TY - JOUR A1 - Otto, Peter A1 - Lorenzis, L. A1 - Unger, Jörg F. T1 - Explicit dynamics in impact simulation using a NURBS contact interface T2 - International Journal for Numerical Methods in Engineering N2 - In this paper, the impact problem and the subsequent wave propagation are considered. For the contact discretization an intermediate NURBS layer is added between the contacting finite element bodies, which allows a smooth contact formulation and efficient element‐based integration. The impact event is ill‐posed and requires a regularization to avoid propagating stress oscillations. A nonlinear mesh dependent penalty regularization is used, where the stiffness of the penalty regularization increases upon mesh refinement. Explicit time integration methods are well suited for wave propagation problems, but are efficient only for diagonal mass matrices. Using a spectral element discretization and the coupled FE‐NURBS approach the bulk part of the mass matrix is diagonal. PB - Wiley Online Libary KW - Impact simulation KW - Explicit dynamics KW - Isogeometric analysis KW - Spectral elements KW - Mortar method PY - 2019 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/49494 AN - OPUS4-49494 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-494947 SP - 1 EP - 21 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany