Thermo-electrical buckling of piezoelectric functionally graded material Timoshenko beams

Article

Abstract

In this article, buckling analysis of functionally graded material (FGM) beams with or without surface-bonded piezoelectric layers subjected to both thermal loading and constant voltage is studied. Thermal and mechanical properties of FGM layer is assumed to follow the power law distribution in thickness direction, except Poisson’s ratio which is considered constant. The Timoshenko beam theory and nonlinear strain-displacement relations are used to obtain the governing equations of piezoelectric FGM beam. Beam is assumed under three types of thermal loading and various types of boundary conditions. For each case of boundary conditions, existence of bifurcation-type buckling is examined and for each case of thermal loading and boundary conditions, closed-form solutions are obtained which are easily usable for engineers and designers. The effects of the applied actuator voltage, beam geometry, boundary conditions, and power law index of FGM beam on critical buckling temperature difference are examined.

Keywords

Thermal buckling Piezoelectric layers Bifurcation buckling Timoshenko beam theory 

Notes

Acknowledgements

The financial support of the National Elite Foundation is gratefully acknowledged.

References

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Copyright information

© Springer Science+Business Media, B.V. 2011

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentAmirkabir University of TechnologyTehranIran
  2. 2.Mechanical Engineering DepartmentIslamic Azad UniversityTehranIran

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