Dicyanofuroxan is a new and interesting high explosive that can be used instead of some classical explosives. The present density functional treatment considers dicyanofuroxan its ring opened dinitroso isomer. has been based on theory at the level UB3LYP/6-311++G(d,p). Within constraints basis set employed results indicated form electronically more stable thermodynamically favored compared to r...

The aim of the work is to study stress-strain state reinforcing bars during bending and obtain appropriate formulas dependencies clarify possible boundaries use mandrels for reinforcement various classes diameters. object are used as transverse in design linear reinforced concrete elements. determines limits bars, where relative deformations steel do not go beyond yield strength. A formula obta...

Superplasticity denotes the ability of a limited number materials to achieve exceptionally high tensile elongations at least 400%. Experiments show that Al-Mg-Sc alloys provide excellent capabilities for achieving superplastic flow and also they can be formed easily in biaxial forming operations. It is important, therefore, examine mechanism when alloy prepared using different procedures. This ...

Improving the mechanical properties of epoxy-based adhesives with nanoparticles is one methods which justifies use adhesive joints significantly. This work studies strength adhesively bonded single-lap (SLJs) considering pure adhesive, reinforced nano-silica particles (NSPs), nano-clay (NCPs), and a combination both nano particles. Uniaxial tensile testing SLJs was conducted to reveal failure l...

Although chemistry dependence in the non-linear rheology of polymers has been rather established for uniaxial elongations, it not frequently discussed fast shear. In this study, to see effect orientation-dependent monomeric friction on shear rheology, we conducted primitive chain network simulations a few poly(propylene carbonate) melts, which have determined model from data recently [Yang et a...

A computational fluid dynamics approach is used to analyse the influence of beam shaping in fusion welding on melt thermal flow. Three shapes are studied at several travel speeds: a reference Gaussian profile and its elliptic elongations along transverse direction. It found that these change not only intensity direction thermocapillary flow but also pattern. For instance, contrary other profile...

Context. Laser guide stars (LGS) allow adaptive optics (AO) systems to reach greater sky coverage, especially for AO correcting the atmospheric turbulence on large fields of view. However LGS suffer from limitations, among which is their apparent elongation can 20 arcsec when observed with aperture telescopes such as European Southern Observatory 39 m telescope. The consequences this extreme ha...

The proposed embedded strain sensor consists of six elastic rings, placed in an icosahedral symmetry, whose measured elongations give access to the complete 3D tensor surrounding matrix. linear relationship between ring and matrix is given. From this relation it deduced that isotropic, i.e. its sensitivity independent rotation more sensitive hydrostatic strains than deviatoric strains. addition...

The zodiacal light is the dominant source of the mid-infrared sky brightness seen from Earth, and exozodiacal light is the dominant emission from planetary and debris systems around other stars. We observed the zodiacal light spectrum with the mid-infrared camera ISOCAM over the wavelength range 5–16 µm and a wide range of orientations relative to the Sun (solar elongations 68 • –113 •) and the...

The simulated Doppler shifts of the solar Mg I Fraunhofer line produced by scattering on the solar light by asteroidal, cometary, and trans-Neptunian dust particles are compared with the shifts obtained by Wisconsin H-Alpha Mapper (WHAM) spectrometer. The simulated spectra are based on the results of integrations of the orbital evolution of particles under the gravitational influence of planets...