A simple algorithm for localized construction of non-matching structural interfaces

A simple and e8ective algorithm for the modular construction of non-matched interfaces is presented for the partitioned solution of large-scale structural problems. The formulation is based on a recently developed four-;eld variational principle, which introduces a connection frame between the interfaced partitions. A key result of the present study is a frame nodal placement criterion that uniquely determines the frame discretization into piecewise linear elements so that the interface patch test condition is satis;ed a priori. The method is demonstrated with several 2D and 3D example problems