金属材料への破壊力学の適用に関する考察

概要

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The fracture toughness K_<IC> of steels is experimentally estimated by the equation K_<IC> = kσ_T√<I_<CP>/E> where σ_T is true fracture stress, I_<CP> Charpy impact value, E Young's modulus and k a nondimensional constant. This equation is applied to the estimation of K_<IC> of the materials that are supposed to be fractured according to the theory of the linear fracture mechanics including the range of general yielding conditions. The physical basis of this equation is not yet clear and many problems resolved are discussed, which suggests that the framework of linear fracture mechanics will be retained with necessary change of basic concept of fracture.
国立科学博物館の論文