Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Abteilungen OPUS4-259 Wissenschaftlicher Artikel Most, Thomas; Eckardt, Stefan Application of a hybrid parallelization technique to accelerate the numerical simulation of nonlinear mechanical problems This paper presents the combination of two different parallelization environments, OpenMP and MPI, in one numerical simulation tool. The computation of the system matrices and vectors is parallelized with OpenMP and the solution of the system of equations is done with the MPIbased solver MUMPS. The efficiency of both algorithms is shown on several linear and nonlinear examples using the Finite Element Method and a meshless discretization technique. 2004 urn:nbn:de:gbv:wim2-20111215-2599 10.25643/bauhaus-universitaet.259 Professur Informatik im Bauwesen OPUS4-301 Konferenzveröffentlichung Häfner, Stefan; Eckardt, Stefan; Könke, Carsten A geometrical inclusion-matrix model for the finite element analysis of concrete at multiple scales This paper introduces a method to generate adequate inclusion-matrix geometries of concrete in two and three dimensions, which are independent of any specific numerical discretization. The article starts with an analysis on shapes of natural aggregates and discusses corresponding mathematical realizations. As a first prototype a two-dimensional generation of a mesoscale model is introduced. Particle size distribution functions are analysed and prepared for simulating an adequate three-dimensional representation of the aggregates within a concrete structure. A sample geometry of a three-dimensional test cube is generated and the finite element analysis of its heterogeneous geometry by a uniform mesh is presented. Concluding, aspects of a multiscale analysis are discussed and possible enhancements are proposed. 2003 urn:nbn:de:gbv:wim2-20111215-3018 10.25643/bauhaus-universitaet.301 Professur Informatik im Bauwesen