VTT PUBLICATIONS 314 F 9700 74 The effect of specimen and flaw dimensions on fracture toughness Markku J. Nevalainen VTT Manufacturing Technology Dissertation for the degree of Doctor of Technology to be presented with due permission for public examination and debate in Auditorium K 216 at Helsinki University of Technology (Espoo, Finland) on the 1st of July, 1997, at 12 o’clock noon w 29-02 TECHNICAL RESEARCH CENTRE OF FINLAND ESPOO 1997