抄録
In this report, the dynamic fracture toughness KD defined by the dissipated energy was obtained, as to several common ship hull steels.
Using the double tension type large size specimen, crack propagation test was made and the crack velocity was measured. By this results, dynamic fracture toughness KD was calculated using dynamic numerical analysis. So that, the expression on KD was experimentally obtained and the crack propagation characteristics were compared.
