Laminated anisotropic gently sloping shells and plates subjected to nonsteady forces and various temperature effects

We constructed a new and more accurate model of the state of stress and strain of laminated anisotropic shells and plates that takes into account the influence of dynamic factors on transverse shear strains, thermal strains in the transverse direction, and the non-steady nature of the deformation process. By the variational approach we obtained a system of equations of force-induced motion and the boundary conditions. After representation in the form of the slope deflection method the total order of the system is equal to 20 and does not depend on the number of layers. For rectangular laminated orthotropic pin-supported shells on analytical solution of the nonsteady-state problem of dynamics was obtained by expansion in modes. The results are compared with known three-dimensional solutions, and also with solutions based on other applied theories. The article shows that the introduction of additional desired functions of shear yields a more accurate state of stress and strain of a double-layered plate than the known models.Translated from Problemy Prochnosti, No. 1, pp. 91–101, January, 1996.     

Preparation of polycrystalline samples of the EuLnCuS<Subscript>3</Subscript> (Ln = Gd,Lu) compounds

Polycrystalline samples of the EuLnCuS₃ (Ln = Gd, Lu) compounds have been synthesized at 1220 and 1370 K by reacting flowing H2_S and CS₂ with mixtures of micron- and nanometer-sized particles of rare-earth mixed oxides and cuprates. The mixtures have been prepared at 1270 K by the thermolysis of cocrystallized rare-earth and copper nitrates and aqueous metal nitrate solutions sprayed into a reactor.     

Development of a Catalyst Based on Titanium Nanoparticles in a Zeolite Matrix

Glass and Ceramics - A catalyst was developed in the form of a composite based on a zeolite matrix modified with titanium nanoparticles based on zeolite raw materials from the Kulikovskoe deposit...     

PMZh-521-type glass feeders remodeled for electrically heated operation

PMZh-521-type glass feeders for line production of dark-green and transparent glass bottles are remodeled for electrically heated operation. The advantages of the innovative electrical heating technology are discussed.Translated from Steklo i Keramika, No. 11, pp. 6–8, November, 1996.     

Reliability and service life of VGKK series sealed lead-throughs for nuclear power plants

Evaluation tests of sealed cable lead-throughs for nuclear power plants are examined. It is shown that the currently existing systematic testing for the effect of all factors arising in a large-leak regime does not give a real picture of the resistance of sealed cable lead-throughs. Data on the admissible absorbed dose which are obtained only on the basis of tests for radiation resistance can be erroneous when extended to operating conditions where environmental factors act simultaneously. A testing chamber and a method for performing measurements under conditions simulating a regime with a large leak are described. __________ Translated from Atomnaya énergiya, Vol. 104, No. 3, pp. 161–164, March, 2008.     

Synthesis and gas permeation parameters of metathesis polytricyclononenes with pendant Me3E‐groups (E = C,Si, Ge)

Metathesis polytricyclononenes were synthesized via ROMP polymerization in the presence of the 1‐st generation Grubbs catalyst and their gas‐transport properties were studied for the first time. The aim of this work was to evaluate the influence of Me₃E‐groups (E = C, Si, Ge) on gas permeation parameters of ROMP materials. New metathesis poly(3‐tert‐butyltricyclononene‐7) and poly(3‐trimethylgermyltricyclononene‐7) were obtained with high yields (up to 95%) and high‐molecular weights (M_w～3–7×10⁵ g mol^?1). The glass transition temperatures of the ROMP polytricyclononenes with Me₃E‐groups decreased when E was changed from C to Si and then to Ge. It was shown that the polytricyclononene containing Me₃Si‐groups has the highest gas permeability while the polytricyclononene containing Me₃C‐substituents has the lowest gas permeability. In addition, the gas permeation parameters were estimated for ROMP Me₃Si‐ and Me₃Ge‐substituted polytricyclonona‐3,7‐dienes. So the influence of the second double bond in the monomer units on the permeability of the polymers obtained was studied. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41395.     

Determination of unsteady-state temperature fields in multilayered orthotopic plates

A new hypothesis on temperature distribution with respect to the thickness of a multilayered plate is proposed. An analytical solution of the unsteady-state heat conduction problem is obtained for rectangular multilayered orthotropic plates.Kiev Motor-Car and Road Institute, Ukraine. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 62, No. 4, pp. 486–491, October, 1992.