1. Chair of Solid and Continuum Mechanics; Department of Mechanical Engineering; University of Siegen; Paul-Bonatz-Str.9-11 D-57068 Siegen Germany
2. Chair of Materials Engineering; Department of Mechanical Engineering; University of Siegen; Paul-Bonatz-Str.9-11 D-57068 Siegen Germany
3. Chair of Material Testing and Material Characterization; Institute of Materials Science; Technical University of Dresden; 01062 Dresden Germany