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Abstract

Notches accelerate the initiation and the growth of the matrix-dominated damage in composites. Different forms of matrix-dominated damage are observed in a notched cross-ply laminate, where transverse cracks (TC), notch-induced splits (NIS), and notch-induced delaminations (NID) occur simultaneously. These matrix-dominated damage systems, particularly NIS and NID, interact with each other and are important mechanisms for the failure process of a notched cross-ply laminate. In this article, a progressive failure approach is proposed and it is used to model the NIS growth in cross-ply laminates under the influence of other forms of matrix failure, transverse cracks (TC), and notch-induced delamination (NID). The numerical results indicate that a strong interaction effect does exist, which is obviously indicated by the NIS growth rates under different combined damage cases. As one of the most important results, the present modeling approach leads to a better understanding of the failure mechanisms of notched composite laminates. The numerical estimation of the NIS growth shows a good agreement with the experimental observations.

Keywords

notched laminates matrix cracks notch-induced splits progressive failure.

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Modeling Failure Interaction in Notched Cross-ply Laminates

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