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IssuesArchive of Issues2001-1pp.24-29

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V. I. Gorbachev, "Averaging of linear problems in the mechanics of composites with nonperiodic inhomogeneities," Mech. Solids. 36 (1), 24-29 (2001)
Year 2001 Volume 36 Number 1 Pages 24-29
Title Averaging of linear problems in the mechanics of composites with nonperiodic inhomogeneities
Author(s) V. I. Gorbachev (Moscow)
Abstract Initial boundary value problems are considered for linear differential equations with variable coefficients. Such equations describe processes in composite materials whose mechanical characteristics may either have a jump or be continuous at the interface between the phases. Moreover, many problems in various branches of the mechanics of deformable solids reduce to linear equations with variable coefficients. In particular, this pertains to the problems of A. A. Il'yushin's theory of small elastic-plastic deformations [1], whenever these problems are solved by the methods involving variable elastic parameters [3]. The basic aim of any averaging method is to express the solution of a problem for an equation with variable coefficients through the solution of an equation with constant coefficients. If the coefficients periodically depend on the coordinates, good results can be obtained by the method of small geometrical parameter [4-6].

In the present paper, we propose an averaging method which is applicable both in the periodic and the nonperiodic cases.
References
1.  A. A. Il'yushin, Plasticity [in Russian], Gostekhizdat, Moscow, 1948.
2.  A. A. Il'yushin, Plasticity: Basic Principles of the Mathematical Theory [in Russian], Izd-vo AN SSSR, 1963.
3.  I. A. Birger, "Some general methods for solving problems in the theory of plasticity," PMM [Applied Mathematics and Mechanics], Vol. 15, No. 6, pp. 765-770, 1951.
4.  N. S. Bakhvalov and G. P. Panasenko, Averaging of Processes in Periodic Media [in Russian], Nauka, Moscow, 1984.
5.  B. E. Pobedrya, Mechanics of Composite Materials, Izd-vo MGU, Moscow, 1984.
6.  B. E. Pobedrya and V. I. Gorbachev, "On static problems for elastic composites," Vestnik MGU. Ser. Mat. Mekh., No. 5, pp. 101-111, 1975.
Received 03 October 2000
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