerical results to the experimental data, and some results compare well with experimental results in the literature.
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title The mechanical behavior analysis of CFCC with overall anisotropic damage by the micro-macro scale method
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