in this paper, chaotic motion analysis and its control for a non-planar non-linear cantilever beam with axial and lateral parametric excitation in the free end is accomplished. this is a new method for control of chaotic motion of a non-linear planar beam. in this survey, internal resonance of the beam is 2:1 and the initial resonance is in the outside of plane and it is assumed a sub-resonance...

in this paper, eringen’s nonlocal elasticity and timoshenko beam theories are implemented to analyze the bending vibration for non-uniform nano-beams.  the governing equations and the boundary conditions are derived using hamilton’s principle. a generalized differential quadrature method (gdqm) is utilized for solving the governing equations of non-uniform timoshenko nano-beam for pinned-pinned...

Ion-induced damage and intermixing was evaluated in InGaN/GaN multi-quantum wells (MQWs) using 35 keV N(+) implantation at room temperature. In situ ion channeling measurements show that damage builds up with a similar trend for In and Ga atoms, with a high threshold for amorphization. The extended defects induced during the implantation, basal and prismatic stacking faults, are uniformly distr...

Formulations for a general theory of thermoelasticity to generate accurate thermal stresses for structural members of aeronautical vehicles were developed in 1954 by Boley. The formulation also provides three normal stresses and a shear stress along the entire length of the beam. The Poisson effect of the lateral and transverse normal stresses on a thermally loaded beam is taken into account in...

The idealized raked-wedge hull has a triangular waterplane with its base of finite beam at the transom stern and its apex of zero beam at the stem of the bow. The sections are rectangular and the draft increases linearly from zero at the stern to the maximum draft at the bow. This hullform provides a challenge for the traditional linear wave-making theory. Nevertheless, there is good agreement ...

Multibody dynamic simulations are performed for a large deployable space structure using ®nite element models and an explicit temporal integration procedure. The structure considered is NASA's light-weight, 8 m-aperture next generation space telescope (NGST). The NGST structure consists of beam components (modeled using beam ``super-elements'', each composed of two truss elements and a torsiona...