RVE Model with Porosity for 2D Woven CVI SiCf/SiC Composites

Shen, Xiuli; Gong, Longdong

doi:10.1007/s11665-016-2393-9

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…The needling hole in the GMC model shows a stepped shape, whereas the FE model has a smooth transition, which is generally preferred by scholars. However, the microscopic observations demonstrated that the needling holes appeared irregular and rough [9,40], which is primarily caused by the non-circular needle cross-section and the pores in the matrix. The geometric conformity and mesoscopic structure characterization ability of the GMC model are examined in Reference [41], which also indicated that the GMC model is consistent with the FE model in simulating the mesoscopic stress distribution.…”

Section: Mesoscopic Damage Characterizationmentioning

confidence: 95%

“…In Figure 2, O-xyz denotes the global coordinate system, in which α, β, and γ signify the subcell numbers along the x, y, and z directions, respectively. scopic observations demonstrated that the needling holes appeared irregu [9,40], which is primarily caused by the non-circular needle cross-section an the matrix. The geometric conformity and mesoscopic structure characteriza the GMC model are examined in Reference [41], which also indicated that th is consistent with the FE model in simulating the mesoscopic stress distribu…”

Section: Components Parameter Valuementioning

confidence: 99%

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Assessment of Mechanical Properties for Three-Dimensional Needled Composites: A Geometric Partitioning Strategy Dealing with Mesoscopic Needling Damage

Wang

Liu

et al. 2022

Materials

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A geometric partitioning strategy was proposed to evaluate the mechanical properties of three-dimensional needled composites. The microstructure of the composite was divided to accurately characterize the mesoscopic damage in the needling regions and the macroscopic damage in the un-needling regions, to balance the computational accuracy and efficiency. The general method of cells (GMC) models along with the damage criteria were established for different material phases in the needling regions, while the continuum damage mechanics (CDM) model was adopted to portray the damage evolution in the un-needling regions. Through conducting the multi-scale simulation, the mechanical properties of the needled composites were predicted, based upon which the effect of repeated needling on the mesoscale damage process was further investigated. Results showed that the predictions are in good agreement with the experiments, with a relative error of 2.6% for strength and 4.4% for failure strain. The proposed approach can provide guidance for the process optimization and design of needled composites.

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Section: Mesoscopic Damage Characterizationmentioning

confidence: 95%