Abstract
This is a study of the effects of geometry on the properties of a laminate made of dense, thin alumina plates alternating with carbon/epoxy (C/E) prepreg. An advantage of this system is the elimination of the large flaws occurring in fiber-reinforced ceramic matrix composites which are responsible for the low stresses at first matrix cracking. Previous studies have been restricted to small specimens of simple geometry. In this study attention has been directed to the influences of size. the introduction of notches and a geometry in which a large specimen is formed from a mosaic of small elements. The loss of stiffness with increase of the applied strain is compared to the predictions of a simple one-dimensional, elastic—plastic shear lag theory. Although this model does not account for the branching phenomena observed in experiment, there is good agreement with experiment, suggesting that branching has only a second order influence on mechanical properties.
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