1. Aerospace Structures and Computational Mechanics; Delft University of Technology; Kluyverweg 1 2629 HS Delft The Netherlands
2. Inst. for Computational Engineering and Sciences; University of Texas at Austin; 201 East 24th Street Austin TX 78712 USA
3. Dept. of Structural Engineering; University of California; San Diego, 9500 Gilman Drive La Jolla CA 92093 USA
4. Chair for Computation in Engineering; Technische Universität München; Arcisstraße 21 80333 Munich Germany