FE2TI: Computational Scale Bridging for Dual-Phase Steels

Martin Lanser, Universität Köln

A scale bridging approach combining the well-known FE² method with parallel domain decomposition (FE2TI) is presented. The scale bridging approach incorporates phenomena on the microscale into the macroscopic problem. The FE2TI approach is used in the project "EXASTEEL - Bridging Scales for Multiphase Steels" (part of the German priority program SPPEXA) for the simulation of modern dual-phase steels. The new C/C++ implementation uses PETSc and efficient solver packages such as BoomerAMG, MUMPS, and UMFPACK are interfaced. In order to bring large micro-macro simulations to modern supercomputers, the FE2TI approach combines the FE2

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