Micromechanical fatigue experiments for validation of microstructure-sensitive fatigue simulation models

International Journal of Fatigue, vol. 160, pp. 106824

Abstract

Crack initiation governs high cycle fatigue life and is sensitive to microstructural details. While corresponding microstructure-sensitive models are available, their validation is difficult. We propose a validation framework where a fatigue test is mimicked in a sub-modeling simulation by embedding the measured microstructure into the specimen geometry and adopting an approximation of the experimental boundary conditions. Exemplary, a phenomenological crystal plasticity model was applied to predict deformation in ferritic steel (EN1.4003). Hotspots in commonly used fatigue indicator parameter maps are compared with damage segmented from micrographs. Along with the data, the framework is published for benchmarking future micromechanical fatigue models.

Authors 8

1. Ali Riza Durmaz corresponding

   Karlsruhe Institute of Technology · University of Freiburg · Fraunhofer Institute for Mechanics of Materials

   Affiliation as printed

   Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg, Germany

   Fraunhofer Institute for Mechanics of Materials, 79108 Freiburg, Germany

   Institute for Applied Materials IAM, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany

2. Erik Natkowski Aachen Integrity of Materials and Structures Steel Institute

   RWTH Aachen University · Robert Bosch (Germany)

   Affiliation as printed

   Integrity of Materials and Structures, Steel Institute, RWTH Aachen University, 52072 Aachen, Germany

   Robert Bosch GmbH, Center for Research and Advance Engineering, 71272 Renningen, Germany

3. Nikolai Arnaudov

   University of Stuttgart · Robert Bosch (Germany)

   Affiliation as printed

   Material Testing Institute, University of Stuttgart, 70569 Stuttgart, Germany

   Robert Bosch GmbH, Center for Research and Advance Engineering, 71272 Renningen, Germany

4. Petra Sonnweber–Ribic

   Robert Bosch (Germany)

   Affiliation as printed

   Robert Bosch GmbH, Center for Research and Advance Engineering, 71272 Renningen, Germany

5. Stefan Weihe

   University of Stuttgart

   Affiliation as printed

   Material Testing Institute, University of Stuttgart, 70569 Stuttgart, Germany

6. Sebastian Münstermann Aachen Integrity of Materials and Structures Steel Institute

   RWTH Aachen University

   Affiliation as printed

   Integrity of Materials and Structures, Steel Institute, RWTH Aachen University, 52072 Aachen, Germany

7. Christoph Eberl

   University of Freiburg · Fraunhofer Institute for Mechanics of Materials

   Affiliation as printed

   Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg, Germany

   Fraunhofer Institute for Mechanics of Materials, 79108 Freiburg, Germany

8. Peter Gumbsch

   Karlsruhe Institute of Technology · Fraunhofer Institute for Mechanics of Materials

   Affiliation as printed

   Fraunhofer Institute for Mechanics of Materials, 79108 Freiburg, Germany

   Institute for Applied Materials IAM, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany