By adopting the absolute nodal coordinate formulation, a novel and general nonlinear theoretical model, which can be applied to solve dynamics of combined straight-curved fluid-conveying pipes with arbitrary initially configurations any boundary conditions, is developed in current study. Based on this established behaviors cantilevered L-shaped pipe conveying fluid without base excitations are ...

In this article, electro-thermo nonlocal nonlinear vibration and instability of viscous-fluid-conveying double–walled boron nitride nanotubes (DWBNNTs) embedded on Pasternak foundation are investigated. The DWBNNT is simulated as a Timoshenko beam (TB) which includes rotary inertia and transverse shear deformation in the formulation. Considering electro-mechanical coupling, the nonlinear govern...

Using harmonic differential quadrature (HDQ) method, nonlinear vibrations and instability of a smart composite cylindrical shell made from piezoelectric polymer of polyvinylidene fluoride (PVDF) reinforced with boron nitride nanotubes (BNNTs) are investigated while clamped at both ends and subjected to combined electro-thermo-mechanical loads and conveying a viscous-fluid. The mathematical mode...

In this study, electro-thermo-mechanical nonlinear vibration and instability of embedded piezoelectric micro-tube is carried out based on nonlocal theory and nonlinear Donnell's shell model. The smart micro-tube made of Poly-vinylidene fluoride (PVDF) is conveying an isentropic, incompressible fluid. The detailed parametric study is conducted, focusing on the remarkable effects of mean flow vel...

We study the spectral problem associated with equation governing small transverse motions of a viscoelastic tube finite length conveying an ideal fluid. The boundary conditions considered are general form, accounting for combination elasticity and viscous damping acting on both slopes displacements ends tube. These include many standard as special cases such clamped, free, hinged, guided condit...

In this article, the dynamical behavior of a standing cantilever pipe conveying fluid is investigated with time − delay. By applying piezoelectric materials and considering delay voltage, motion equation built motion-limiting constraints elastic support. The discretized into ordinary differential equations by Galerkin me...

In this research, wave propagation analysis in polymeric smart nanocomposite micro-tubes reinforced by single-walled carbon nanotubes (SWCNT) conveying fluid is studied. The surrounded elastic medium is simulated by visco-Pasternak model while the composite micro-tube undergoes electro-magneto-mechanical fields. By means of micromechanics method, the constitutive structural coefficients of nano...