船体用鋼板の破壊靱性値推定手法に関する一考察

概要

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How to assess the fracture toughness of base metal and welded joints with a high degree of accuracy is the matter of basic importance in selecting ship hull steel plate with consideration toward its toughness. The authors sought to devise a practical method suitable for that purpose in dealing with ship hull steel plates in general use (conventional rolled steel plates and TMCP-manufactured steel plates), with the results as capsulized below. (1) The absorbed energy transition temperature (_VT_<rE>) for V-notch Charpy impact tests at which the level of absorbed energy could meet the NK-specified requirement was estimated. (2) A method for estimating the fracture toughness (K_c value) from the 50 percent brittle fracture appearance transition temperature [_VT_<rS> (≒_VT_<rE>)] was developed.
社団法人日本船舶海洋工学会の論文
1988-03-22