き裂開口変位COD_<max>の試験片寸法依存性とシャルピー衝撃試験結果との相関

概要

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In order to study the behavior of crack opening displacement at the maximum load, COD_<max>, per British Standard 5762, the COD tests were conducted using 3.7% Ni-Cr-Mo-V steel in the upper shelf region. The test results obtained are as follows. (1) The COD_<max> value depends on the specimen size and yield strength of the material. (2) The COD_<max> value increases with increasing specimen size, of which the tendency is remarkable in the material with lower yield strength. (3) When the yield strength increases, the COD_<max> value decreases, especially more remarkable in the larger specimen. (4) The following correlation between COD_<max> and 2 mm V-notch Charpy impact energy is confirmed. (COD_<max>)/(σ_Y)=m'((CVN_<-us>)/(σ_Y)-0.11) (5) The constant m' depends on the specimen thickness B. m'=0.010√<B>
社団法人日本材料学会の論文
1984-12-15