Author/Authors :
Ghorbanpour Arani a، A نويسنده Faculty of Mechanical Engineering, b Institute of Nanoscience & Nanotechnology,University of Kashan, Kashan, I.R.Iran , , Haghshenas، A نويسنده Departement of Mechanical Engineering of Isalamic Azad University of Khomaynishahr, I.R.Iran. , , Azami، M نويسنده Faculty of Mechanical Engineering, b Institute of Nanoscience & Nanotechnology,University of Kashan, Kashan, I.R.Iran , , Amir، S نويسنده Faculty of Mechanical Engineering, b Institute of Nanoscience & Nanotechnology,University of Kashan, Kashan, I.R.Iran , , Khoddami Maraghi ، Z نويسنده Faculty of Mechanical Engineering, b Institute of Nanoscience & Nanotechnology,University of Kashan, Kashan, I.R.Iran ,
Abstract :
Electro-thermo-elastic stress analysis of piezoelectric polymeric
thick-walled cylinder reinforced by boronnitride nanotubes (BNNTs)
subjected to electro-thermo-mechanical fields is presented in this
article. The electro-thermo-elastic properties of piezoelectric fiber
reinforced composite (PEFRC) was studied by a modified XY
micromechanical model capable of exhibiting full coupling relation
between electric, thermal and elastic fields. Assuming the basic
relation for the axisymmetric deformation of a thick-wall cylinder
subjected to uniform internal and external pressures, an axial
electrical load, a temperature change
T ?
between inner and outer
radius are derived. The stress results suggest that increasing BNNTs
content in longitudinal direction reduces the effective stress. Also,
displacement along radial direction indicates an optimum content of
5% BNNT for this. Furthermore, at normal working conditions, the
influence of thermal and mechanical fields are much higher than the
electric one on the effective stress; hence, this smart structure is best
suited for applications as sensors than actuators.
