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Numerical treatment of mixed boundary value problems in two‐dimensional elastostatics
Author(s) -
Feldmann Jay W.,
Prager W.
Publication year - 1969
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620010106
Subject(s) - boundary value problem , finite difference , mathematics , displacement (psychology) , finite difference method , grid , mathematical analysis , stress (linguistics) , boundary (topology) , function (biology) , connection (principal bundle) , numerical analysis , geometry , psychology , linguistics , philosophy , evolutionary biology , psychotherapist , biology
Finite difference treatment of two‐dimensional problems in elastostatics is usually based on the differential equations for the displacement vector or the Airy stress function, depending on whether boundary conditions are on displacement or stress. In either case, determination of stresses requires numerical differentiation and therefore use of a rather fine grid. Moreover, neither method is suited to the treatment of mixed boundary conditions. The alternative method developed in this paper uses the first derivatives of the displacement components at the grid points as basic variables and hence does not require numerical differentiation in the evaluation of stresses. Appropriate finite difference equations are established, and their use is discussed in connection with a specific example with known explicit solution.