the finite element method is employed for the flexural-torsional linear buckling analysis of beams of arbitrarily shaped composite cross-section taking into account generalized warping (shear lag effects due to both flexure and torsion). the contacting materials, that constitute the composite cross section, may include a finite number of holes. a compressive axial load is applied to the beam. the...

The present study aims at developing A356/Al2O3(np) nano-composite with a novel and cost effective method for attaining homogeneous dispersion of Al2O3 nanoparticles in the Al matrix. In the current research, Al micro powders distributed on aluminum foil and then Al2O3 nanoparticles ultra-sounded in ethanol and sprayed on Al substrate. Subsequently, the sandwich foil was added to molten A356 du...

The natural vibrations of curved nano-beams and nano-arches are studied. under consideration have piecewise constant thickness; these weakened with stable cracks located at re-entrant corners the steps. A method determination frequencies is developed making use weightless rotating spring. aim paper to assess sensitivity eigenfrequencies on geometrical physical parameters nano-arch. results calc...

The free vibration analysis of rotating functionally graded (FG) nano-beams under an in-plane thermal loading is provided for the first time in this paper. The formulation used is based on Euler-Bernoulli beam theory through Hamilton’s principle and the small scale effect has been formulated using the Eringen elasticity theory. Then, they are solved by a generalized differential quadrature meth...

Background. Repairing aged composite resin is a challenging process. Many surface treatment options have been proposed to this end. This study evaluated the effect of different surface treatments on the shear bond strength (SBS) of nano-filled composite resin repairs. Methods. Seventy-five cylindrical specimens of a Filtek Z350XT composite resin were fabricated and stored in 37°C distilled wate...

Direct write lithography is used in all phases of nanotechnology development activities. In research, it is utilized to create nanostructures into which functional materials can be patterned on the nano-scale. In process development, direct patterning allows the flexible creation of devices with varying features to optimize behavior. In manufacturing of semiconductors and data storage devices, ...

We discuss the properties of composite (or vector) spatial optical solitons created by the incoherent interaction of two optical beams and associated with higher-order modes guided by a soliton-induced waveguide in a bulk medium. Such stationary (2 1 1)-dimensional self-trapped localized structures include, in particular, vortexand dipole-mode vector solitons and also incorporate higher-order m...