Transient response of piezoelectric bi-stable laminates under impact load
The electromechanical response of bi-stable carbon fiber composite laminates containing piezoelectric material layers under a centrally solidly supported boundary was theoretically investigated after being subjected to an impact load.Based on a hypothetical displacement field containing 17 unknown parameters,the strain-displacement relationship was obtained by using the first-order shear deformation theory.According to the energy principle,the electromechanical motion equation of the system was obtained by the Lagrange equation,and the electromechanical response of the system under the transient impact of sudden load,incremental load,sinusoidal load and air explosion load were studied,respectively.The results show that the snap-through phenomenon is closely related to the input of external work,and the instantaneous voltage amplitude generated by the snap-through is about 10 times that of the non-snap-through.
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