TY - JOUR A1 - Ziebs, Josef A1 - Aurich, Dietmar A1 - Erbe, H. H. A1 - Veith, Helmut A1 - Helms, Rolf T1 - The influence of the stress state on fracture toughness JF - International journal of pressure vessels and piping PY - 1981 SN - 0308-0161 VL - 9 SP - 221 EP - 232 PB - Applied Science Publ. Ltd. CY - Barking AN - OPUS4-31698 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -