Non-destructive damage identification is one of the most important problems in maintenance and reliability of composite structures. The methods applied for damage identification should be sensitive for external and internal damages and provide their precise localization. One of the promising methods for the damage identification is the wavelet transform applied to modal shapes of investigated o...

Abstract Critical velocities of a two-layer composite tube under uniform internal pressure moving at constant velocity are analytically determined. The formulation is based on Love–Kirchhoff thin shell theory that incorporates the rotary inertia and material anisotropy. consists two perfectly bonded axisymmetric circular cylindrical layers dissimilar materials, which can be orthotropic, transve...

Sometimes the need for non-circular ducts arises in many heat transfer applications because of lower pressure drop of non-circular cross section such as square duct compared to circular tube, particularly in compact heat. But square cross section has poor heat transfer performance and it is expected that using a nanofluid as a new heat transfer media may improve the heat transfer performance of...

A mathematical model of Peristaltic pumping of a particle-fluid suspension in a circular tube with an inserted catheter has been developed. The coupled differential equations for both the fluid and the particle phases have been solved and the expression for the flow rate, pressure drop, friction forces at the tube and the catheter wall have been derived. It is found that the pressure drop incre...

We report our searches for a single tubular tachyonic solution of regular profile on unstable non BPS D3-branes. We first show that some extended Dirac-Born-Infeld tachyon actions in which new contributions are added to avoid the Derrick’s no-go theorem still could not have a single regular tube solution. Next we use the Minahan-Zwiebach tachyon action to find the regular tube solutions with ci...

2014 The concentration distribution of a dilute suspension of neutrally buoyant rigid spheres is investigated theoretically, in the entry flow of a circular tube. The geometrical effects (interaction between the tube mouth and the particles) are discussed. The convective motion of the particles in a boundary layer flow through the tube (Re ~ 1) is analysed. The effect of an additional inertia-i...