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Scalar boundary value problems on junctions of thin rods andplates

I. Asymptotic analysis and error estimates

Published online by Cambridge University Press:  13 August 2014

R. Bunoiu
Affiliation:
Universitéde Lorraine, Institut Elie Cartan de Lorraine, 7502 UMR, 57045 Metz, France.. [email protected]
G. Cardone
Affiliation:
University of Sannio − Department of Engineering, Piazza Roma, 21, 84100 Benevento, Italy.; [email protected]
S. A. Nazarov
Affiliation:
Mathematics and Mechanics Faculty, St. Petersburg State University 198504, Universitetsky pr., 28, Stary Peterhof, Russia.; [email protected]
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Abstract

We derive asymptotic formulas for the solutions of the mixed boundary value problem forthe Poisson equation on the union of a thin cylindrical plate and several thin cylindricalrods. One of the ends of each rod is set into a hole in the plate and the other one issupplied with the Dirichlet condition. The Neumann conditions are imposed on the wholeremaining part of the boundary. Elements of the junction are assumed to have contrastingproperties so that the small parameter, i.e. the relative thickness,appears in the differential equation, too, while the asymptotic structures cruciallydepend on the contrastness ratio. Asymptotic error estimates are derived in anisotropicweighted Sobolev norms.

Type
Research Article
Copyright
© EDP Sciences, SMAI 2014

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