Smart Structures and Systems

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Finite element modeling and bending analysis of piezoelectric sandwich beam with debonded actuators

  • Rao, K. Venkata (Department of Mechanical Engineering, B.M.S Evening College of Engg) ;
  • Raja, S. (Structural Technologies Division, CSIR-National Aerospace Laboratories) ;
  • Munikenche, T. (Principal, S.J.C. institute of Technology)
  • Received : 2012.04.11
  • Accepted : 2013.03.05
  • Published : 2014.01.25
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Abstract

The present work pays emphasis on investigating the effect of different types of debonding on the bending behaviour of active sandwich beam, consisting of both extension and shear actuators. An active sandwich beam finite element is formulated by using Timoshenko's beam theory, characterized by first order shear deformation for the core and Euler-Bernoulli's beam theory for the top and bottom faces. The problem of debondings of extension actuator and face are dealt with by employing four-region model for inner debonding and three-region model for the edge debonding respectively. Displacement based continuity conditions are enforced at the interfaces of different regions using penalty method. Firstly, piezoelectric actuation of healthy sandwich beam is assessed through deflection analysis. Then the effect of actuators' debondings with different boundary conditions on bending behavior is computationally evaluated and experimentally clamped-free case is validated. The results generated will be useful to address the damage tolerant design procedures for smart sandwich beam structures with structural control and health monitoring applications.

Keywords

References

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