Impact of surface oxidation on damage evolution in metal matrix composites Conference Paper uri icon

abstract

  • The surface oxidation in Metal Matrix Composites (MMC) with a moving oxide-metal interface is analyzed by means of a fixed grid direct finite element method (FGDFEM). Oxidation in the metal matrix is modeled by Fickian diffusion of oxygen, while the oxidation process and the resulting immobilized oxygen at the interface is accounted for by the introduction of a jump discontinuity in the oxygen concentration across the interface. The 1-D problems of a uniformly growing oxide layer from the surface of a semi-infinite solid, outward oxygen diffusion and oxidation from a cylindrical cavity, as well as inward oxygen diffusion and oxidation from the surface of a cylinder, are considered as 1-D benchmark problems. The 2-D plane problem of oxidation from the surface of a square is also studied as a 2-D benchmark problem. A four-ply unidirectional SiC/Ti-15-3 MMC laminate undergoing transverse tension with a pre-existing surface oxide layer is investigated using a viscoplastic finite element analysis with damage evolution modeled by failing interface elements.

published proceedings

  • American Society of Mechanical Engineers, Applied Mechanics Division, AMD

author list (cited authors)

  • Xu, S., Lagoudas, D. C., & Allen, D. H

complete list of authors

  • Xu, S||Lagoudas, DC||Allen, DH

publication date

  • January 1995