Download This PaperTwo Coupled Unit Problems in Shear-Lag Analysis of Fracture in Ceramic Matrix Composites
16 Pages Posted: 29 Apr 2020
Abstract
The progression of damage in ceramic matrix composites encompasses both the matrix and the fibers. The development of cracks in the matrix, and in the fibers, pose different unit problems for the shear lag analysis, even though they share the same interface. If the fracture strength of the matrix-component, normalized with its volume fraction, is weaker than the fiber-component, then it is predicted that the fiber fragments will bridge several matrix cracks. The ratio of the spacing between the breaks in the fibers, and in the matrix, is predicted to be equal to the ratio of their respective fracture loads.
Keywords: CMCs, shear lag, pull-out, fiber breaks, matrix breaks
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