Radical addition of methyldichlorosilane to ketones

Radiation-induced reaction of methyldichlorosilane with ketones is shown to form products of radical addition to the carbonylic group. Competition kinetics method was used to determine relative rate constants of methyldichlorosilyl radical addition to some ketones.

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Catalytic pyrolysis of polymeric mixtures

The pyrolysis of polymers with varying composition of the initial polymeric mixture was studied. It was shown that during the pyrolysis of a polymeric mixture, an increase in the rate and number of volatiles were observed in relation to the pyrolysis of certain types of polymers. It was determined that introducing cobaltous chloride into the sample composition increases the effectiveness of the process.     

The Dynamics of Thin-Walled Structures Under Nonstationary Loads

Studies are reviewed in which nonstationary loads determining the dynamics of thin-walled structures are found and the initial concepts are formulated for the theory and methods of stress–strain analysis of shells with holes and different discrete reinforcements, as well as for coupled problems of hydro- and aeroelasticity. Special attention is drawn to the design and strength and dynamic analyses of thin-walled blasting chambers. The basic investigations conducted at the S. P. Timoshenko Institute of Mechanics of the National Academy of Sciences of Ukraine are outlined     

Forced Nonstationary Vibrations of a Sandwich Cylindrical Shell with Cross-Ribbed Core

The equations of nonaxisymmetric vibrations of sandwich cylindrical shells with discrete core under nonstationary loading are presented. The components of the elastic structure are analyzed using a refined Timoshenko theory of shells and rods. The numerical method used to solve the dynamic equations is based on the integro-interpolation method of constructing finite-difference schemes for equations with discontinuous coefficients. The dynamic problem for a sandwich cylindrical shell under distributed nonstationary loading is solved with regard for the discreteness of the core__________Translated from Prikladnaya Mekhanika, Vol. 41, No. 2, pp. 60–67, February 2005.