Development of a new, more regular, mortar method for the coupling of NURBS subdomains within a NURBS patch: Application to a non-intrusive local enrichment of NURBS patches

摘要: In this work, we develop a mortar method for the coupling of NURBS sub-domains within patch that keeps benefit using more regular functions. The idea is to use two Lagrange multipliers match, across interface, tractions coming from discrete displacements in addition displacements. It results strategy suitable with continuity physical solution: when solution sufficiently smooth, enables represent C 1 behavior; but, only 0 displacement expected, no additional errors are introduced since traction force continuous and not whole derivative fields. Lower stress jumps at interface can then be observed which allows better transition information. As an application, non-intrusive algorithm also built proposed method, simple flexible local enrichments patches without loosing interest A range numerical examples two-dimensional linear elasticity carried out along comparisons other published techniques demonstrate performance its combined strategy.