In the present study, the classical plate theory (CPT) was used to study sound radiation of forced vibrating thin circular plates coupled with piezoelectric layers using simply supported and clamped boundary conditions. The novelty of the study consists of an exact closed-form solution that was developed without any use of approximation. Piezoelectric, electrical potential loaded in the transve...

1. Tummala RR (2001) Fundamentals of microsystems packaging. McGraw-Hill International Edition, New York 2. JEDEC (2002) Design standard: design requirements for outlines of solid state and related products; JEDEC Publication 95, Design Guide 4.14-1/D, Ball Grid Array Package, JEDEC Solid State Technology Association 3. Vujosevic M (2006) Warpage of flip chip packages. In: Proceedings of IMECE2...

The calculation of the load carrying capacity of variable thickness circular plates subjected to arbitrary rotational symmetric loading is presented. The analysis considers plate materials that obey either the square or the Tresca yield criterion. By using upper and lower bound theorems of limit analysis, corresponding estimations for the load carrying capacity of the plate are obtained. It is ...

In this paper, accumulation of plastic deformation of AISI 1045 steel plates with circular cutouts under cyclic axial loading is studied. Loading was applied under force-control conditions. Experimental tests were performed using a Zwick/Roell servo hydraulic machine. Under force-control loading with nonzero mean force, plastic strain was accumulated in continuous cycles called ratcheting. Nume...

In the framework of the paraxial approximation, the analytical expression of a family of Hypergeometric-Gaussian beams type-II passing through a paraxial ABCD optical system with a circular annular aperture is derived by means the expansion of the hard aperture function into a finite sum of complex Gaussian functions and using the generalized Huygens-Fresnel diffraction integral. Based on the o...

A compact single-feed dual-band circularly polarized (CP) microstrip antenna is evaluated numerically and experimentally. The dual-band performances with small frequency ratio (about 1 : 1.1) are achieved by a circular patch and a narrow annular-ring, which have small difference in radius. The CP characteristics are achieved by an unequal cross-slot embedded in the circular patch and two orthog...