Abstract
In the present paper, a modal analysis of undamaged and damaged Carbon Fibre Reinforced Polymer (CFRP) beam elements with fixed and free ends and a cross-ply (0°/90°/0°) rectangular beam with clamped boundary conditions at both ends is investigated for damage identification. The presence of single and multiple damages in composite structures based on changes in the dynamic properties of the structure are considered. The Modal Strain Energy (MSE) damaged indicator based on frequency and mode shape combined with composite structure is studied. To enhance the results, the sensitivity of MSE using mode shape is investigated by varying the number of modes. The results showed that MSE using frequency much better than mode shape. Moreover, MSE with the first mode is much better than other modes.
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