Title: Implementation of Assembled Surface Normals and of a Penalty Contact Formulation in the Pinball Model of EUROPLEXUS - Revision 1
Authors: CASADEI FOLCOLARCHER MARTINVALSAMOS GEORGIOSFAUCHER VINCENT
Publisher: Publications Office of the European Union
Publication Year: 2018
JRC N°: JRC111429
ISBN: 978-92-79-85697-6
ISSN: 1831-9424
Other Identifiers: EUR 29217 EN
OP KJ-NA-29217-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC111429
DOI: 10.2760/06819
Type: EUR - Scientific and Technical Research Reports
Abstract: This is a completely revised version of the report "Implementation of Assembled Surface Normals and of a Penalty Contact Formulation in the Pinball Model of EUROPLEXUS", EUR 26714 EN, JRC90939, 2014 [18]. The major changes are: * A different choice of the definition of the contact normal. The old definition was taken from the original work of Belytschko et al. The new definition is opposite to the previous one, to be in accordance with the pre-existing implementation of the pinball contact algorithm without ASN and based on Lagrange multipliers (strong formulation) in EUROPLEXUS and documented in reference [13]. * The fact that for shell/beam/bar elements without a topological thickness the ASN is defined only apart from the sign is now taken into account in the algorithm to compute the contact normal. * The case of contact between two corner pinballs in 3D ( - contact) is now treated by the more accurate expression using the line joining the closest points on the two segments, instead of the generic expression. * The calculation of the ASN for a descendent pinball of shell type in 3D has been revised, as concerns the case of a descendent near a node of shell element. This yields more consistent normals in this case.
JRC Directorate:Space, Security and Migration

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