Abstract
Delaminations are common damages in laminated composites, which can significantly reduce the structural stiffness, which changes the dynamic response of the structures and therefore changes modal parameters such as natural frequency mode shape and damping. This paper presents effect of delamination lengths and locations on the natural frequencies of an electromechanical system consisting of a piezoelectric transducer glued on part of the upper surface of a laminated composite cantilever beam. To obtain dynamic responses of the structure transient analysis is carried out using ANSYS 13 software. From the dynamic responses frequency response functions (FRF) are obtained by using MATLAB code. Effectiveness of the proposed methodology is evaluated by numerical simulation of three delamination scenarios, i.e. delamination near fixed end, at center and at free end. It is observed that natural frequency decrease when length of delamination increases.
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