The scientific service project S01 has an overall interface position for the subprojects of the project areas A, B, and C. In the subprojects of project area A the influence of damage in forming processes such as rolling, extrusion, deep drawing, and bending is studied both experimentally and through process simulations. To this end, the process simulation by means of the finite element method (FEM) is used as a tool to analyze the local loading paths and stress states. While considering appropriate damage modeling, process simulations enable an analysis of the initiation and evolution of damage within the scope of forming technologies, and thus, the improvement of the process strategies.

The overall aim of S01 is to gain knowledge in regard to process simulation and parameter identification by providing software tools in project area A. Furthermore, in project area C generated material models are visualized. In order to describe the forming processes, especially in terms of damage evolution, the subprojects of project area A require material models at the beginning of the first funding period. Hence, the scientific service project further processes existing phenomenological state-of-the-art damage models, which have already been used within the TRR 188, for a commercial FE-software such as the models proposed by Lemaitre and Gurson-Tvergaard-Needleman. Additionally, fracture criteria, e.g. the Cockcroft-Latham criterion, are being used. In combination with the process models these material models should help to improve the forming processes at an early stage. These results act as a reference for the comparison with the models developed in project area C.

The material models are developed within project area C. The implementation within commercial software such as Abaqus is done in the scientific service project in order to provide tools for the projects in the technological subprojects of area A. An additional task of the scientific service project is the implementation of a software tool for the optimization-based parameter identification. The model integration of the non-local models as well as the parameter identification, especially for thermomechanically coupled models, are designated for the second funding period.

Project leaders
Dr.-Ing. Till Clausmeyer
Institute of Forming Technology and Lightweight Components (IUL), TU Dortmund University

Dr.-Ing. Richard Ostwald
Institute of Mechanics (IM), TU Dortmund University

Project coordinators
Alexander Schowtjak, M. Sc.
Institute of Forming Technology and Lightweight Components (IUL), TU Dortmund University

Robin Schulte M. Sc.
Institute of Mechanics (IM), TU Dortmund University