Abstract In this paper, we aim to explore the mechanical potentialities of a material made an orthogonal net fibers arranged in logarithmic spirals. Therefore, annular plate described with second-gradient model is envisaged evaluate behavior such nonlinear elastic regime when large displacements and deformations occur. Several tests are performed numerically under finite element method approxim...

Self-focused acoustic ejectors using the Fresnel zone plate (FZP) have been developed for ejecting viscous liquids, without nozzle, in the drop-on-demand mode. The FZP is composed of a lead zirconate titanate piezoelectric plate patterned with a series of annular electrodes, with the unelectroded region of the plate removed. Our results show that the acoustic waves are effectively self-focused ...

Subsea processing of oil/gas is performed by production system facilities, which are linked into a complete subsea connectors. High reliability and long service life the connectors, defined strict requirement deepwater oil fields, raise challenge design structure components to ASME-VIII code has been applied. The theoretical problems main parameters connector's hub detailed in this paper compar...

The friction forces generated during braking between brake pads and discs produce high thermal gradients on the rubbing surfaces. These thermal gradients may cause braking problems such as brake fade, premature wear or hot spotting and the associated hot judder phenomenon in the frequency range below 100 Hz. Further consequences are comfort reductions, a defective braking process, inhomogeneous...

In this paper, the transient response of a viscoelastic annular plate which has time-dependent properties is determined mathematically under dynamic transverse load. The axisymmetric conditions are considered in the problem. The viscoelastic properties obey the standard linear solid model in shear and the bulk behavior in elastic. The equations of motion are extracted using Hamilton’s principle...

By means of an asymptotic method the buckling under uniform external pressure thin cylindrical shell supported by identical annular plates is analyzed. Boundary conditions on internal parallel joined to a plate are obtained. At edges free support introduced. We seek approximate solutions eigenvalue problem as sum slowly varying functions and edge effect integrals. On parallel, where joint with ...