Journal of Theoretical
and Applied Mechanics
56, 4, pp. 1097-1108, Warsaw 2018
DOI: 10.15632/jtam-pl.56.4.1097

Finite element study on thermal buckling of functionally graded piezoelectric beams considering inverse effects

Reza Nasirzadeh, Bashir Behjat, Mahsa Kharazi
In this article, the buckling behavior and bifurcation point of Functionally Graded Piezoelec-
tric (FGP) beams are investigated based on Euler-Bernoulli beam theory. The finite element
method is employed to model the beam in thermal environment. The material properties
of the beam are considered to vary gradually in the thickness direction and the beam is
subjected to electrical and thermal loading. In this paper, direct and inverse piezoelectric
effects are considered and buckling of the beam in the sensor state is investigated. By solving
the eigenvalue problem, the buckling load of the FGP beam is obtained and the effect of
various parameters such as power law index, temperature, applied voltage and beam aspect
ratio on the buckling load are investigated. The results show that the boundary conditions
are the main factor that affects the buckling load of the FGP beam.
Keywords: FGPM beam, buckling load, inverse piezoelectric effect, thermal environment

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