Abstract
An accurate and efficient BEM/FEM scheme for elastostatic structural analysis is developed. The BEM component is based on DeFigueiredo's hybrid displacement boundary element model which leads to a symmetric stiffness matrix. Linear as well as quadratic boundary elements are employed. The FEM component is a displacement based finite element model employing linear as well as quadratic interpolation functions, or the MSC/NASTRAN general purpose finite element program. The resulting BEM/FEM scheme is characterized by symmetric matrices and perfect matching of nodal forces and displacements at the interface of the BEM and FEM domains. This leads to accurate results in an efficient way. Numerical examples dealing with elastostatic stress analysis and fracture mechanics under plane stress conditions are presented in order to illustrate the proposed methodology and demonstrate its merits.
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