1. Chair of Composite Engineering; University of Kaiserslautern; Bld. 44; Kaiserslautern 67653; Germany
2. Institute of Applied Mechanics; University of Kaiserslautern; Bld. 44; Kaiserslautern 67653; Germany
3. Institute for Surface and Thin Film Analysis GmbH; Trippstadter Straße 120; Kaiserslautern 67663; Germany