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- W2945408829 abstract "The present paper is focused on the analysis of the adhesion integrity of Single Lap Joints (SLJ). The technique adopted for the monitoring is based on the employment of vibration signals generated and received by piezo sensors attached on the specimens surfaces on the two opposite sides of the adhesive. Undamaged joints, when subjected to harmonic excitation, behave linearly exhibiting a spectral response including just the excitation frequency. As soon as the adhesive fails, harmonic excitation induces a rich variety of spectral components in the joints response, including subharmonics and superharmonics. A new approach is presented based on the beating resulting from the superposition of harmonic waves. The interpretation of the spectral content of the joint response is based on an analytical model of the single lap joint with different amounts of debondings associated with a nonlinear behaviour. Local Defect Resonance (LDR) conditions are promoted with the consequent superposition of defect with main structure vibration. Analytical results are compared with experiments and Finite Elements (FE) simulations demonstrating the consistence of the formulation. An efficient method for the Structural Health Monitoring (SHM) of the bonded single lap joints is provided, able to correlate the joint vibrational response to the debonding extension through the analysis of the response spectral content." @default.
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- W2945408829 date "2019-09-01" @default.
- W2945408829 modified "2023-09-25" @default.
- W2945408829 title "Subharmonics and beating: A new approach to Local Defect Resonance for bonded single lap joints" @default.
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- W2945408829 doi "https://doi.org/10.1016/j.jsv.2019.05.039" @default.
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