Abstract
Under combined electro-thermo-mechanical loadings, the nonlinear bending of piezoelectric cylindrical shell reinforced with boron nitride nanotubes (BNNTs) is investigated in this paper. By employing nonlinear strains based on Donnell shell theory and utilizing piezoelectric theory including thermal effects, the constitutive relations of the piezoelectric shell reinforced with BNNTs are established. Then the governing equations of the structure are derived through variational principle and resolved by applying the finite difference method. In numerical examples, the effects of geometric nonlinear, voltage, temperature, as well as volume fraction on the deflection and bending moment of axisymmetrical piezoelectric cylindrical shell reinforced with BNNTs are discussed in detail.
Highlights
boron nitride nanotubes (BNNTs) are similar to CNTs in structure and their extraordinary mechanical properties, but are different in that BNNTs possess higher temperature resistance to oxidation and stronger piezoelectric characteristics
We aim to study the nonlinear bending of axisymmetrical piezoelectric shell reinforced with BNNTs under combined electro-thermo-mechanical loadings
The nonlinear bending of piezoelectric shell reinforced with BNNTs under electro-thermo-mechanical loadings is investigated in the following calculations
Summary
BNNTs are similar to CNTs in structure and their extraordinary mechanical properties, but are different in that BNNTs possess higher temperature resistance to oxidation and stronger piezoelectric characteristics. Unlike CNTs, BNNTs have stable semiconducting behavior with a large band gaps regardless of radius and chirality of the structure. This property of BNNTs makes them promising candidate materials in a large variety of nanosized electronic and photonic devices. With the development of science and technology, a new sort of smart nanocomposites, with piezoelectric material as matrix and BNNTs as the reinforcement, has attracted increasing interests in both research and engineering communities. It is necessary to do more extensive researches on the nonlinear behavior for this structure
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