On the Efficient Reconstruction of Displacements in FETI Methods for Contact Problems
David Horak, Zdenek Dostal, Radim Sojka
DOI: 10.15598/aeee.v15i2.2322
Abstract
The final step in the solution of contact problems of elasticity by FETI-based domain decomposition methods is the reconstruction of displacements corresponding to the Lagrange multipliers for “gluing” of subdomains and non-penetration conditions. The rigid body component of the displacements is usually obtained by means of a well known but quite complex formula, the application of which requires reassembling and factorization of some large matrices. Here we propose a simple formula which is applicable to many variants of the FETI based algorithms for contact problems. The method takes a negligible time and avoids reassembling or factorization of any matrices.