Suspensions of single-walled, double-walled and multi-walled carbon nanotubes (CNTs) were generated in the same solvent at similar concentrations. Films were fabricated from these suspensions and used in carbon nanotube/silicon heterojunction solar cells and their properties were compared with reference to the number of walls in the nanotube samples. It was found that single-walled nanotubes ge...

0927-0256/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.commatsci.2009.12.007 * Corresponding author. Tel.: +1 540 231 6051; fax E-mail address: [email protected] (R.C. Batra). Free vibrations of thirty-three armchair, zigzag and chiral single-walled carbon nanotubes (SWCNTs) of aspect ratios (length/diameter) between 3 and 15 and having free ends have been studied using the MM3 potential. ...

This article examines the nonlinear vibrations of a thin-walled structure such as cylindrical shell interacting with ground. On basis seismodynamic theory underground structures, nature movement is revealed depending on stiffness coefficient and rheological properties soil, well frequency external influences. When solving specific problems, seismic waves in form sinusoid are considered. Nonline...

The unstable combustion problem in small-sized solid rocket engines with a large aspect ratio is so complicated that its causes remain unclear. In this study, the coupled vibration between sound field and shell was proposed as possible cause. A engine structure abstracted into multilayer thin-walled cylindrical cavity followed by theoretical calculation simulation of inherent frequency. Next, f...

AQUINAS is a specialised MATLAB finite element (FE) toolbox for the nonlinear analysis of axisymmetric thin-walled shell systems, conceived by Authors to recover research functionality once widely available but now largely lost in age supposedly ‘general’ 3D FE software. exploits powerful built-in sparse linear algebra routines with efficient matrix assembly pre-compiled and parallelised C++ co...

A fast vibration reduction optimization approach accelerated by the global proper orthogonal decomposition (POD) reduced-order model (ROM) is proposed, aiming at increasing efficiency of frequency response analysis and complex thin-walled shells. At offline stage, POD ROM adaptively updated using sample configurations generated CV (cross validation)–Voronoi sequence sampling method. In comparis...

This study selects titanium dioxide (TiO2) and multi-walled carbon nanotubes (MWCNTs) as far-infrared materials (FIRMs), further adds water-based acrylic coatings to prepare (FIRCs). FIRCs are uniformly coated on #304 stainless steel sheets make the test samples, which then installed between shell insulation material of hot water heater measure influences various performance heater. The researc...