Single edge notched bend (SENB) specimens were prepared from steel weldments and crack tip opening displacement (CTOD) tests were carried out at different temperatures. Two specimen geometries, square (B×B) and r...Single edge notched bend (SENB) specimens were prepared from steel weldments and crack tip opening displacement (CTOD) tests were carried out at different temperatures. Two specimen geometries, square (B×B) and rectangular (B×2B) were used with a/W ratio ranging from 0.1 to 0.5 to investigate the effect of notch depth on plastic rotation factor and CTOD toughness. The CTOD values at initiation ( δ i) and maximum load ( δ m) for shallow cracked specimens were found to be significantly higher than those for the deep notched specimens. The plastic rotation factor was experimentally determined for shallow cracked specimens and found to be about 0.2.展开更多
文摘Single edge notched bend (SENB) specimens were prepared from steel weldments and crack tip opening displacement (CTOD) tests were carried out at different temperatures. Two specimen geometries, square (B×B) and rectangular (B×2B) were used with a/W ratio ranging from 0.1 to 0.5 to investigate the effect of notch depth on plastic rotation factor and CTOD toughness. The CTOD values at initiation ( δ i) and maximum load ( δ m) for shallow cracked specimens were found to be significantly higher than those for the deep notched specimens. The plastic rotation factor was experimentally determined for shallow cracked specimens and found to be about 0.2.
