Damage in oxidized titanium metal matrix composites
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The oxidation effects on surface crack development of oxidized Ti 15-3 and Ti -21S Metal Matrix Composite (MMC) unidirectional laminates under applied mechanical loading are investigated in the present study. Experimental results of surface crack development as a function of applied load are presented. An approximate mechanical model is established and a stress analysis of an oxidized laminate with surface cracks is performed. To simplify the analysis, motivated by experimental observations, a periodic distribution of surface cracks in the oxide layer is assumed. The critical value of the applied mechanical load, which is necessary for the formation of new cracks, as a function of crack density and phase transformation induced eigenstrain are studied.
American Society of Mechanical Engineers, Aerospace Division (Publication) AD
author list (cited authors)
Lagoudas, D. C., Xu, S., Miller, D., & Allen, D. H.