EXASTEEL - Bridging Scales for Multiphase Steels

Drittmittelfinanzierte Gruppenförderung - Teilprojekt

Details zum übergeordneten Gesamtprojekt

Titel des Gesamtprojektes: SPP 1648: Software for Exascale Computing

Details zum Projekt

Prof. Dr. Gerhard Wellein

Markus Wittmann

Beteiligte FAU-Organisationseinheiten:
Professur für Höchstleistungsrechnen

Mittelgeber: DFG / Schwerpunktprogramm (SPP)
Projektstart: 01.11.2012
Projektende: 31.12.2015

Abstract (fachliche Beschreibung):

This project adresses algorithms and Software for the Simulation of three dimensional multiscale material science problems on the future Supercomputers developed for exascale computing.The performance of modern high strength steels is governed by the complex interaction of the individual constituents on the microscale. Direct computational homogenization schemes such as the FE2 method allow for the high fidelity material design and analysis of modern steels. Using this approach, fluctuations of the local field equations (balance laws) can be resolved to a high accuracy, which is needed for the prediction of failure of such micro-heterogeneous materials.Performing the scale bridging within the FE2 method for realistic problems in 3D still requires new ultra-scalable, robust algorithms and solvers which have to be developed and incorporated into a new application Software.Such algorithms must be specifically designed to allow the efficient use of the future hardware.Here, the direct multiscale approach (FE2) will be combined with new, highly efficient, parallel solver algorithms. For the latter algorithms, a hybrid algorithmic approach will be taken, combining nonoverlapping parallel domain decomposition (FETl) methods with efficient parallel multigrid preconditioners. A comprehensive performance engineering approach will be implemented guided by the Pl Wellein, to ensure a systematic optimization and parallelization process across all Software layers.This project builds on parallel Simulation Software developed for the solution of complex nonlinear structural mechanics problem by the Pls Schröder, Balzani and Klawonn, Rheinbach. !t is based on the application Software package FEAP (Finite Element Analysis Program, R. Taylor, UC Berkeley). Within a new Software environment FEAP has been combined with a FETI-DP domain decomposition solver, based on PETSc (Argonne National Laboratory) and hypre (Lawrence Livermore National Laboratory), e.g„ to perform parallel simulations in nonlinear biomechanics. The optimization, performance modeling and performance engineering will be guided by the Pl Wellein. The Pls Schröder and Balzani have performed FE2-simulations in the past using an extended version of FEAP.The envisioned scale-bridging for realistic, advanced engineering problems in three dimensions will require a computational power which will only be obtainable when exascale computing becomes available.

Externe Partner

Universität Duisburg-Essen (UDE)
Universität Köln
Technische Universität Bergakademie Freiberg


Klawonn, A., Lanser, M., Rheinbach, O., Stengel, H., & Wellein, G. (2015). Hybrid MPI/OpenMP Parallelization in FETI-DP Methods. In Recent Trends in Computational Engineering - CE2014 (pp. 67-84). -: Springer Link.

Zuletzt aktualisiert 2019-12-04 um 09:55