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An accurate electro-mechanical impedance (EMI) model for analytical crack detection of a Timoshenko beam is established based on the improved reverberation-ray matrix method via the recursive formulations. The crack is treated as a massless rotational spring. A pair of PZT patches with free ends symmetrically bonded onto the beam is assumed in a state of pure one-dimensional axial motion under an...
An analytical description of the static characterization of a smart beam with surface-bonded piezoelectric transducers is developed in this paper. The uniform elastic beam is actuated by piezoelectric patches and modeled as an Euler-Bernoulli beam. The static analysis of the intelligent beam is then given in detail based on a transfer matrix method. Furthermore, the actuation mechanism of the piezoelectric...
The static response of an intelligent beam with surface-bonded piezoelectric patches is investigated in this paper. Timoshenko beam theory is employed to study the properties of beam-like structures bonded with multiple pairs of PZT patches. Here, only one-dimensional axial deformation of PZT wafers is considered. A shear lag model is adopted to simulate the interfacial bonding between PZT patches...
A hybrid method combining electro-mechanical impedance (EMI) technique and artificial neural network (ANN) is proposed to detect damages in structural systems. The structural members are treated as Timoshenko beams for flexural motion as well as the damages are modeled by changes in Young's modulus in the damaged area. For a structural member with surface-bonded PZT wafers, a coupled system is considered...
An analytical description of the static characterization of a curved beam with surface-bonded piezoelectric transducers is developed in this paper. The uniform curved beam is thin and actuated by distributed piezoelectric patches. The governing equations of these structures with small curvature are derived based on one-dimensional beam theory. The static analysis of the beam actuated by multiply distributed...
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