Existence and uniqueness for frictional incremental and rate problems - sharp critical bounds

Andersson, Lars-ErikLinköpings universitet,Matematik och tillämpad matematik,Tekniska högskolan (författare)

We investigate frictional contact problems for discrete linear elastic structures, in particular the quasistatic incremental problem and the rate problem. It is shown that sharp conditions on the coefficients of friction for unique solvability of these problems are the same. We also give explicit expressions of these critical bounds by using a method of optimization. For the case of two spatial dimensions the conditions are formulated as a huge set of non symmetric eigenvalue problem. A computer program for solving these problems was designed and used to compute the critical bounds for some structures of relative small size, some of which appeared in the literature. The results of a variety of numerical experiments with uniform and non uniform distributions of the frictional properties are presented. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

NATURVETENSKAP Matematik Beräkningsmatematik hsv//swe
NATURAL SCIENCES Mathematics Computational Mathematics hsv//eng
Coulomb friction; quasistatic and rate problems; existence/uniqueness; sharp critical bounds; finite elements

Ingår i:Zeitschrift für angewandte Mathematik und Mechanik: WILEY-V C H VERLAG GMBH96:1, s. 78-1050044-22671521-4001

Av författaren/redakt...: Andersson, Lars- ...; Pinto da Costa, ...; Agwa, M. A.

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