was appointed to the chair of engineering mechanics at the University of Paderborn in 1977, after previous positions as a private lecturer at MLU Halle-Wittenberg and as a lecturer or adjunct professor at the University of Karlsruhe. Since 1979 he has been a visiting professor at various universities in the USA, Bulgaria, France and China. He has been a member of the New York Academy of Sciences since 1981. His main research interests are in the fields of continuum mechanics, fracture mechanics, composite mechanics and materials science. His body of scientific work includes two monographs on fracture behavior of multiphase media and 260 scientific publications in reputed journals and conference proceedings.