Stress Analysis in Composite Piezoelectric Cylinder Made of PZT-۴ and PVDF Reinforced by Carbon Nanotubes

In the present study, static stresses analysis of carbon nano-tube reinforced composite (CNTRC) cylinder is investigated. Thermo-mechanical loads are applied on cylinder in presence of uniform longitudinal magnetic field and radial electric field. The surrounded elastic medium is modelled by Pasternak foundation because of its advantages to the Winkler type. Mechanical properties of composite cylinder are determined based on Mori-Tanaka theory. In order to study on the influence of composite matrix, the effective stress of composite cylinder made of PZT-۴ and PVDF are compared together. The detailed parametric study is conducted, focusing on the remarkable effects of magnetic field intensity, elastic medium, angle orientation and volume fraction of carbon nano-tubes (CNTs) on distribution of effective stress. Results demonstrated that fatigue life of CNTRC cylinder will be significantly dependent on magnetic intensity, angle orientation and volume fraction of CNTs. Results of this research can be used for optimum design of thick-walled cylinders under multi-physical fields.

Keywords:

Piezoelectric matrix , Mori-Tanaka method , Composite cylinder , Analytical method