Title: Decoupled formulation of constraints on adaptive hanging nodes in EUROPLEXUS
Authors: CASADEI FOLCOLARCHER MARTINVALSAMOS GEORGIOSFAUCHER Vincent
Publisher: Publications Office of the European Union
Publication Year: 2015
JRC N°: JRC96807
ISBN: 978-92-79-49574-8
ISSN: 1831-9424
Other Identifiers: EUR 27347
OP LB-NA-27347-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC96807
DOI: 10.2788/443207
Type: EUR - Scientific and Technical Research Reports
Abstract: The present report introduces the possibility of formulating the constraints on so-called “hanging” nodes which arise in adaptivity in a decoupled manner, rather than by using the standard, fully coupled treatment. The scope is to try reduce the CPU time required in some complex 3D applications, including those using adaptivity in shell elements. In these applications, when the number of hanging constraints may become huge and the (implicit) solution of the fully coupled problem may either require a large CPU time, if using the standard solver (Cholesky method), or may occasionally fail when using special solvers which are in principle more efficient.
JRC Directorate:Space, Security and Migration

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