We evaluated the potential and limitations of resonating nanomechanical microcantilevers for the detection of mass adsorption. As a test system we used mass addition of gold layers of varying thickness. Our main findings are: (1) A linear increase in mass sensitivity with the square of the mode number—a sensitivity increase of two orders of magnitude is obtained from mode 1 to mode 7 with a min...

This paper presents a numerical solution for vibration analysis of a cantilever trapezoidal thick plate. The material of the plate is considered to be graded through the thickness from a metal surface to a ceramic one according to a power law function. Kinetic and strain energies are derived based on the Reissner-Mindlin theory for thick plates and using Hamilton's principle, the governing equa...

Rotating fluid-filled shell structures can be used for different applications in technique. Because of spin-softening as well stress-stiffening it is essential to consider geometrical non-linearities. Additionally, shear deformation getting important case thick shells. At this point theories from KIRCHHOFF-LOVE (no deformation) and MINDLIN-REISSNER (first order are compared with each other. For...

Design, fabrication, and testing of a micromachined cantilever beam that is optically transmissive and operates in the resonant mode is presented with application as a micro-optical scanner. An optical waveguide is formed from a 2.2 mm thick SiO2 layer deposited on a single crystal silicon wafer and etched to yield a SiO2/Si composite slab cantilever. Using a novel capacitively coupled reactive...

PANDA2, a computer program for the minimum-weight design of elastic perfect and imperfect stiffened cylindrical panels and shells under multiple sets of combined loads, is used to obtain optimum designs of uniformly axially compressed elastic internal T-ring and external T-stringer stiffened cylindrical shells with initial imperfections in the form of the general buckling mode. The optimum desi...

Glycosaminoglycans (GAGs) have numerous applications in the fields of pharmaceuticals, cosmetics, nutraceuticals, and foods. GAGs are also critically important in the developmental biology of all multicellular animals. GAGs were isolated from chicken egg components including yolk, thick egg white, thin egg white, membrane, calcified shell matrix supernatant, and shell matrix deposit. Disacchari...

We describe calculations of the properties of quantum fluids inside nanotubes of various sizes. Very small radius (R) pores confine the gases to a line, so that a one-dimensional (1D) approximation is applicable; the low temperature behavior of 1D He is discussed. Somewhat larger pores permit the particles to move off axis, resulting eventually in a transition to a cylindrical shell phase—a thi...

This review paper aims to present an updated review of papers, conference papers, books, dissertations dealing with nonlinear vibrations of circular cylindrical thin shells. This paper surveyed mathematically, experimentally, analytically, numerically analyzed vibrations of cylindrical shells. This includes shells of open type, closed type, with and without fluid interactions; shells subjected ...

Cylindrical shell in engineering has different cross-section, i.e., circular section, oval rectangular and so on. In this work, numerical analysis is conducted on natural vibration of cylindrical with the difference studied between modal frequency shape from section shell. Numerical results show that, same length, width /thickness boundary condition, first 10 order nearly 60% bigger than that T...