Method of cells-based multiscale modeling of elastic properties of filament wound C/C-SiC including free Si and matrix porosity. Issue 12 (December 2019)

• Record Type: Journal Article
• Authors: Pineda, Evan J.; Fassin, Marek; Reese, Stefanie; Simon, Jaan-Willem
• Is Part Of: Journal of materials science & technology. Volume 35:Issue 12(2019)
• Page Start: 2906
• Page End: 2918
• Publication Date: 2019-12
• Subjects: Multiscale modeling -- C/C-SiC -- Ceramic matrix composites; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.05.043
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: Three different multiscale models, based on the method of cells (generalized and high fidelity) micromechanics models were developed and used to predict the elastic properties of C/C-SiC composites. In particular, the following multiscale modeling strategies were employed: Concurrent modeling of all phases using the generalized method of cells, synergistic (two-way coupling in space) multiscale modeling with the generalized method of cells, and hierarchical (one-way coupling in space) multiscale modeling with the high fidelity generalized method of cells. The three models are validated against data from a hierarchical multiscale finite element model in the literature for a repeating unit cell of C/C-SiC. Furthermore, the multiscale models are used in conjunction with classical lamination theory to predict the stiffness of C/C-SiC plates manufactured via a wet filament winding and liquid silicon infiltration process recently developed by the German Aerospace Institute. Finally, un-reacted Si (or free Si) and porosity in the C matrix are included in the multiscale model, and the effect of these new phases on the stiffness and local stresses are considered.