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A two-dimensional isogeometric boundary element method for elastostatic analysis. (English) Zbl 1243.74193
Summary: The concept of isogeometric analysis, where functions that are used to describe geometry in CAD software are used to approximate the unknown fields in numerical simulations, has received great attention in recent years. The method has the potential to have profound impact on engineering design, since the task of meshing, which in some cases can add significant overhead, has been circumvented. Much of the research effort has been focused on finite element implementations of the isogeometric concept, but at present, little has been seen on the application to the Boundary Element Method. The current paper proposes an Isogeometric Boundary Element Method (BEM), which we term IGABEM, applied to two-dimensional elastostatic problems using Non-Uniform Rational B-Splines (NURBS). We find it is a natural fit with the isogeometric concept since both the NURBS approximation and BEM deal with quantities entirely on the boundary. The method is verified against analytical solutions where it is seen that superior accuracies are achieved over a conventional quadratic isoparametric BEM implementation.
MSC:
74S15Boundary element methods in solid mechanics
65N38Boundary element methods (BVP of PDE)
65D17Computer aided design (modeling of curves and surfaces)
65T60Wavelets (numerical methods)
74F15Electromagnetic effects in solid mechanics
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