Impact-Induced Fracture in Laminated Plates and Shells

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Abstract
A study of the impact damage of laminated plates and cylindrical shells was conducted by experimental and numerical analysis. The curvature effect on the impact damage of composites was investigated. Laminating sequences of [0°5/90°5/0°5] and [90°5/0° 5/90°5 were considered. Detailed presentation of impact damage was provided through photographs and schematic diagrams. It is found that there are matrix cracks in the lower layer and delamination in the lower interface in plates, while the fiber crack in the upper layer, shear crack in the middle layer and delamination in the upper and lower interfaces are observed in cylindrical shells. A numerical analysis to predict and explain the crack initiation of laminated plates and cylindrical shells was also established.

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