Improved finite element modeling of piezoelectric beam with edge debonded actuator for actuation authority and vibration behaviour

Article

Abstract

The main emphasis of the present work is to model a piezoelectric beam with edge debonded actuator by employing finite element method based layerwise shear deformation theory, to improve the accuracy with which the actuation authority and natural frequencies are computed. The surface-bonded piezoelectric actuators and the host beam are considered to rotate individually due to shear deformation, while they are assumed to undergo the same flexural deflection and slope. These modeling aspects have improved the accuracy of the computed results. Edge debonding of actuator is accounted in the model by modeling healthy and debonded regions of the beam individually and subsequently applying the displacement continuity conditions at the interfaces of different regions. The investigations are carried out to find the effect of different extents of edge debonding on the actuation authority and natural frequencies of the debonded piezoelectric beam. It is found from the numerical results that the behaviour of the beam with edge debonded actuator is affected considerably as regards to the actuation authority and marginally with respect to natural frequencies. Further it has been shown that, when an actuator is edge debonded it introduces the local modes besides displaying significant reduction in its actuation authority.

Keywords

Piezoelectric beam Debonding of piezoelectric actuator Extension actuation mechanism (EAM) Actuation authority LWSDT 

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentB. M. S Evening College of EngineeringBangaloreIndia
  2. 2.Dynamics and Adaptive Structures, STTDNational Aerospace LaboratoriesBangaloreIndia
  3. 3.S. J. C. Institute of TechnologyChickballapurIndia

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