Electro-thermo-mechanical Axial Buckling of a Piezoelectric Polymeric Cylindrical Shell Reinforced with DWBNNTs

چکیده مقاله

Using principle of minimum total potential energy approach in conjunction with Rayleigh-Ritz method, the axial buckling behaviour of piezoelectric polymeric cylindrical shell reinforced with double-walled boron-nitride nanotube (DWBNNT) is investigated in this article under combined electro-thermo-mechanical loadings. Classical boundary conditions such as simple and clamp supports are assumed. Coupling between electrical and mechanical fields are considered according to a representative volume element (RVE)-based micromechanical model. The critical axial buckling load for simple support boundary conditions is found to be smaller than that for the clamped ones. Moreover, the axial buckling load is almost independent of the axial half wave numbers when it is plotted versus the aspect ratio. This study indicates how buckling resistance of composite cylindrical shell may vary by applying thermal and electrical loads. Also, applying the reverse voltage or decreasing the temperature, increases the critical axial buckling load. This work showed that the piezoelectric BNNT enhances on the whole the buckling resistance of the composite cylindrical shell.