TY  - JOUR
A1  - Most, Thomas
A1  - Eckardt, Stefan
T1  - Application of a hybrid parallelization technique to accelerate the numerical simulation of nonlinear mechanical problems
N2  - 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.
KW  - Framework <Informatik>
KW  - API
KW  - Parallelverarbeitung
KW  - Finite-Elemente-Methode
Y1  - 2004
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2599
ER  - 
TY  - CHAP
A1  - Häfner, Stefan
A1  - Eckardt, Stefan
A1  - Könke, Carsten
T1  - A geometrical inclusion-matrix model for the finite element analysis of concrete at multiple scales
N2  - 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.
KW  - Beton
KW  - Dreidimensionales Modell
KW  - Finite-Elemente-Methode
Y1  - 2003
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-3018
ER  -