In this paper, the capabilities of displacement curvature derived from static response data for finding the location and severity of damage in Euler-Bernoulli beams are assessed. Static response of a beam is obtained using the finite element modeling. In order to reduce the number of measured nodal displacements, the beam deflection is fitted through a polynomial function using a limited number...

Mechanical foundations and pavements design need a perfect prediction of the response of the material to reach a reliable and safe structure. This work deals with the thermoelastic response of microbeams rested on a two-parameter viscoelastic foundation due to a magnetic field in the context of the dual - phase lag thermoelasticity model. The solutions of the governing equations are attained us...

A fifth-generation poly(propylene imine) dendrimer decorated with palmitoyland azobenzene-containing alkyl groups forms giant vesicles in aqueous solutions with diameters from 50 nm up to 20 μm and a multilaminar onion-like structure. Dense and ordered arrangement of the azobenzene chromophores in the bilayer structure leads to fluorescence with λmax= 600 nm. The fluorescence intensity can be i...

We study the reflection of a tightly focused Gaussian beam off a near symmetric resonant tunneling structure comprising two identical coupled waveguides. The coupled waveguides are loaded on each side by a spacer layer and a high index prism. Reflection of a Gaussian beam from such a resonant structure is associated with beam distortion and even beam splitting. We start with the distortion of t...

Vertically aligned carbon nanotube field emitters with 100 nm-dot array structure were fabricated using dc plasma enhanced chemical vapor deposition, where dot catalysts were patterned by electron beam lithography. In order to optimize the growth condition of VACNTs, the morphologies of CNTs were investigated by changing gas ratio between NH3 and C2H2 gases. It was found that morphology of CNTs...

There are two different ways of using SMA wires as actuators for shape control of flexible structures; which can be either embedded within the composite laminate or externally attached to the structure. Since the actuator can be placed at different offset distances from the beam, external actuators produce more bending moment and, consequently, considerable shape changes with the same magnitude...

Topologically interlocked materials and structures, which are assemblies of unbonded interlocking building blocks, promising concepts for versatile structural applications. They have been shown to exhibit exceptional mechanical properties, including outstanding combinations stiffness, strength, toughness, beyond those achievable with common engineering materials. Recent work has established a t...