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In order to reveal the failure mechanism and to predict the stress concentrations and residual strengths for single edge or central notched unidirectional laminates under tension, a shear-lag model that each lamina in laminates was divided into finite sub-elements was proposed on the basis of the shear-lag theory. Then the stress redistributions for notched unidirectional laminates under tension were analyzed and the stress concentration factors in intact fibers at root of the notch were obtained. Based on the knowledge of these stress redistributions, the tensile strengths of notched unidirectional laminates at different notch lengths were studied by using a statistical fracture theory. The present results are in a relatively good agreement with the existing experimental values.

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