%0 conference paper,conference lecture,GKSS report %@ %A Tzschichholz, F.,Pfuff, M. %D 1991 %J Fracture Processes in Concrete, Rock and Ceramics; Volume 1: Microscopic Material Studies and Material Engineering; Proceedings of the International RILEM/ESIS Conference Fracture Processes in Brittle Disordered Materials'' %N %P 251-260 %T Influence of crackpath roughness on crackresistance in brittle materials %U %X