NRL Memorandum Report 6141 Prediction of Classical Fracture Initiation Toughness V. GENH SmER DEGIoRGI, G. C. KIRBY Il AND M. I. JoLLuEs CMechanics of Materials Branch (V Materials Science and Technology Division 0 November 11, 1988 II DTIC ELECTE DC0 9 IMU 'I8 12 (q OR$ Approved for public release; distribution unlimited